4,393 community and non-transient non-community water systems are listed for California in EPA SDWIS. 729 were sampled under UCMR 5; 245 of those had at least one PFAS result at or above the reporting level, and 171 had a highest single result at or above a 2024 EPA limit (PFOA or PFOS 4 ppt, or Hazard Index 1).
California map · Download: systems (CSV) · all results (CSV, gzip)
These are monitoring results collected under EPA's Fifth Unregulated Contaminant Monitoring Rule (UCMR 5) at entry points, where treated water enters the distribution system; they are not tap-water samples. They are not compliance determinations: compliance with EPA's 2024 PFAS limits is judged on running annual averages of compliance monitoring, required from 2029, so a single UCMR 5 result at or above a limit is not a violation. “< MRL” means the compound was not quantified at EPA's minimum reporting level; it does not mean zero.
Sampled under UCMR 5 (729)
| System | PWSID | City | Population | Highest PFOA (ppt) | Highest PFOS (ppt) | Highest HI | Highest single result |
|---|---|---|---|---|---|---|---|
| Adelanto, City Of | CA3610001 | Adelanto | 39,930 | <MRL | 4.5 | 0.47 | PFOS 1–3 × its limit |
| Alameda County Water District | CA0110001 | Fremont | 344,000 | <MRL | <MRL | 0 | No PFAS detected |
| Alco Water Service | CA2710001 | Salinas | 56,253 | <MRL | <MRL | 0 | No PFAS detected |
| American Canyon, City Of | CA2810005 | American Canyon | 18,423 | <MRL | <MRL | 0 | No PFAS detected |
| American Valley Csd | CA3210004 | Quincy | 3,778 | <MRL | <MRL | 0 | Other PFAS detected |
| American Water O&M, Llc - Vsfb | CA4210700 | Vandenberg Sfb | 14,971 | <MRL | <MRL | 0 | No PFAS detected |
| Angels, City Of | CA0510003 | Angels Camp | 3,836 | <MRL | <MRL | 0 | No PFAS detected |
| Arcata, City Of | CA1210001 | Arcata | 18,857 | <MRL | <MRL | 0 | No PFAS detected |
| Armona Community Services Dist | CA1610001 | Armona | 4,143 | <MRL | <MRL | 0 | No PFAS detected |
| Arrowhead Villas Mutual Service Company | CA3610093 | Skyforest | 2,644 | <MRL | <MRL | 0 | No PFAS detected |
| Arvin Community Services Dist | CA1510001 | Arvin | 19,669 | <MRL | <MRL | 0 | No PFAS detected |
| Atascadero Mutual Water Co | CA4010002 | Atascadero | 33,307 | 8.4 | 22.3 | 0.765 | PFOS ≥ 3 × its limit |
| Atascadero State Hospital | CA4010832 | Atascadero | 1,100 | <MRL | 33 | 3.403 | PFOS ≥ 3 × its limit |
| Avenal, City Of | CA1610002 | Avenal | 13,696 | <MRL | <MRL | 0 | No PFAS detected |
| Averydale Mwc | CA1910023 | Lancaster | 1,026 | <MRL | <MRL | 0 | No PFAS detected |
| Awa Buckhorn Plant | CA0310012 | Sutter Creek | 8,791 | <MRL | <MRL | 0 | No PFAS detected |
| Awa, Ione | CA0310002 | Sutter Creek | 7,227 | <MRL | <MRL | 0 | No PFAS detected |
| Awa, Tanner | CA0310003 | Sutter Creek | 4,940 | <MRL | <MRL | 0 | No PFAS detected |
| Azusa Light And Water | CA1910007 | Azusa | 110,044 | 7.7 | 5.8 | 0 | PFOA 1–3 × its limit |
| Bakersfield, City Of | CA1510031 | San Jose | 171,108 | <MRL | 8.4 | 0.89 | PFOS 1–3 × its limit |
| Bakman Water Company | CA1010001 | Fresno | 17,393 | <MRL | <MRL | 0 | No PFAS detected |
| Bakman Water-Rolling Hills | CA2010009 | Fresno | 1,107 | <MRL | <MRL | 0 | No PFAS detected |
| Banning, City Of | CA3310006 | Banning | 31,680 | <MRL | <MRL | 0 | Other PFAS detected |
| Bar-Len Mwc | CA3600025 | Barstow | 126 | <MRL | <MRL | 0 | No PFAS detected |
| Barona | 090600119 | Lakeside | 6,000 | <MRL | <MRL | 0 | Other PFAS detected |
| Beale Air Force Base | CA5810700 | Beale Afb | 2,000 | <MRL | <MRL | 0 | No PFAS detected |
| Bear Valley Csd | CA1510038 | Tehachapi | 5,592 | 5.7 | <MRL | 0 | PFOA 1–3 × its limit |
| Beaumont Cherry Valley Wd | CA3310002 | Beaumont | 66,841 | <MRL | <MRL | 0 | No PFAS detected |
| Bella Vista Water District | CA4510014 | Redding | 18,767 | <MRL | <MRL | 0 | No PFAS detected |
| Bellflower - Somerset Mwc | CA1910013 | Bellflower | 46,300 | <MRL | 17 | 0.51 | PFOS ≥ 3 × its limit |
| Bellflower Municipal Water System | CA1910018 | Rosemead | 6,032 | 7.6 | 32.6 | 0.56 | PFOS ≥ 3 × its limit |
| Beverly Hills-City, Water Dept. | CA1910156 | Beverly Hills | 39,922 | <MRL | <MRL | 0 | No PFAS detected |
| Big Bear City Csd | CA3610008 | Big Bear City | 12,738 | 4.5 | 9.9 | 3.605 | Hazard Index ≥ 3 × its limit |
| Big Bear Lake Dwp - Big Bear System | CA3610044 | Big Bear Lake | 26,164 | 5.5 | 6.1 | 0.66 | PFOS 1–3 × its limit |
| Bishop, City Of | CA1410001 | Bishop | 3,819 | <MRL | <MRL | 0 | No PFAS detected |
| Blue Lake Springs Mut Wtr | CA0510009 | Arnold | 4,822 | <MRL | <MRL | 0 | No PFAS detected |
| Blue Lake, City Of | CA1210002 | Blue Lake | 1,172 | <MRL | <MRL | 0 | No PFAS detected |
| Blythe - City Of | CA3310003 | Blythe | 9,735 | <MRL | <MRL | 0 | No PFAS detected |
| Bolinas Community Pud | CA2110005 | Bolinas | 1,937 | <MRL | <MRL | 0 | No PFAS detected |
| Borrego Wd | CA3710036 | Borrego Springs | 3,429 | <MRL | <MRL | 0 | No PFAS detected |
| Brawley, City Of | CA1310001 | Brawley | 26,862 | <MRL | <MRL | 0 | No PFAS detected |
| Brentwood | CA0710004 | Brentwood | 64,513 | <MRL | <MRL | 0 | No PFAS detected |
| Brooktrails Township Csd | CA2310009 | Willits | 3,632 | <MRL | <MRL | 0 | No PFAS detected |
| Burbank-City, Water Dept. | CA1910179 | Burbank | 106,146 | <MRL | <MRL | 0 | Other PFAS detected |
| Butte-Glenn Community College Dist | CA0400070 | Oroville | 18,000 | <MRL | <MRL | 0 | No PFAS detected |
| Cabrillo College | CA4400753 | Aptos | 12,000 | <MRL | <MRL | 0 | No PFAS detected |
| Cal Am - Antelope | CA3410031 | Sacramento | 35,617 | <MRL | <MRL | 0 | No PFAS detected |
| Cal Am - Arden | CA3410045 | Sacramento | 4,178 | 6 | 6 | 0.79 | PFOA 1–3 × its limit |
| Cal Am - Bass Lake | CA2010003 | Sacramento | 3,066 | <MRL | <MRL | 0 | Other PFAS detected |
| Cal Am - Fruitridge Vista | CA3410023 | Sacramento | 16,075 | <MRL | <MRL | 0 | No PFAS detected |
| Cal Am - Lincoln Oaks | CA3410013 | Sacramento | 48,105 | <MRL | <MRL | 0 | Other PFAS detected |
| Cal Am - Meadowbrook | CA2410008 | Sacramento | 5,723 | <MRL | 8.3 | 0 | PFOS 1–3 × its limit |
| Cal Am - Oakhurst | CA2010007 | Sacramento | 3,710 | <MRL | <MRL | 0 | No PFAS detected |
| Cal Am - Parkway | CA3410017 | Sacramento | 50,646 | 4.3 | 14.7 | 0.98 | PFOS ≥ 3 × its limit |
| Cal Am - Suburban Rosemont | CA3410010 | Sacramento | 54,893 | 8.2 | 13.4 | 1.09 | PFOS ≥ 3 × its limit |
| Cal Am - West Placer | CA3110150 | Sacramento | 9,547 | <MRL | <MRL | 0 | No PFAS detected |
| Cal Am Water Company - Monterey | CA2710004 | Pacific Grove | 128,928 | 8.1 | 7.3 | 0.877 | PFOA 1–3 × its limit |
| Cal American Water Co | CA5610040 | Rosemead | 66,809 | <MRL | <MRL | 0 | No PFAS detected |
| Cal-Am Water Company - Duarte | CA1910186 | Rosemead | 24,767 | <MRL | 5.1 | 0 | PFOS 1–3 × its limit |
| Cal-Am Water Company - East Pasadena | CA1910020 | Rosemead | 9,963 | <MRL | <MRL | 0 | No PFAS detected |
| Cal-Am Water Coronado | CA3710001 | Imperial Beach | 106,000 | <MRL | <MRL | 0 | No PFAS detected |
| Cal-Water Service Co.-Chico | CA0410002 | San Jose | 110,473 | 6.8 | 22.5 | 2.215 | PFOS ≥ 3 × its limit |
| Cal-Water Service Co.-Marysville | CA5810001 | San Jose | 12,888 | <MRL | <MRL | 0 | No PFAS detected |
| Cal-Water Service Co.-Oroville | CA0410005 | San Jose | 11,047 | <MRL | <MRL | 0 | Other PFAS detected |
| Cal-Water Service Co.-Willows | CA1110003 | San Jose | 7,107 | <MRL | <MRL | 0 | No PFAS detected |
| Cal/Am Water Company - Baldwin Hills | CA1910052 | Rosemead | 20,724 | <MRL | <MRL | 0 | No PFAS detected |
| Cal/Am Water Company - San Marino | CA1910139 | Rosemead | 48,065 | <MRL | <MRL | 0 | Other PFAS detected |
| Calaveras Pud | CA0510002 | San Andreas | 6,286 | <MRL | <MRL | 0 | No PFAS detected |
| Calexico, City Of | CA1310002 | Calexico | 40,357 | <MRL | <MRL | 0 | No PFAS detected |
| Calif State Polytechnical Univ - Pomona | CA1910022 | Pomona | 2,668 | <MRL | <MRL | 0.563 | Hazard Index below its limit |
| California City, City Of | CA1510032 | California City | 14,198 | <MRL | <MRL | 0 | No PFAS detected |
| California Institution For Men | CA3610850 | Chino | 10,667 | <MRL | <MRL | 0 | No PFAS detected |
| California Mens Colony | CA4010830 | San Luis Obispo | 15,000 | <MRL | <MRL | 0 | No PFAS detected |
| California Rehabilitation Center - Norco | CA3310800 | Norco | 750 | <MRL | <MRL | 0.35 | Hazard Index below its limit |
| California State Fair | CA3410026 | Sacramento | 80 | <MRL | 14 | 0.002 | PFOS ≥ 3 × its limit |
| California State Prison - Solano | CA4810800 | Vacaville | 3,882 | <MRL | <MRL | 0 | No PFAS detected |
| California State University Fresno | CA1010339 | Fresno | 1,500 | 12 | <MRL | 0.006 | PFOA ≥ 3 × its limit |
| California Water Service - Bear Gulch | CA4110006 | San Jose | 60,382 | <MRL | <MRL | 0 | No PFAS detected |
| California Water Service - Livermore | CA0110003 | San Jose | 60,414 | 4.8 | 12 | 0.982 | PFOS ≥ 3 × its limit |
| California Water Service - San Carlos | CA4110007 | San Jose | 34,801 | <MRL | <MRL | 0 | No PFAS detected |
| California Water Service - San Mateo | CA4110008 | San Jose | 103,536 | <MRL | <MRL | 0 | No PFAS detected |
| California Water Service - Stockton | CA3910001 | San Jose | 182,775 | <MRL | 5.2 | 0 | PFOS 1–3 × its limit |
| California Water Service Co - Westlake | CA5610016 | San Jose | 19,544 | <MRL | <MRL | 0 | No PFAS detected |
| California Water Service Co. - Dixon | CA4810002 | San Jose | 10,623 | <MRL | <MRL | 0 | No PFAS detected |
| California Water Service Co. - Dominguez | CA1910033 | San Jose | 149,490 | <MRL | <MRL | 0.35 | Hazard Index below its limit |
| California Water Service Co. - Ela | CA1910036 | San Jose | 142,140 | <MRL | 8.6 | 0.002 | PFOS 1–3 × its limit |
| California Water Service Co. - Herm/Redo | CA1910134 | San Jose | 100,072 | <MRL | <MRL | 0 | No PFAS detected |
| California Water Service Co. - Palos Ver | CA1910104 | San Jose | 70,830 | <MRL | <MRL | 0 | No PFAS detected |
| California Water Service Co.-Lancaster | CA1910010 | San Jose | 1,416 | <MRL | <MRL | 0 | No PFAS detected |
| California Water Service Co.-Travis Afb | CA4810701 | San Jose | 18,111 | <MRL | <MRL | 0 | No PFAS detected |
| California Water Service-S San Francisco | CA4110009 | San Jose | 62,609 | <MRL | <MRL | 0 | No PFAS detected |
| California-American Geyserville (Puc) | CA4910024 | Sacramento | 1,050 | <MRL | <MRL | 0 | No PFAS detected |
| California-American Larkfield (Puc) | CA4910023 | Sacramento | 7,911 | <MRL | <MRL | 0 | No PFAS detected |
| Calipatria State Prison | CA1310800 | Imperial | 4,800 | <MRL | <MRL | 0 | No PFAS detected |
| Calistoga, City Of | CA2810002 | Calistoga | 5,610 | 6.4 | 12.2 | 0 | PFOS ≥ 3 × its limit |
| Camarillo Water Dept | CA5610019 | Camarillo | 47,701 | <MRL | <MRL | 0 | No PFAS detected |
| Cambria Comm Services Dist | CA4010014 | Cambria | 6,038 | <MRL | <MRL | 0 | No PFAS detected |
| Camp Pendleton (North) | CA3710700 | Camp Pendleton | 11,576 | <MRL | <MRL | 0 | Other PFAS detected |
| Camp Pendleton (South) | CA3710702 | Camp Pendleton | 44,555 | <MRL | <MRL | 0.542 | Hazard Index below its limit |
| Camrosa Water District | CA5610063 | Camarillo | 32,700 | <MRL | 17 | 0 | PFOS ≥ 3 × its limit |
| Canada Woods Wc | CA2702588 | Carmel | 356 | <MRL | <MRL | 0 | No PFAS detected |
| Carlsbad Mwd | CA3710005 | Carlsbad | 96,371 | <MRL | <MRL | 0 | No PFAS detected |
| Carmichael Water District | CA3410004 | Carmichael | 41,193 | <MRL | <MRL | 0 | Other PFAS detected |
| Carpinteria Valley Water District | CA4210001 | Carpinteria | 16,356 | <MRL | <MRL | 0 | No PFAS detected |
| Casitas Municipal Water Dist | CA5610024 | Oak View | 11,005 | <MRL | <MRL | 0 | No PFAS detected |
| Castroville Community Services District | CA2710005 | Castroville | 7,515 | <MRL | <MRL | 0 | No PFAS detected |
| Cci - Tehachapi | CA1510800 | Tehachapi | 2,993 | <MRL | <MRL | 0 | No PFAS detected |
| Ccwd - Copper Cove | CA0510017 | San Andreas | 5,187 | <MRL | <MRL | 0 | No PFAS detected |
| Ccwd - Ebbetts Pass | CA0510016 | San Andreas | 11,545 | <MRL | <MRL | 0 | No PFAS detected |
| Ccwd - Jenny Lind | CA0510006 | San Andreas | 9,861 | <MRL | <MRL | 0 | No PFAS detected |
| Cdcr-High Desert State Prison | CA1805004 | Susanville | 3,857 | <MRL | <MRL | 0 | No PFAS detected |
| Centerville C.S.D. | CA4510011 | Redding | 4,244 | <MRL | <MRL | 0 | No PFAS detected |
| Centinela State Prison | CA1310801 | Imperial | 4,100 | <MRL | <MRL | 0 | No PFAS detected |
| Ceres, City Of | CA5010028 | Ceres | 54,513 | 12 | 24 | 0.57 | PFOS ≥ 3 × its limit |
| Cerritos - City, Water Dept. | CA1910019 | Cerritos | 46,851 | <MRL | 4.8 | 0 | PFOS 1–3 × its limit |
| Channel Islands Beach Csd | CA5610039 | Oxnard | 5,011 | <MRL | <MRL | 0 | No PFAS detected |
| China Lake Naval Air Weapons Station | CA1510703 | China Lake | 1,000 | <MRL | <MRL | 0 | No PFAS detected |
| Chino Hills, City Of | CA3610036 | Chino Hills | 76,314 | <MRL | <MRL | 0 | No PFAS detected |
| Chino, City Of | CA3610012 | Chino | 90,187 | <MRL | <MRL | 0 | No PFAS detected |
| Chowchilla City Water Dept | CA2010001 | Chowchilla | 13,916 | 4.5 | <MRL | 0 | PFOA 1–3 × its limit |
| Chuckawalla Valley State Prison | CA3310802 | Blythe | 4,331 | <MRL | <MRL | 0 | No PFAS detected |
| Chukchansi Gold Resort | 090605163 | Coarsegold | 5,000 | 4.8 | <MRL | 0.006 | PFOA 1–3 × its limit |
| Citrus Heights Water District | CA3410006 | Citrus Heights | 67,818 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Alhambra | CA1910001 | Alhambra | 80,279 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Alturas | CA2510001 | Alturas | 2,715 | <MRL | <MRL | 0.35 | Hazard Index below its limit |
| City Of Anaheim | CA3010001 | Anaheim | 350,254 | 10.1 | 29 | 1.09 | PFOS ≥ 3 × its limit |
| City Of Anderson | CA4510001 | Anderson | 11,323 | — | — | — | No PFAS detected |
| City Of Antioch | CA0710001 | Antioch | 116,781 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Arcadia | CA1910003 | Arcadia | 54,236 | <MRL | 10 | 0.48 | PFOS 1–3 × its limit |
| City Of Arroyo Grande Utilities Division | CA4010001 | Arroyo Grande | 17,963 | 5.8 | 6.8 | 0.555 | PFOS 1–3 × its limit |
| City Of Atwater | CA2410001 | Atwater | 29,479 | 33 | 45 | 5.904 | PFOS ≥ 3 × its limit |
| City Of Bell Gardens | CA1910108 | Bell Gardens | 11,413 | 14 | 23 | 0.393 | PFOS ≥ 3 × its limit |
| City Of Benicia | CA4810001 | Benicia | 27,131 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| City Of Brea | CA3010002 | Brea | 47,454 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Buellton Water Division | CA4210018 | Buellton | 5,091 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Buena Park | CA3010003 | Buena Park | 82,667 | <MRL | 6.8 | 0.39 | PFOS 1–3 × its limit |
| City Of Burlingame | CA4110003 | Burlingame | 32,453 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Clovis | CA1010003 | Clovis | 133,118 | 18 | 41 | 1.013 | PFOS ≥ 3 × its limit |
| City Of Colusa | CA0610002 | Colusa | 6,675 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Corning | CA5210001 | Corning | 8,244 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Crescent City | CA0810001 | Crescent City | 15,202 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Cupertino | CA4310018 | San Jose | 16,336 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Daly City | CA4110013 | Daly City | 102,593 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Davis | CA5710001 | Davis | 67,826 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Dixon | CA4810009 | Dixon | 12,540 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Dos Palos | CA2410002 | Dos Palos | 7,452 | <MRL | <MRL | 0 | No PFAS detected |
| City Of East Palo Alto | CA4110024 | East Palo Alto | 29,519 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Fairfield | CA4810003 | Fairfield | 120,720 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Fountain Valley | CA3010069 | Fountain Valley | 56,747 | <MRL | <MRL | 0.35 | Hazard Index below its limit |
| City Of Fowler | CA1010006 | Fowler | 7,448 | <MRL | <MRL | 0 | Other PFAS detected |
| City Of Fresno | CA1010007 | Fresno | 545,970 | 16 | 30 | 3.432 | PFOS ≥ 3 × its limit |
| City Of Fullerton | CA3010010 | Fullerton | 140,054 | 10.8 | 13.3 | 0.623 | PFOS ≥ 3 × its limit |
| City Of Garden Grove | CA3010062 | Garden Grove | 174,226 | 8.1 | 19 | 0.96 | PFOS ≥ 3 × its limit |
| City Of Gilroy | CA4310004 | Gilroy | 59,426 | 8 | 5.8 | 0.355 | PFOA 1–3 × its limit |
| City Of Grass Valley | CA2910001 | Grass Valley | 4,947 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Gridley | CA0410004 | Gridley | 7,269 | <MRL | 10.5 | 2.27 | PFOS 1–3 × its limit |
| City Of Grover Beach Public Works Dept | CA4010004 | Grover Beach | 12,701 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Gustine | CA2410003 | Gustine | 6,138 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Hayward | CA0110006 | Hayward | 162,954 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Huntington Beach | CA3010053 | Huntington Beach | 201,000 | <MRL | 6.1 | 0.33 | PFOS 1–3 × its limit |
| City Of Industry Waterworks Systems | CA1910029 | La Puente | 6,151 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Jackson | CA0310001 | Jackson | 5,079 | <MRL | <MRL | 0 | No PFAS detected |
| City Of La Habra | CA3010018 | La Habra | 61,202 | <MRL | <MRL | 0 | No PFAS detected |
| City Of La Palma | CA3010100 | La Palma | 15,948 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Lathrop | CA3910015 | Lathrop | 38,596 | <MRL | 17 | 0.352 | PFOS ≥ 3 × its limit |
| City Of Lincoln | CA3110004 | Lincoln | 56,268 | <MRL | 4.3 | 0.85 | PFOS 1–3 × its limit |
| City Of Live Oak | CA5110001 | Live Oak | 9,687 | <MRL | <MRL | 0 | Other PFAS detected |
| City Of Livermore | CA0110011 | Livermore | 38,892 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Livingston | CA2410004 | Livingston | 14,894 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Los Banos | CA2410005 | Los Banos | 48,896 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Madera | CA2010002 | Madera | 66,560 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Martinez | CA0710006 | Martinez | 31,015 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Merced | CA2410009 | Merced | 96,073 | 6.1 | 8.9 | 1.5 | PFOS 1–3 × its limit |
| City Of Millbrae | CA4110018 | Millbrae | 22,795 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Milpitas | CA4310005 | Milpitas | 81,915 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Modesto - Salida | CA5010005 | Modesto | 14,576 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Morgan Hill | CA4310006 | Morgann Hill | 47,374 | <MRL | <MRL | 0.33 | Hazard Index below its limit |
| City Of Mountain House | CA3910027 | Mountain House | 26,400 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Mountain View | CA4310007 | Mountain View | 81,340 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Newman-Water Department | CA5010013 | Newman | 12,389 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Newport Beach | CA3010023 | Newport Beach | 69,520 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Orange | CA3010027 | Orange | 120,770 | 9.3 | 17 | 1.022 | PFOS ≥ 3 × its limit |
| City Of Orange Cove | CA1010023 | Orange Cove | 9,525 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Orland | CA1110001 | Orland | 8,298 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Palo Alto | CA4310009 | Palo Alto | 67,658 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Parlier | CA1010025 | Parlier | 14,576 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Paso Robles Water Division | CA4010007 | Paso Robles | 31,176 | 6.3 | <MRL | 0.524 | PFOA 1–3 × its limit |
| City Of Pittsburg | CA0710008 | Pittsburg | 62,500 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Pleasanton | CA0110008 | Pleasanton | 76,689 | 5.1 | 26 | 2.203 | PFOS ≥ 3 × its limit |
| City Of Red Bluff | CA5210004 | Red Bluff | 14,286 | 7.4 | <MRL | 0 | PFOA 1–3 × its limit |
| City Of Redding | CA4510005 | Redding | 90,254 | 16.2 | 12.6 | 0.894 | PFOA ≥ 3 × its limit |
| City Of Redwood City | CA4110022 | Redwood City | 90,043 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Rio Vista | CA4810004 | Rio Vista | 11,206 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Roseville | CA3110008 | Roseville | 165,736 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Sacramento Main | CA3410020 | Sacramento | 527,979 | 17.3 | 41.4 | 1.913 | PFOS ≥ 3 × its limit |
| City Of San Bruno | CA4110023 | San Bruno | 42,631 | <MRL | <MRL | 0 | No PFAS detected |
| City Of San Clemente | CA3010036 | San Clemente | 51,545 | <MRL | <MRL | 0 | No PFAS detected |
| City Of San Jose - Evg/Edv/Coy | CA4310020 | San Jose | 99,783 | <MRL | <MRL | 0 | No PFAS detected |
| City Of San Jose - Nsj/Alviso | CA4310019 | San Jose | 48,082 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Sanger | CA1010029 | Sanger | 26,357 | 5.6 | 6.7 | 0 | PFOS 1–3 × its limit |
| City Of Santa Ana | CA3010038 | Santa Ana | 316,184 | 8.9 | 14.2 | 0.84 | PFOS ≥ 3 × its limit |
| City Of Santa Barbara Water Department | CA4210010 | Santa Barbara | 93,334 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Santa Clara | CA4310012 | Santa Clara | 134,587 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Santa Maria Utilities Department | CA4210011 | Santa Maria | 112,208 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Santa Paula | CA5610011 | Santa Paula | 31,786 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Seal Beach | CA3010041 | Seal Beach | 24,937 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Shasta Lake | CA4510006 | Shasta Lake | 10,371 | <MRL | <MRL | 0 | No PFAS detected |
| City Of South Pasadena | CA1910154 | South Pasadena | 25,329 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Stockton | CA3910012 | Stockton | 192,702 | 6.7 | 28 | 0.003 | PFOS ≥ 3 × its limit |
| City Of Sunnyvale | CA4310014 | Sunnyvale | 157,566 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Susanville | CA1810001 | Susanville | 7,811 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Thousand Oaks Water Department | CA5610020 | Thousand Oaks | 54,770 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Tustin | CA3010046 | Tustin | 65,143 | <MRL | 4.2 | 0.35 | PFOS 1–3 × its limit |
| City Of Vacaville | CA4810008 | Elmira | 99,650 | 5.1 | 10 | 0.922 | PFOS 1–3 × its limit |
| City Of Vallejo | CA4810007 | Vallejo | 121,420 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Vallejo-Lakes System | CA4810021 | Vallejo | 2,800 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Waterford | CA5010006 | Waterford | 8,788 | <MRL | <MRL | 0 | No PFAS detected |
| City Of West Sacramento | CA5710003 | West Sacramento | 55,991 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Westminster | CA3010064 | Westminster | 93,591 | <MRL | 5.3 | 0.5 | PFOS 1–3 × its limit |
| City Of Wheatland | CA5810004 | Wheatland | 4,124 | <MRL | 11 | 0.92 | PFOS 1–3 × its limit |
| City Of Williams | CA0610004 | Williams | 5,538 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Winters | CA5710005 | Winters | 7,115 | <MRL | <MRL | 0.42 | Hazard Index below its limit |
| City Of Woodland | CA5710006 | Woodland | 61,462 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Yuba City | CA5110002 | Yuba City | 70,256 | <MRL | <MRL | 0 | No PFAS detected |
| Clear Creek Csd-Anderson | CA4510016 | Anderson | 8,900 | <MRL | <MRL | 0 | No PFAS detected |
| Cloverdale, City Of | CA4910002 | Cloverdale | 8,710 | <MRL | <MRL | 0 | No PFAS detected |
| Coachella Vwd: Cove Community | CA3310001 | Palm Desert | 270,000 | <MRL | <MRL | 0 | No PFAS detected |
| Coachella Vwd: I.D. No. 8 | CA3310048 | Palm Desert | 4,700 | <MRL | <MRL | 0 | No PFAS detected |
| Coachella Water Authority | CA3310007 | Coachella | 43,590 | <MRL | <MRL | 0 | No PFAS detected |
| Coalinga-City | CA1010004 | Coalinga | 17,277 | <MRL | <MRL | 0 | No PFAS detected |
| Coastside County Water District | CA4110011 | Half Moon Bay | 19,033 | <MRL | <MRL | 0 | No PFAS detected |
| Colton, City Of | CA3610014 | Colton | 46,525 | 5.9 | 18 | 0.513 | PFOS ≥ 3 × its limit |
| Colusa Southern System | 090605047 | Colusa | 3,474 | <MRL | <MRL | 0 | No PFAS detected |
| Commerce-City, Water Dept. | CA1910050 | San Jose | 3,598 | 9.3 | <MRL | 0.005 | PFOA 1–3 × its limit |
| Compton-City, Water Dept. | CA1910026 | Compton | 90,986 | 4.9 | 17 | 0.41 | PFOS ≥ 3 × its limit |
| Contra Costa Water District | CA0710003 | Concord | 210,500 | <MRL | <MRL | 0 | No PFAS detected |
| Corcoran, City Of | CA1610004 | Corcoran | 22,808 | <MRL | <MRL | 0 | No PFAS detected |
| Corona, City Of | CA3310037 | Corona | 169,380 | <MRL | <MRL | 0.33 | Hazard Index below its limit |
| Correctional Training Facility - Soledad | CA2710850 | Soledad | 4,357 | <MRL | <MRL | 0 | No PFAS detected |
| Cotati, City Of | CA4910016 | Cotati | 7,290 | <MRL | <MRL | 0 | No PFAS detected |
| Cottonwood Water District | CA4510007 | Cottonwood | 3,316 | <MRL | <MRL | 0 | No PFAS detected |
| Covina-City, Water Dept. | CA1910127 | Covina | 33,300 | <MRL | <MRL | 0 | No PFAS detected |
| Crescenta Valley Cwd | CA1910028 | La Crescenta | 28,162 | 5.1 | <MRL | 0.493 | PFOA 1–3 × its limit |
| Crestline Village Cwd - Division 10 | CA3610015 | Crestline | 11,650 | 4.5 | 5.2 | 2.462 | Hazard Index 1–3 × its limit |
| Csa 70 W-3 Hacienda | CA3600114 | San Bernardino | 611 | <MRL | <MRL | 0 | No PFAS detected |
| Cucamonga Valley Water District | CA3610018 | Rancho Cucuamonga | 213,375 | <MRL | <MRL | 0 | No PFAS detected |
| Cutler Pud | CA5410001 | Cutler | 6,200 | <MRL | <MRL | 0 | No PFAS detected |
| Cws - Bakersfield | CA1510003 | San Jose | 268,129 | 9.1 | 14 | 0.73 | PFOS ≥ 3 × its limit |
| Cws - North Garden | CA1510055 | San Jose | 27,634 | <MRL | 4.6 | 0 | PFOS 1–3 × its limit |
| Cws - Selma | CA1010024 | San Jose | 25,651 | <MRL | <MRL | 0 | No PFAS detected |
| Cws - Visalia | CA5410016 | San Jose | 153,522 | 4.2 | 6.9 | 0.002 | PFOS 1–3 × its limit |
| Cwsc King City | CA2710009 | San Jose | 14,046 | <MRL | <MRL | 0 | No PFAS detected |
| Cwsc Las Lomas | CA2710013 | San Jose | 2,132 | <MRL | <MRL | 0 | No PFAS detected |
| Cwsc Los Altos Suburban | CA4310001 | San Jose | 63,559 | <MRL | <MRL | 0.35 | Hazard Index below its limit |
| Cwsc Oak Hills | CA2710019 | San Jose | 3,214 | <MRL | <MRL | 0 | No PFAS detected |
| Cwsc Salinas | CA2710010 | San Jose | 114,286 | <MRL | <MRL | 0 | No PFAS detected |
| Cwsc Salinas Hills | CA2710012 | San Jose | 7,733 | <MRL | <MRL | 0 | No PFAS detected |
| Del Mar, City Of | CA3710004 | Del Mar | 3,950 | <MRL | <MRL | 0 | No PFAS detected |
| Delano, City Of | CA1510005 | Delano | 51,428 | <MRL | <MRL | 0 | No PFAS detected |
| Delhi Cwd | CA2410006 | Delhi | 7,784 | <MRL | 7.3 | 0.8 | PFOS 1–3 × its limit |
| Denair Community Services District | CA5010021 | Denair | 5,093 | <MRL | <MRL | 0 | No PFAS detected |
| Desert Water Agency | CA3310005 | Palm Springs | 75,588 | <MRL | <MRL | 0 | No PFAS detected |
| Diablo Water District | CA0710007 | Oakley | 47,158 | <MRL | <MRL | 0 | No PFAS detected |
| Dinuba, City Of | CA5410002 | Dinuba | 27,641 | <MRL | <MRL | 0 | No PFAS detected |
| Downey - City, Water Dept. | CA1910034 | Downey | 110,556 | 15 | 44 | 0.894 | PFOS ≥ 3 × its limit |
| Dry Creek Rancheria | 090600127 | Geyserville | 2,200 | <MRL | <MRL | 0 | No PFAS detected |
| Dublin San Ramon Services District | CA0110009 | Pleasanton | 98,776 | <MRL | <MRL | 0 | No PFAS detected |
| Earlimart Pud | CA5410021 | Earlimart | 7,679 | <MRL | <MRL | 0 | No PFAS detected |
| East Bay Mud | CA0110005 | Oakland | 1,468,000 | <MRL | <MRL | 0 | Other PFAS detected |
| East Niles Csd | CA1510006 | Bakersfield | 32,517 | <MRL | <MRL | 0 | No PFAS detected |
| East Valley Water District | CA3610064 | Highland | 108,600 | 9 | 12 | 0.404 | PFOS ≥ 3 × its limit |
| Eastern Municipal Wd | CA3310009 | Perris | 659,923 | <MRL | <MRL | 0 | No PFAS detected |
| Edwards Afb - Main Base | CA1510701 | Edwards Afb | 661 | <MRL | <MRL | 0 | No PFAS detected |
| El Centro, City Of | CA1310004 | El Centro | 44,124 | <MRL | <MRL | 0 | No PFAS detected |
| El Dorado Id - Main | CA0910001 | Placerville | 128,408 | <MRL | <MRL | 0 | Other PFAS detected |
| El Monte-City, Water Dept. | CA1910038 | El Monte | 23,000 | <MRL | 4.4 | 0.32 | PFOS 1–3 × its limit |
| El Segundo-City, Water Dept. | CA1910040 | El Segundo | 16,777 | <MRL | <MRL | 0 | No PFAS detected |
| El Toro Water District | CA3010079 | Lake Forest | 53,415 | <MRL | <MRL | 0 | Other PFAS detected |
| Elk Grove Water District | CA3410008 | Elk Grove | 44,065 | <MRL | <MRL | 0.38 | Hazard Index below its limit |
| Elsinore Valley Mwd | CA3310012 | Lake Elsinore | 169,455 | <MRL | <MRL | 0 | Other PFAS detected |
| Escalon, City Of | CA3910003 | Escalon | 7,232 | <MRL | <MRL | 0 | No PFAS detected |
| Escondido, City Of | CA3710006 | Escondido | 137,044 | <MRL | <MRL | 0 | No PFAS detected |
| Estero Municipal Improvement District | CA4110021 | Foster City | 36,556 | <MRL | <MRL | 0 | No PFAS detected |
| Eureka, City Of | CA1210004 | Eureka | 27,078 | <MRL | <MRL | 0 | No PFAS detected |
| Exeter, City Of | CA5410003 | Exeter | 11,169 | <MRL | <MRL | 0 | No PFAS detected |
| Fair Oaks Water District | CA3410009 | Fair Oaks | 36,226 | <MRL | <MRL | 0 | No PFAS detected |
| Fallbrook Pud | CA3710008 | Fallbrook | 35,237 | <MRL | <MRL | 0 | No PFAS detected |
| Farm Mutual W.C. (The) | CA3310046 | Wildomar | 4,026 | 4.2 | 4.3 | 0.51 | PFOS 1–3 × its limit |
| Farmersville, City Of | CA5410004 | Farmersville | 10,243 | <MRL | <MRL | 0 | No PFAS detected |
| Fillmore Water Dept | CA5610002 | Fillmore | 16,419 | <MRL | <MRL | 0 | No PFAS detected |
| Firebaugh City | CA1010005 | Firebaugh | 8,424 | <MRL | <MRL | 0 | No PFAS detected |
| Florin County Water District | CA3410033 | Sacramento | 7,831 | 11.8 | 6.6 | 0.55 | PFOA 1–3 × its limit |
| Folsom State Prison | CA3410032 | Represa | 7,399 | <MRL | 6.8 | 0 | PFOS 1–3 × its limit |
| Folsom, City Of - Ashland | CA3410030 | Folsom | 3,300 | <MRL | <MRL | 0 | No PFAS detected |
| Folsom, City Of - Main | CA3410014 | Folsom | 80,969 | <MRL | <MRL | 0 | No PFAS detected |
| Foresthill Public Utility Dist | CA3110003 | Foresthill | 6,811 | <MRL | <MRL | 0 | No PFAS detected |
| Fort Bragg, City Of | CA2310001 | Fort Bragg | 7,117 | <MRL | <MRL | 0 | No PFAS detected |
| Fortuna, City Of | CA1210006 | Fortuna | 12,133 | <MRL | <MRL | 0 | No PFAS detected |
| Galt, City Of | CA3410011 | Galt | 26,536 | <MRL | <MRL | 0 | No PFAS detected |
| Georgetown Divide Pud | CA0910013 | Georgetown | 9,434 | <MRL | <MRL | 0 | No PFAS detected |
| Glen Helen Water System | CA3600108 | San Bernardino | 5,900 | <MRL | <MRL | 0.62 | Hazard Index below its limit |
| Glendale-City, Water Dept. | CA1910043 | Glendale | 192,212 | 14.8 | 15.8 | 0.556 | PFOS ≥ 3 × its limit |
| Glendora-City, Water Dept. | CA1910044 | Glendora | 44,411 | <MRL | <MRL | 0 | No PFAS detected |
| Golden Hills Csd | CA1510045 | Tehachapi | 9,857 | 18.6 | 7.8 | 0.553 | PFOA ≥ 3 × its limit |
| Golden State Water Co - Apple Vly South | CA3610107 | Apple Valley | 6,247 | <MRL | <MRL | 0 | No PFAS detected |
| Golden State Water Co - Arden Water Serv | CA3410003 | Rancho Cordova | 5,679 | <MRL | <MRL | 0 | No PFAS detected |
| Golden State Water Co - Barstow | CA3610043 | Apple Valley | 32,445 | 5.7 | <MRL | 0.5 | PFOA 1–3 × its limit |
| Golden State Water Co - Wrightwood | CA3610047 | Apple Valley | 4,153 | <MRL | <MRL | 0.004 | Hazard Index below its limit |
| Golden State Water Co. - Cordova | CA3410015 | Rancho Cordova | 47,366 | <MRL | <MRL | 0 | No PFAS detected |
| Golden State Water Co.-Clearlake System | CA1710002 | Rancho Cordova | 4,623 | <MRL | <MRL | 0 | No PFAS detected |
| Golden State Water Company - Bay Point | CA0710002 | Rancho Cordova | 23,765 | <MRL | <MRL | 0 | No PFAS detected |
| Golden State Water Company - Los Osos | CA4010017 | Santa Maria | 5,942 | <MRL | <MRL | 0.882 | Hazard Index below its limit |
| Golden State Water Company - Nipomo | CA4010018 | Rancho Cordova | 4,512 | <MRL | <MRL | 0 | Other PFAS detected |
| Golden State Water Company - Orcutt | CA4210016 | Santa Maria | 34,267 | <MRL | <MRL | 0 | No PFAS detected |
| Golden State Water Company - Simi Valley | CA5610059 | Rancho Cordova | 45,086 | <MRL | <MRL | 0 | No PFAS detected |
| Golden State Wc - Cowan Heights | CA3010047 | Anaheim | 7,006 | <MRL | <MRL | 0 | Other PFAS detected |
| Golden State Wc - Placentia/Yorba Linda | CA3010035 | Anaheim | 50,804 | 6 | 6.5 | 0.363 | PFOS 1–3 × its limit |
| Golden State Wc - West Orange County | CA3010022 | Anaheim | 114,693 | 8.1 | 16 | 0.93 | PFOS ≥ 3 × its limit |
| Goleta Water District | CA4210004 | Goleta | 85,535 | <MRL | <MRL | 0 | Other PFAS detected |
| Gonzales, City Of | CA2710007 | Gonzales | 8,333 | <MRL | <MRL | 0 | No PFAS detected |
| Graton Resort And Casino | 090605174 | Rohnert Park | 10,127 | <MRL | <MRL | 0 | No PFAS detected |
| Great Oaks Wc Inc | CA4310022 | San Jose | 112,582 | <MRL | 4.6 | 0.8 | PFOS 1–3 × its limit |
| Greenfield County Wd | CA1510024 | Bakersfield | 11,590 | <MRL | <MRL | 0 | No PFAS detected |
| Greenfield, City Of | CA2710008 | Greenfield | 18,967 | <MRL | <MRL | 0 | No PFAS detected |
| Groveland Community Serv Dist | CA5510009 | Groveland | 3,400 | <MRL | 4.9 | 0 | PFOS 1–3 × its limit |
| Gswc - Artesia | CA1910004 | Anaheim | 50,415 | <MRL | 13 | 0.34 | PFOS ≥ 3 × its limit |
| Gswc - Bell, Bell Gardens | CA1910011 | Anaheim | 55,050 | <MRL | 15 | 0.36 | PFOS ≥ 3 × its limit |
| Gswc - Calipatria | CA1310003 | San Dimas | 7,475 | <MRL | <MRL | 0 | No PFAS detected |
| Gswc - Claremont | CA1910024 | San Dimas | 39,776 | 12.9 | 10.4 | 0.372 | PFOA ≥ 3 × its limit |
| Gswc - Culver City | CA1910030 | Santa Fe Springs | 38,233 | <MRL | <MRL | 0 | No PFAS detected |
| Gswc - Florence/Graham | CA1910077 | Anaheim | 63,472 | <MRL | <MRL | 0 | No PFAS detected |
| Gswc - Hollydale | CA1910195 | Anaheim | 8,099 | <MRL | <MRL | 0 | Other PFAS detected |
| Gswc - Norwalk | CA1910098 | Anaheim | 43,167 | <MRL | <MRL | 0 | Other PFAS detected |
| Gswc - Southwest | CA1910155 | Hawthorne | 277,740 | <MRL | <MRL | 0 | No PFAS detected |
| Gswc - Willowbrook | CA1910072 | Anaheim | 10,793 | <MRL | <MRL | 0 | No PFAS detected |
| Gswc-San Dimas | CA1910142 | San Dimas | 56,564 | <MRL | 4.6 | 0 | PFOS 1–3 × its limit |
| Gswc-South Arcadia | CA1910212 | San Dimas | 27,430 | 5.5 | 22 | 0.7 | PFOS ≥ 3 × its limit |
| Gswc-South San Gabriel | CA1910223 | San Dimas | 26,451 | <MRL | <MRL | 0 | Other PFAS detected |
| Guadalupe Valley Mid | CA4110005 | Brisbane | 1,455 | 9.6 | 8.3 | 0.34 | PFOA 1–3 × its limit |
| Guadalupe Water Department | CA4210003 | Guadalupe | 8,897 | <MRL | <MRL | 0 | No PFAS detected |
| Hanford, City Of | CA1610003 | Hanford | 62,127 | <MRL | <MRL | 0 | No PFAS detected |
| Hard Rock Fire Mountain Water System | 090605172 | Oroville | 9,500 | <MRL | <MRL | 0 | No PFAS detected |
| Hawthorne-City Water Dept. | CA1910047 | Yucaipa | 46,039 | <MRL | <MRL | 0 | No PFAS detected |
| Healdsburg, City Of | CA4910005 | Healdsburg | 10,972 | <MRL | <MRL | 0.452 | Hazard Index below its limit |
| Heber Public Utility District | CA1310007 | Heber | 7,312 | <MRL | <MRL | 0 | No PFAS detected |
| Helendale Community Service District | CA3610112 | Helendale | 6,347 | 13 | 23 | 1.463 | PFOS ≥ 3 × its limit |
| Helix Water District | CA3710010 | La Mesa | 277,918 | <MRL | <MRL | 0 | No PFAS detected |
| Hemet, City Of | CA3310016 | Hemet | 33,591 | <MRL | <MRL | 0 | No PFAS detected |
| Heritage Ranch Csd | CA4010012 | Paso Robles | 2,956 | <MRL | <MRL | 0 | No PFAS detected |
| Hesperia Wd | CA3610024 | Hesperia | 101,836 | 10.2 | 11.1 | 1.05 | PFOS 1–3 × its limit |
| Hi Desert Wd | CA3610073 | Yucca Valley | 26,660 | <MRL | <MRL | 0.3 | Hazard Index below its limit |
| Hidden Valley Lake Csd | CA1710015 | Hidden Valley Lake | 6,235 | <MRL | <MRL | 0 | No PFAS detected |
| Highlands Mutual Water Company | CA1710003 | Clearlake | 7,772 | <MRL | <MRL | 0 | No PFAS detected |
| Hilmar County Water District | CA2410012 | Hilmar | 5,504 | <MRL | <MRL | 0 | No PFAS detected |
| Hollister, City Of | CA3510001 | Hollister | 26,598 | <MRL | <MRL | 0 | No PFAS detected |
| Holtville, City Of | CA1310005 | Holtville | 6,355 | <MRL | <MRL | 0 | No PFAS detected |
| Hoopa Valley-Wide System | 090605126 | Hoopa | 3,500 | <MRL | <MRL | 0 | No PFAS detected |
| Hughson, City Of | CA5010008 | Hughson | 7,977 | <MRL | <MRL | 0 | No PFAS detected |
| Humboldt C.S.D. | CA1210009 | Cutten | 19,775 | <MRL | <MRL | 0 | No PFAS detected |
| Huntington Park-City, Water Dept. | CA1910049 | Huntington Park | 15,437 | 5.1 | 23 | 0.51 | PFOS ≥ 3 × its limit |
| Huron, City Of | CA1010044 | Huron | 7,306 | <MRL | <MRL | 0 | No PFAS detected |
| Imperial Valley College | CA1300549 | Imperial | 7,650 | <MRL | <MRL | 0 | No PFAS detected |
| Imperial, City Of | CA1310006 | Imperial | 22,102 | <MRL | <MRL | 0 | No PFAS detected |
| Indian Wells Valley W.D. | CA1510017 | Ridgecrest | 41,474 | <MRL | <MRL | 0 | No PFAS detected |
| Indio Water Authority | CA3310020 | Indio | 89,137 | <MRL | <MRL | 0 | No PFAS detected |
| Inglewood- City, Water Dept. | CA1910051 | Inglewood | 81,191 | 4.4 | <MRL | 0 | PFOA 1–3 × its limit |
| Irvine Ranch Water District | CA3010092 | Irvine | 450,323 | <MRL | <MRL | 0 | Other PFAS detected |
| Ivanhoe Public Utility Dist | CA5410019 | Ivanhoe | 4,580 | <MRL | <MRL | 0 | No PFAS detected |
| Jackson Rancheria Casino & Hotel | 090605109 | Jackson | 6,120 | <MRL | <MRL | 0 | No PFAS detected |
| Jackson Valley Irrigation District | CA0300037 | Ione | 1,303 | <MRL | <MRL | 0 | No PFAS detected |
| Joe'S Travel Plaza (Eh) | CA5000202 | Westley | 26 | <MRL | <MRL | 0 | No PFAS detected |
| Joshua Basin Water District | CA3610025 | Joshua Tree | 6,489 | <MRL | <MRL | 0 | No PFAS detected |
| Jurupa Community Sd | CA3310021 | Jurupa Valley | 134,638 | <MRL | <MRL | 0 | No PFAS detected |
| Kelseyville Co Waterworks District 3 | CA1710007 | Lakeport | 4,102 | <MRL | <MRL | 0 | No PFAS detected |
| Kerman, City Of | CA1010018 | Kerman | 17,256 | <MRL | <MRL | 0 | No PFAS detected |
| Kern Valley State Prison | CA1510802 | Delano | 5,000 | <MRL | <MRL | 0 | No PFAS detected |
| Keyes Community Services Dist. | CA5010009 | Keyes | 5,672 | <MRL | <MRL | 0 | No PFAS detected |
| Kingsburg, City Of | CA1010019 | Kingsburg | 13,540 | <MRL | <MRL | 0 | No PFAS detected |
| Kirkwood Meadows Public Utility District | CA0210002 | Kirkwood | 2,297 | <MRL | <MRL | 0 | Other PFAS detected |
| Konocti County Water District | CA1710006 | Clearlake | 5,928 | <MRL | <MRL | 0 | Other PFAS detected |
| La Canada Irrigation Dist. | CA1910054 | La Canada | 9,258 | <MRL | <MRL | 0 | No PFAS detected |
| La Cumbre Mutual Water Co | CA4210024 | Santa Barbara | 4,861 | <MRL | <MRL | 0 | No PFAS detected |
| La Habra Heights Cwd | CA1910218 | La Habra Heights | 5,682 | 11 | 23 | 0.454 | PFOS ≥ 3 × its limit |
| La Puente Valley Cwd | CA1910060 | La Puente | 8,276 | <MRL | <MRL | 0 | No PFAS detected |
| La Verne, City Wd | CA1910062 | La Verne | 31,334 | <MRL | <MRL | 0 | No PFAS detected |
| Laguna Beach County Wd | CA3010017 | Laguna Beach | 18,862 | <MRL | <MRL | 0 | No PFAS detected |
| Lake Almanor Country Club Mwc | CA3210006 | Lake Almanor | 500 | <MRL | <MRL | 0 | No PFAS detected |
| Lake Arrowhead Csd | CA3610005 | Lake Arrowhead | 7,038 | 14 | 7.2 | 0.79 | PFOA ≥ 3 × its limit |
| Lake Hemet Mwd | CA3310022 | Hemet | 52,913 | <MRL | <MRL | 0 | No PFAS detected |
| Lake Of The Springs | CA5800809 | Oregon House | 6,500 | <MRL | <MRL | 0 | No PFAS detected |
| Lakeport, City Of | CA1710004 | Lakeport | 4,762 | <MRL | <MRL | 0 | No PFAS detected |
| Lakeside Wd | CA3710013 | Lakeside | 35,500 | <MRL | 4.8 | 0.582 | PFOS 1–3 × its limit |
| Lakeside Woods Mutual Water Co | CA4500013 | Lakehead | 186 | <MRL | <MRL | 0 | No PFAS detected |
| Lakewood - City, Water Dept. | CA1910239 | Lakewood | 66,356 | <MRL | 18.5 | 0.34 | PFOS ≥ 3 × its limit |
| Lamont Public Utility Dist | CA1510012 | Lamont | 19,057 | <MRL | <MRL | 0 | No PFAS detected |
| Las Flores Water Co. | CA1910061 | Altadena | 2,211 | <MRL | <MRL | 0 | No PFAS detected |
| Las Virgenes Mwd | CA1910225 | Calabasas | 77,562 | <MRL | <MRL | 0 | No PFAS detected |
| Laton Community Services District | CA1010020 | Laton | 1,151 | 6.2 | 6.1 | 0.002 | PFOA 1–3 × its limit |
| Lawrence Livermore National Lab Site 200 | CA0110701 | Livermore | 10,735 | <MRL | <MRL | 0 | No PFAS detected |
| Lemoore Naval Air Station | CA1610700 | Lemoore | 6,000 | <MRL | <MRL | 0 | No PFAS detected |
| Lemoore, City Of | CA1610005 | Lemoore | 27,185 | <MRL | <MRL | 0 | No PFAS detected |
| Liberty Utilities (Av Ranchos) Corp. | CA3610003 | Downey | 63,381 | <MRL | <MRL | 0 | No PFAS detected |
| Liberty Utilities - Bellflower-Norwalk | CA1910211 | Downey | 72,472 | 16 | 59 | 1.103 | PFOS ≥ 3 × its limit |
| Liberty Utilities - Compton | CA1910021 | Downey | 26,316 | <MRL | <MRL | 0 | No PFAS detected |
| Liberty Utilities - Lynwood | CA1910161 | Downey | 24,649 | 5 | 17 | 0.48 | PFOS ≥ 3 × its limit |
| Lincoln Avenue Water Co. | CA1910063 | Altadena | 8,721 | <MRL | <MRL | 0 | No PFAS detected |
| Linda County Water District | CA5810002 | Marysville | 21,654 | <MRL | <MRL | 0 | No PFAS detected |
| Lindsay, City Of | CA5410006 | Lindsay | 12,659 | 9.2 | 12 | 0.002 | PFOS ≥ 3 × its limit |
| Littlerock Creek Irrigation Dist. | CA1910064 | Littlerock | 3,066 | <MRL | <MRL | 0 | No PFAS detected |
| Lodi, City Of | CA3910004 | Lodi | 67,093 | 6.2 | 5.6 | 0.613 | PFOA 1–3 × its limit |
| Loma Linda University | CA3600152 | Loma Linda | 455 | <MRL | 4.2 | 0.31 | PFOS 1–3 × its limit |
| Loma Linda, City Of | CA3610013 | Loma Linda | 25,208 | <MRL | <MRL | 0 | No PFAS detected |
| Lomita-City, Water Dept. | CA1910073 | Lomita | 20,256 | <MRL | 4.3 | 0.41 | PFOS 1–3 × its limit |
| Lompoc-City Water Utility Div | CA4210006 | Lompoc | 40,538 | <MRL | <MRL | 0 | No PFAS detected |
| Long Beach Utilities Department | CA1910065 | Long Beach | 466,772 | <MRL | <MRL | 0 | No PFAS detected |
| Los Angeles Cwwd 29 & 80-Malibu | CA1910204 | Alhambra | 31,316 | <MRL | <MRL | 0 | No PFAS detected |
| Los Angeles Cwwd 36-Val Verde | CA1910185 | Alhambra | 6,712 | <MRL | <MRL | 0 | No PFAS detected |
| Los Angeles Cwwd 37-Acton | CA1910248 | Alhambra | 4,782 | <MRL | <MRL | 0 | No PFAS detected |
| Los Angeles Cwwd 40 Reg 4 & 34 Lancaster | CA1910070 | Alhambra | 208,129 | <MRL | <MRL | 0 | No PFAS detected |
| Los Angeles Cwwd 40, R 24,27,33-Pearblsm | CA1910203 | Alhambra | 11,609 | — | — | — | No PFAS detected |
| Los Angeles Cwwd 40, Reg. 38-Lake La | CA1910005 | Alhambra | 12,582 | <MRL | <MRL | 0 | No PFAS detected |
| Los Angeles-City, Dept. Of Water & Power | CA1910067 | Los Angeles | 3,875,566 | <MRL | <MRL | 0 | No PFAS detected |
| Los Osos Community Services District | CA4010016 | Los Osos | 7,086 | 14.7 | 11.7 | 0.849 | PFOA ≥ 3 × its limit |
| Lucerne Water Co. - Cal Water Service | CA1710005 | San Jose | 2,312 | <MRL | <MRL | 0 | No PFAS detected |
| Lynwood-City, Water Dept. | CA1910079 | Lynwood | 66,967 | 7.8 | 23 | 0.61 | PFOS ≥ 3 × its limit |
| Madera Valley Water Company | CA2010010 | Madera | 6,524 | <MRL | <MRL | 0 | No PFAS detected |
| Malaga County Water District | CA1010042 | Fresno | 1,200 | <MRL | <MRL | 0 | No PFAS detected |
| Mammoth Cwd | CA2610001 | Mammoth Lakes | 8,234 | <MRL | <MRL | 0 | No PFAS detected |
| Mammoth Mountain Ski Area - Outpost 14 | CA2600624 | Mammoth Lakes | 891 | <MRL | <MRL | 0 | No PFAS detected |
| Manhattan Beach-City, Water Dept. | CA1910083 | Manhattan Beach | 34,051 | <MRL | <MRL | 0 | No PFAS detected |
| Manteca, City Of | CA3910005 | Manteca | 84,928 | 7 | <MRL | 1.9 | Hazard Index 1–3 × its limit |
| Marin Municipal Water District | CA2110002 | Corte Madera | 188,116 | <MRL | <MRL | 0 | No PFAS detected |
| Marina Coast Water District | CA2710017 | Marina | 38,918 | <MRL | <MRL | 0 | No PFAS detected |
| Maywood Mutual Water Co. #1 | CA1910084 | Huntington Park | 3,851 | <MRL | 11.3 | 0 | PFOS 1–3 × its limit |
| Maywood Mutual Water Co. #2 | CA1910085 | Maywood | 6,349 | <MRL | 4.3 | 0 | PFOS 1–3 × its limit |
| Maywood Mutual Water Co. #3 | CA1910086 | Maywood | 6,059 | 7.3 | 26.4 | 0.61 | PFOS ≥ 3 × its limit |
| Mcfarland, City Of | CA1510013 | Mcfarland | 14,161 | <MRL | <MRL | 0 | No PFAS detected |
| Mckinleyville C.S.D. | CA1210016 | Mckinleyville | 16,900 | <MRL | <MRL | 0 | No PFAS detected |
| Meadow Vista Cwd | CA3110009 | Meadow Vista | 4,217 | <MRL | <MRL | 0 | No PFAS detected |
| Meadows Union Elementary School | CA1300554 | El Centro | 550 | <MRL | <MRL | 0 | No PFAS detected |
| Meiners Oaks Cwd | CA5610005 | Ojai | 4,200 | <MRL | <MRL | 0 | No PFAS detected |
| Mendota, City Of | CA1010021 | Mendota | 12,595 | <MRL | <MRL | 0 | No PFAS detected |
| Menlo Park Municipal Water | CA4110017 | Menlo Park | 22,362 | <MRL | <MRL | 0 | No PFAS detected |
| Mesa Water District | CA3010004 | Costa Mesa | 110,000 | <MRL | <MRL | 0 | No PFAS detected |
| Mid Valley Ag | CA5000592 | Oakdale | 25 | <MRL | <MRL | 0 | No PFAS detected |
| Mid-Peninsula Water District | CA4110001 | Belmont | 31,059 | <MRL | <MRL | 0 | No PFAS detected |
| Millview County Water District | CA2310006 | Ukiah | 5,500 | <MRL | <MRL | 0 | No PFAS detected |
| Mission Hills Csd | CA4210019 | Lompoc | 3,600 | <MRL | <MRL | 0 | No PFAS detected |
| Mission Springs Wd | CA3310008 | Desert Hot Springs | 43,484 | <MRL | <MRL | 0 | No PFAS detected |
| Modesto, City Of | CA5010010 | Modesto | 218,915 | 8.6 | 26 | 0.93 | PFOS ≥ 3 × its limit |
| Mojave Pud | CA1510014 | Mojave | 4,699 | <MRL | <MRL | 0 | No PFAS detected |
| Monrovia-City, Water Dept. | CA1910090 | Monrovia | 37,931 | 5.4 | 6.1 | 0.35 | PFOS 1–3 × its limit |
| Montara Water And Sanitary District | CA4110010 | Montara | 6,088 | <MRL | <MRL | 0 | No PFAS detected |
| Monte Vista Wd | CA3610029 | Montclair | 56,390 | <MRL | 5.6 | 0.74 | PFOS 1–3 × its limit |
| Montebello Land & Water Co. | CA1910091 | Montebello | 26,554 | 16 | 53 | 0.866 | PFOS ≥ 3 × its limit |
| Montecito Water Dist | CA4210007 | Santa Barbara | 12,010 | <MRL | <MRL | 0 | No PFAS detected |
| Monterey Park-City, Water Dept. | CA1910092 | Monterey Park | 61,096 | <MRL | <MRL | 0 | Other PFAS detected |
| Morongo | 090600142 | Banning | 16,000 | <MRL | <MRL | 0 | No PFAS detected |
| Morro Bay Pw Dept - Water Division | CA4010011 | Morro Bay | 10,757 | <MRL | <MRL | 0 | No PFAS detected |
| Moulton Niguel Water District | CA3010073 | Laguna Hills | 168,315 | <MRL | <MRL | 0 | No PFAS detected |
| Mt. Konocti Mutual Water Company | CA1710014 | Kelseyville | 4,360 | <MRL | <MRL | 0 | No PFAS detected |
| Mt. Shasta, City Of | CA4710008 | Mt. Shasta | 3,642 | <MRL | <MRL | 0 | No PFAS detected |
| Muscoy Mwc No. 1 | CA3610031 | San Bernardino | 13,000 | <MRL | <MRL | 0 | No PFAS detected |
| Myoma Dunes Mutual Water Company | CA3310051 | Bermuda Dunes | 9,445 | <MRL | <MRL | 0 | No PFAS detected |
| Napa, City Of | CA2810003 | Napa | 84,804 | <MRL | <MRL | 0 | No PFAS detected |
| Nas North Island & Nab Coronado | CA3710750 | San Diego | 421 | <MRL | <MRL | 0 | No PFAS detected |
| Nasa Ames Research Center | CA4300997 | Moffett Field | 1,200 | <MRL | <MRL | 0 | No PFAS detected |
| Needles, City Of | CA3610032 | Needles | 4,872 | <MRL | <MRL | 0 | No PFAS detected |
| Nevada Id - E. George, Banner Mountain | CA2910004 | Grass Valley | 17,154 | <MRL | <MRL | 0 | No PFAS detected |
| Nevada Id - Lake Of Pines | CA2910014 | Grass Valley | 6,870 | <MRL | <MRL | 0 | No PFAS detected |
| Nevada Id - Lake Wildwood | CA2910023 | Grass Valley | 9,108 | <MRL | <MRL | 0 | No PFAS detected |
| Nevada Id - Loma Rica | CA2910006 | Grass Valley | 14,072 | <MRL | <MRL | 0 | No PFAS detected |
| Nevada Id - North Auburn | CA3110026 | Grass Valley | 6,870 | <MRL | <MRL | 0 | No PFAS detected |
| Nipomo Comm Services Dist | CA4010026 | Nipomo | 13,771 | <MRL | <MRL | 0 | No PFAS detected |
| Norco, City Of | CA3310025 | Norco | 25,068 | 13.7 | 31.4 | 1.386 | PFOS ≥ 3 × its limit |
| North Coast County Water Dist | CA4110025 | Pacifica | 38,546 | <MRL | <MRL | 0 | No PFAS detected |
| North Marin Water District | CA2110003 | Novato | 61,691 | <MRL | <MRL | 0 | No PFAS detected |
| North Perris Water System | CA3310082 | Perris | 4,500 | <MRL | <MRL | 0 | No PFAS detected |
| North Tahoe Pud - Main | CA3110001 | Tahoe Vista | 6,321 | <MRL | <MRL | 0 | No PFAS detected |
| Northrop Grumman Corp. | CA1910097 | Palmdale | 5,764 | 5.5 | <MRL | 0.382 | PFOA 1–3 × its limit |
| Northstar C.S.D. | CA3110028 | Truckee | 3,165 | <MRL | <MRL | 0 | No PFAS detected |
| Norwalk - City, Water Dept. | CA1910191 | Norwalk | 20,283 | 5.2 | 26 | 0.76 | PFOS ≥ 3 × its limit |
| Nps Ggnra | CA2110350 | Sausalito | 75 | <MRL | <MRL | 0 | No PFAS detected |
| Nuevo Water Company | CA3310026 | Nuevo | 6,733 | 7 | 4.6 | 0.44 | PFOA 1–3 × its limit |
| Oakdale, City Of | CA5010014 | Oakdale | 23,235 | <MRL | <MRL | 0 | No PFAS detected |
| Oceano Comm Services Dist. | CA4010005 | Oceano | 7,598 | <MRL | <MRL | 0 | No PFAS detected |
| Oceanside, City Of | CA3710014 | Oceanside | 174,340 | <MRL | <MRL | 0 | No PFAS detected |
| Oildale Mwc | CA1510015 | Bakersfield | 45,315 | <MRL | <MRL | 0 | No PFAS detected |
| Ojai Water System | CA5610014 | Oak View | 6,801 | <MRL | <MRL | 0 | No PFAS detected |
| Olivehurst Public Utility District | CA5810003 | Olivehurst | 16,595 | <MRL | <MRL | 0 | No PFAS detected |
| Olivenhain Mwd | CA3710029 | Encinitas | 86,458 | <MRL | <MRL | 0 | No PFAS detected |
| Olympia Mobilodge | CA3410022 | Fair Oaks | 450 | 4.2 | <MRL | 0.4 | PFOA 1–3 × its limit |
| Ontario Municipal Utilities Company | CA3610034 | Ontario | 185,010 | 30 | 5.2 | 0.42 | PFOA ≥ 3 × its limit |
| Orange Vale Water Company | CA3410016 | Orangevale | 16,861 | <MRL | <MRL | 0 | No PFAS detected |
| Orchard Dale Water District | CA1910101 | Whittier | 25,000 | 9.9 | 23 | 0.404 | PFOS ≥ 3 × its limit |
| Orosi Public Utility District | CA5410008 | Orosi | 8,300 | <MRL | <MRL | 0 | No PFAS detected |
| Otay Water District | CA3710034 | Spring Valley | 242,155 | <MRL | <MRL | 0 | No PFAS detected |
| Oxnard Water Dept | CA5610007 | Oxnard | 200,232 | <MRL | <MRL | 0 | No PFAS detected |
| Padre Dam Mwd | CA3710037 | Santee | 93,980 | <MRL | <MRL | 0 | Other PFAS detected |
| Pala North | 090605153 | Pala | 14,280 | 6.1 | <MRL | 0.006 | PFOA 1–3 × its limit |
| Palisades Tahoe 8200 Water System | CA3103294 | Olympic Valley | 3,500 | <MRL | <MRL | 0 | No PFAS detected |
| Palm Ranch Irrigation Dist. | CA1910103 | Quartz Hill | 5,507 | <MRL | <MRL | 0 | No PFAS detected |
| Palmdale Water Dist. | CA1910102 | Palmdale | 126,804 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Paradise Irrigation District | CA0410007 | Paradise | 9,114 | <MRL | <MRL | 0 | No PFAS detected |
| Paramount - City, Water Dept. | CA1910105 | Paramount | 55,200 | <MRL | <MRL | 0 | No PFAS detected |
| Pasadena Water And Power | CA1910124 | Pasadena | 165,448 | <MRL | <MRL | 0 | No PFAS detected |
| Patterson Tract Csd | CA5402038 | Visalia | 550 | <MRL | <MRL | 0 | No PFAS detected |
| Patterson, City Of | CA5010017 | Patterson | 24,977 | <MRL | <MRL | 0 | No PFAS detected |
| Pauma | 090605012 | Pauma Valley | 5,700 | <MRL | <MRL | 0 | No PFAS detected |
| Pechanga | 090605013 | Temecula | 29,100 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Perris, City Of | CA3310029 | Perris | 7,854 | <MRL | <MRL | 0 | Other PFAS detected |
| Petaluma, City Of | CA4910006 | Petaluma | 61,427 | <MRL | <MRL | 0 | No PFAS detected |
| Peter Pitchess Honor Rancho Detn. Ctr | CA1900046 | Castaic | 7,000 | 5 | 6.5 | 0.31 | PFOS 1–3 × its limit |
| Phelan Pinon Hills Csd | CA3610120 | Phelan | 24,509 | <MRL | <MRL | 0 | No PFAS detected |
| Pico Rivera - City, Water Dept. | CA1910042 | Pico Rivera | 39,451 | 16 | 30 | 0.565 | PFOS ≥ 3 × its limit |
| Pico Wd | CA1910125 | Pico Rivera | 22,051 | 14 | 28 | 0.574 | PFOS ≥ 3 × its limit |
| Pinedale County Water District | CA1010026 | Pinedale | 16,736 | 12 | 8.8 | 0.403 | PFOA ≥ 3 × its limit |
| Pismo Beach Water Department | CA4010008 | Pismo Beach | 7,944 | <MRL | <MRL | 0 | No PFAS detected |
| Placer Cwa - Auburn/Bowman | CA3110005 | Auburn | 27,317 | <MRL | <MRL | 0 | No PFAS detected |
| Placer Cwa - Foothill | CA3110025 | Auburn | 93,417 | <MRL | <MRL | 0 | No PFAS detected |
| Placerville, City Of - Main | CA0910003 | Placerville | 9,224 | <MRL | <MRL | 0 | No PFAS detected |
| Planada Csd | CA2410007 | Planada | 4,164 | <MRL | 14.7 | 0.65 | PFOS ≥ 3 × its limit |
| Pleasant Valley Mutual Water Co | CA5610008 | Camarillo | 5,306 | 10.1 | 11 | 0.87 | PFOS 1–3 × its limit |
| Plumas Lake | CA5805001 | Olivehurst | 11,374 | <MRL | <MRL | 0 | No PFAS detected |
| Pomona - City, Water Dept. | CA1910126 | Pomona | 151,713 | 7.1 | 18 | 0.792 | PFOS ≥ 3 × its limit |
| Ponderosa Basin Mutual Wtr Co | CA2210002 | Mariposa | 798 | <MRL | <MRL | 0 | No PFAS detected |
| Port Hueneme City Water Dept | CA5610009 | Port Hueneme | 21,582 | <MRL | <MRL | 0 | No PFAS detected |
| Porterville, City Of | CA5410010 | Porterville | 63,487 | 22 | 23 | 0.362 | PFOS ≥ 3 × its limit |
| Porterville-Jones Corner | CA5410048 | Porterville | 339 | <MRL | <MRL | 0 | No PFAS detected |
| Potrero Elementary School | CA3700963 | Pine Valley | 300 | 188.3 | 64.2 | 26.043 | PFOA ≥ 3 × its limit |
| Poway, City Of | CA3710015 | Poway | 49,888 | <MRL | <MRL | 0 | No PFAS detected |
| Presidio Of San Francisco | CA3810700 | San Francisco | 3,500 | 4 | <MRL | 0.462 | PFOA 1–3 × its limit |
| Psmcsd - Pajaro | CA2710020 | Royal Oaks | 3,500 | <MRL | <MRL | 0 | No PFAS detected |
| Purissima Hills Water District | CA4310021 | Los Altos Hills | 6,252 | <MRL | <MRL | 0 | No PFAS detected |
| Quartz Hill Water Dist. | CA1910130 | Quartz Hill | 19,322 | <MRL | <MRL | 0 | No PFAS detected |
| Quechan Utility | 090400089 | Yuma | 5,660 | <MRL | <MRL | 0 | No PFAS detected |
| Rainbow Municipal Wd | CA3710016 | Fallbrook | 23,536 | <MRL | <MRL | 0 | No PFAS detected |
| Ramona Municipal Wd | CA3710019 | Ramona | 36,455 | <MRL | <MRL | 0 | No PFAS detected |
| Rancheritos Mwc | CA3600200 | Apple Valley | 487 | <MRL | <MRL | 0 | No PFAS detected |
| Rancho California Water District | CA3310038 | Temecula | 146,147 | 11 | 16 | 0.674 | PFOS ≥ 3 × its limit |
| Rancho Los Amigos Hospital | CA1900679 | Alhambra | 3,200 | 7.8 | 26.2 | 0.41 | PFOS ≥ 3 × its limit |
| Rancho Murieta Community Servi | CA3410005 | Rancho Murieta | 5,728 | <MRL | <MRL | 0 | No PFAS detected |
| Red Hawk Casino - Shingle Springs | 090600058 | Shingle Springs | 11,268 | <MRL | <MRL | 0 | No PFAS detected |
| Redlands City Mud-Water Div | CA3610037 | Redlands | 78,025 | 4.3 | 5.8 | 0.48 | PFOS 1–3 × its limit |
| Redwood Valley County Water District | CA2310008 | Ukiah | 5,200 | <MRL | <MRL | 0 | No PFAS detected |
| Reedley, City Of | CA1010027 | Reedley | 26,076 | <MRL | <MRL | 0 | No PFAS detected |
| Rialto, City Of | CA3610038 | Rialto | 59,264 | 7.3 | <MRL | 0.352 | PFOA 1–3 × its limit |
| Rincon Del Diablo Mwd (Id-1) | CA3710018 | Escondido | 28,427 | <MRL | <MRL | 0 | Other PFAS detected |
| Rincon Northern | 090600147 | Valley Center | 7,003 | 5.6 | 8.9 | 0.002 | PFOS 1–3 × its limit |
| Rio Dell, City Of | CA1210012 | Rio Dell | 3,300 | <MRL | <MRL | 0 | No PFAS detected |
| Rio Linda/Elverta Community Water Dist | CA3410018 | Rio Linda | 15,460 | <MRL | <MRL | 0.4 | Hazard Index below its limit |
| Ripon, City Of | CA3910007 | Ripon | 15,753 | 5.2 | 12 | 0.35 | PFOS ≥ 3 × its limit |
| Riverbank, City Of | CA5010018 | Riverbank | 25,625 | <MRL | <MRL | 0 | No PFAS detected |
| Riverside Csa #122-Mesa Verde | CA3310028 | Blythe | 766 | <MRL | <MRL | 0 | No PFAS detected |
| Riverside Highland Water Company | CA3610057 | Grand Terrace | 19,053 | 18 | 19 | 1.407 | PFOS ≥ 3 × its limit |
| Riverside, City Of | CA3310031 | Riverside | 302,776 | <MRL | 4 | 0 | PFOS 1–3 × its limit |
| Rodney Strong Vineyards | CA4900897 | Healdsburg | 150 | <MRL | <MRL | 0 | No PFAS detected |
| Rohnert Park, City Of | CA4910014 | Rohnert Park | 43,821 | <MRL | 4.5 | 0.57 | PFOS 1–3 × its limit |
| Rolling Hills Casino | 090600052 | Corning | 4,782 | <MRL | <MRL | 0 | No PFAS detected |
| Rosamond Csd | CA1510018 | Rosamond | 18,150 | <MRL | <MRL | 0 | No PFAS detected |
| Rowland Water District | CA1910194 | Rowland Heights | 56,100 | <MRL | <MRL | 0 | Other PFAS detected |
| Rubidoux Community Sd | CA3310044 | Jurupa Valley | 38,522 | <MRL | <MRL | 0 | Other PFAS detected |
| Rubio Canon Land & Water Association | CA1910140 | Altadena | 6,646 | 8.5 | 19 | 1.102 | PFOS ≥ 3 × its limit |
| Running Springs Water District | CA3610062 | Running Springs | 5,268 | 15.9 | 236.5 | 9.556 | PFOS ≥ 3 × its limit |
| Russian River County Water District | CA4910008 | Forestville | 4,150 | <MRL | <MRL | 0 | No PFAS detected |
| Sacramento International Airport [Sws] | CA3400139 | Sacramento | 9,000 | <MRL | <MRL | 0 | No PFAS detected |
| Sacramento Suburban Water District | CA3410001 | Sacramento | 194,444 | <MRL | <MRL | 0.582 | Hazard Index below its limit |
| Salinas Valley State Prison | CA2710851 | Soledad | 2,930 | <MRL | <MRL | 0 | No PFAS detected |
| San Antonio Water Company | CA3610085 | Upland | 3,441 | <MRL | <MRL | 0 | No PFAS detected |
| San Benito High School | CA3500571 | Hollister | 3,310 | <MRL | <MRL | 0 | No PFAS detected |
| San Bernardino City | CA3610039 | San Bernardino | 214,665 | <MRL | <MRL | 0.402 | Hazard Index below its limit |
| San Diego, City Of | CA3710020 | San Diego | 1,408,937 | <MRL | <MRL | 0 | No PFAS detected |
| San Dieguito Wd | CA3710021 | Encinitas | 40,405 | 4.3 | <MRL | 0.002 | PFOA 1–3 × its limit |
| San Fernando-City, Water Dept. | CA1910143 | San Fernando | 23,364 | <MRL | <MRL | 0 | No PFAS detected |
| San Francisco International Airport | CA3810010 | San Francisco | 42,400 | <MRL | <MRL | 0 | No PFAS detected |
| San Francisco Regional Water System | CA3810001 | Burlingame | 600 | <MRL | <MRL | 0 | No PFAS detected |
| San Gabriel County Wd | CA1910144 | Rosemead | 40,154 | <MRL | <MRL | 0 | No PFAS detected |
| San Gabriel Valley Water Co-Montebello 1 | CA1910189 | El Monte | 5,205 | <MRL | <MRL | 0 | No PFAS detected |
| San Gabriel Valley Water Co-Montebello 2 | CA1910117 | El Monte | 3,731 | <MRL | <MRL | 0 | No PFAS detected |
| San Gabriel Valley Water Co.-El Monte | CA1910039 | El Monte | 240,000 | <MRL | <MRL | 0 | Other PFAS detected |
| San Gabriel Valley Wc - Fontana | CA3610041 | Fontana | 228,270 | <MRL | <MRL | 0 | No PFAS detected |
| San Jacinto, City Of | CA3310032 | San Jacinto | 20,938 | <MRL | <MRL | 0 | No PFAS detected |
| San Joaquin County - Lincoln Village | CA3910010 | Stockton | 5,841 | <MRL | <MRL | 0 | No PFAS detected |
| San Joaquin County-Mokelumne Acres | CA3910017 | Stockton | 3,802 | 8.3 | 13.5 | 0.474 | PFOS ≥ 3 × its limit |
| San Joaquin River Club Inc | CA3910018 | Tracy | 600 | <MRL | <MRL | 0 | No PFAS detected |
| San Joaquin, City Of | CA1010034 | San Joaquin | 4,060 | <MRL | <MRL | 0 | No PFAS detected |
| San Jose Water | CA4310011 | San Jose | 1,039,920 | <MRL | 6.2 | 0.55 | PFOS 1–3 × its limit |
| San Juan Water District | CA3410021 | Granite Bay | 29,738 | <MRL | <MRL | 0 | No PFAS detected |
| San Lorenzo Valley Water Dist | CA4410014 | Boulder Creek | 21,513 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| San Luis Obispo Water Department | CA4010009 | San Luis Obispo | 49,534 | <MRL | <MRL | 0 | No PFAS detected |
| Santa Ana River Water Company | CA3310033 | Jurupa Valley | 6,475 | <MRL | <MRL | 0 | No PFAS detected |
| Santa Clarita Valley W.A.-Castaic Div. | CA1910247 | Santa Clarita | 9,999 | <MRL | <MRL | 0 | No PFAS detected |
| Santa Clarita Valley W.A.-Newhall Div. | CA1910096 | Santa Clarita | 17,498 | <MRL | <MRL | 0.78 | Hazard Index below its limit |
| Santa Clarita Valley W.A.-Pinetree Div. | CA1910250 | Santa Clarita | 15,998 | <MRL | <MRL | 0 | No PFAS detected |
| Santa Clarita Valley W.A.-Santa Clarita | CA1910017 | Newhall | 135,281 | 20.5 | 17.8 | 0.474 | PFOA ≥ 3 × its limit |
| Santa Clarita Valley W.A.-Tesoro Div. | CA1910255 | Santa Clarita | 6,499 | <MRL | <MRL | 0 | No PFAS detected |
| Santa Clarita Valley Water Agency | CA1910240 | Newhall | 292,014 | 16.9 | 7.5 | 0.763 | PFOA ≥ 3 × its limit |
| Santa Cruz Water Department | CA4410010 | Santa Cruz | 94,626 | <MRL | <MRL | 0 | No PFAS detected |
| Santa Fe I.D. | CA3710023 | Rancho Santa Fe | 21,539 | <MRL | <MRL | 0 | Other PFAS detected |
| Santa Fe Springs - City, Water Dept. | CA1910245 | Santa Fe Springs | 19,219 | 6.9 | 14 | 0.003 | PFOS ≥ 3 × its limit |
| Santa Margarita Water District | CA3010101 | Rancho Santa Margarita | 165,275 | <MRL | <MRL | 0 | No PFAS detected |
| Santa Margarita Water District-Id9 | CA3010030 | Rancho Santa Margarita | 35,309 | <MRL | <MRL | 0 | No PFAS detected |
| Santa Monica-City, Water Division | CA1910146 | Los Angeles | 90,729 | 4.6 | <MRL | 0.002 | PFOA 1–3 × its limit |
| Santa Rosa Tachi Palace | 090605136 | Lemoore | 9,000 | <MRL | <MRL | 0 | No PFAS detected |
| Santa Rosa, City Of | CA4910009 | Santa Rosa | 178,452 | <MRL | <MRL | 0 | No PFAS detected |
| Santa Ynez River Water Cons. Dist. Id#1 | CA4210020 | Santa Ynez | 7,022 | <MRL | <MRL | 0 | No PFAS detected |
| Sbdno County Service Area 64 | CA3610121 | San Bernardino | 14,955 | <MRL | <MRL | 0 | No PFAS detected |
| Sbdno County Service Area 70J | CA3610125 | San Bernardino | 12,895 | <MRL | <MRL | 0 | No PFAS detected |
| Scotts Valley Water District | CA4410013 | Scotts Valley | 11,197 | <MRL | <MRL | 0 | Other PFAS detected |
| Scwa - Arden Park Vista | CA3410002 | Sacramento | 10,068 | 5.5 | 8.3 | 0 | PFOS 1–3 × its limit |
| Scwa - Laguna/Vineyard | CA3410029 | Sacramento | 188,417 | 14 | 24 | 0.682 | PFOS ≥ 3 × its limit |
| Scwa Mather-Sunrise | CA3410704 | Sacramento | 32,812 | <MRL | <MRL | 0 | No PFAS detected |
| Sea Ranch Water Company,The (Puc) | CA4910007 | Sea Ranch | 1,287 | <MRL | <MRL | 0.33 | Hazard Index below its limit |
| Sebastopol, City Of | CA4910011 | Sebastopol | 7,522 | <MRL | <MRL | 0 | No PFAS detected |
| Serrano Water District | CA3010082 | Villa Park | 5,659 | <MRL | <MRL | 0 | Other PFAS detected |
| Sfpuc City Distribution Division | CA3810011 | Burlingame | 848,019 | <MRL | <MRL | 0 | No PFAS detected |
| Shafter, City Of | CA1510019 | Shafter | 21,915 | <MRL | <MRL | 0 | No PFAS detected |
| Sheep Creek Water Company | CA3610109 | Phelan | 4,002 | <MRL | <MRL | 0.323 | Hazard Index below its limit |
| Sierra Madre-City, Water Dept. | CA1910148 | Sierra Madre | 11,000 | <MRL | <MRL | 0 | No PFAS detected |
| Sierra Tahoe Main Lodge | CA0900659 | Twin Bridges | 1,900 | 5 | <MRL | 0.002 | PFOA 1–3 × its limit |
| Signal Hill - City, Water Dept. | CA1910149 | Signal Hill | 11,848 | <MRL | <MRL | 0 | No PFAS detected |
| Slvwd - Felton Water System | CA4410002 | Boulder Creek | 4,491 | <MRL | <MRL | 0 | No PFAS detected |
| So. Cal. Edison Co.-Santa Catalina | CA1910006 | Avalon | 3,822 | <MRL | <MRL | 0 | Other PFAS detected |
| Soledad, City Of | CA2710011 | Soledad | 19,732 | <MRL | <MRL | 0 | No PFAS detected |
| Solvang Water Division | CA4210013 | Solvang | 5,980 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Sonoma State University | CA4910027 | Rohnert Park | 1,500 | <MRL | <MRL | 0 | No PFAS detected |
| Sonoma, City Of | CA4910012 | Sonoma | 10,619 | 6.2 | <MRL | 0 | PFOA 1–3 × its limit |
| Soquel Creek Water District | CA4410017 | Soquel | 40,962 | <MRL | <MRL | 0 | No PFAS detected |
| South Coast Water District | CA3010042 | Laguna Beach | 41,194 | <MRL | <MRL | 0 | Other PFAS detected |
| South Feather W&P - Miners Ranch | CA0410006 | Oroville | 22,638 | <MRL | <MRL | 0 | No PFAS detected |
| South Gate-City, Water Dept. | CA1910152 | South Gate | 88,544 | 10 | 26 | 0.602 | PFOS ≥ 3 × its limit |
| South Mesa Wc | CA3310017 | Calimesa | 10,348 | <MRL | <MRL | 0.352 | Hazard Index below its limit |
| South Montebello Irrigation Dist. | CA1910153 | Montebello | 15,021 | 8.2 | 20.1 | 0.002 | PFOS ≥ 3 × its limit |
| South Shore Recreation Area | CA0900649 | South Lake Tahoe | 50 | <MRL | <MRL | 0 | No PFAS detected |
| South Tahoe Pud - Main | CA0910002 | South Lake Tahoe | 30,089 | 6.1 | 5.2 | 0.582 | PFOA 1–3 × its limit |
| Sswd - Del Paso Manor Service Area | CA3410007 | Sacramento | 4,854 | <MRL | <MRL | 0 | No PFAS detected |
| St. Helena, City Of | CA2810004 | St. Helena | 5,386 | <MRL | <MRL | 0 | No PFAS detected |
| Stallion Springs Csd | CA1510025 | Tehachapi | 4,910 | <MRL | <MRL | 0 | No PFAS detected |
| Stanford University | CA4310013 | Stanford | 23,817 | <MRL | <MRL | 0 | No PFAS detected |
| Storer Transportation | CA5000372 | Modesto | 40 | <MRL | <MRL | 0 | No PFAS detected |
| Suburban Water Systems - Sativa | CA1910147 | Covina | 4,372 | <MRL | 9.4 | 0.32 | PFOS 1–3 × its limit |
| Suburban Water Systems-Glendora | CA1910046 | Covina | 5,301 | <MRL | <MRL | 0 | No PFAS detected |
| Suburban Water Systems-La Mirada | CA1910059 | Covina | 57,240 | 7 | 16 | 0.382 | PFOS ≥ 3 × its limit |
| Suburban Water Systems-San Jose | CA1910205 | Covina | 170,523 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Suburban Water Systems-Whittier | CA1910174 | Covina | 66,565 | 6.3 | 13 | 0.002 | PFOS ≥ 3 × its limit |
| Suisun-Solano Water Authority | CA4810005 | Vacaville | 29,105 | <MRL | <MRL | 0 | No PFAS detected |
| Sunny Slope Water Co. | CA1910157 | Pasadena | 25,252 | <MRL | <MRL | 0 | No PFAS detected |
| Sunnyslope County Water Dist | CA3510003 | Hollister | 25,486 | 5.8 | 5.1 | 0 | PFOA 1–3 × its limit |
| Sweetwater Authority | CA3710025 | Chula Vista | 184,915 | 11.4 | 5.7 | 0.946 | PFOA 1–3 × its limit |
| Sweetwater Springs Cwd - Guerneville | CA4910004 | Guerneville | 5,156 | <MRL | <MRL | 0 | No PFAS detected |
| Sycuan | 090605024 | El Cajon | 12,350 | <MRL | <MRL | 0 | No PFAS detected |
| Table Mountain Rancheria | 090600154 | Friant | 10,675 | <MRL | <MRL | 0 | No PFAS detected |
| Tahoe City Pud - Main | CA3110010 | Tahoe City | 6,411 | <MRL | <MRL | 0 | No PFAS detected |
| Tehachapi, City Of | CA1510020 | Tehachapi | 9,094 | <MRL | <MRL | 0 | No PFAS detected |
| Tejon Castac Wd - I5 & Laval Rd | CA1503341 | Lebec | 38,125 | <MRL | <MRL | 0 | No PFAS detected |
| Temescal Valley Water District | CA3310074 | Temescal Valley | 22,268 | <MRL | <MRL | 0 | No PFAS detected |
| Templeton Csd | CA4010019 | Templeton | 8,041 | <MRL | <MRL | 0.322 | Hazard Index below its limit |
| Terra Bella Irrigation District - Tbt | CA5410038 | Terra Bella | 2,656 | <MRL | <MRL | 0 | No PFAS detected |
| Thermalito Water & Sewer Dist | CA0410008 | Oroville | 12,209 | <MRL | 4.6 | 0 | PFOS 1–3 × its limit |
| Thousand Trails San Benito Preserve | CA3500505 | Paicines | 17 | <MRL | <MRL | 0 | No PFAS detected |
| Thunder Valley Casino | 090605161 | Auburn | 18,007 | <MRL | <MRL | 0 | No PFAS detected |
| Tipton Community Services Dist | CA5410014 | Tipton | 2,543 | <MRL | <MRL | 0 | No PFAS detected |
| Torrance-City, Water Dept. | CA1910213 | Torrance | 106,183 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Discovery Bay | CA0710009 | Discovery Bay | 16,790 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Hillsborough | CA4110016 | Hillsborough | 11,766 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Yountville | CA2810007 | Yountville | 2,785 | <MRL | <MRL | 0 | No PFAS detected |
| Trabuco Canyon Water District | CA3010094 | Trabuco Canyon | 13,659 | <MRL | <MRL | 0 | No PFAS detected |
| Tract 180 Mutual Water Co. | CA1910159 | Cudahy | 14,000 | 6.5 | 24 | 0.59 | PFOS ≥ 3 × its limit |
| Tract 349 Mutual Water Co. | CA1910160 | Cudahy | 8,700 | 8.2 | 36.5 | 0.66 | PFOS ≥ 3 × its limit |
| Tracy, City Of | CA3910011 | Tracy | 98,215 | <MRL | <MRL | 0 | No PFAS detected |
| Triunfo Water & Sanitation District | CA5610043 | Westlake Village | 13,898 | <MRL | <MRL | 0 | No PFAS detected |
| Trout Gulch Mutual Water Company | CA4400502 | Aptos | 614 | <MRL | <MRL | 0 | No PFAS detected |
| Truckee-Donner Pud, Main | CA2910003 | Truckee | 36,730 | 4.6 | <MRL | 0 | PFOA 1–3 × its limit |
| Tud - Columbia Water System | CA5510013 | Sonora | 5,482 | <MRL | <MRL | 0 | No PFAS detected |
| Tud - Sonora/Jamestown Water System | CA5510001 | Sonora | 11,113 | <MRL | <MRL | 0 | No PFAS detected |
| Tud - Upper Basin Water System | CA5510012 | Sonora | 13,331 | <MRL | <MRL | 0 | No PFAS detected |
| Tud-Wards Ferry Ranches | CA5500363 | Sonora | 62 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Tulare, City Of | CA5410015 | Tulare | 72,241 | <MRL | <MRL | 0 | No PFAS detected |
| Turlock, City Of | CA5010019 | Turlock | 72,888 | <MRL | <MRL | 0 | No PFAS detected |
| Twentynine Palms Water District | CA3610049 | Twentynine Palms | 18,795 | <MRL | <MRL | 0 | No PFAS detected |
| Uc - Davis | CA5710009 | Davis | 13,177 | <MRL | <MRL | 0 | No PFAS detected |
| Ukiah, City Of | CA2310003 | Ukiah | 16,067 | 6.9 | 7.4 | 0.733 | PFOS 1–3 × its limit |
| Union Public Utility District | CA0510001 | Murphys | 4,774 | <MRL | <MRL | 0 | No PFAS detected |
| Upland, City Of | CA3610050 | Upland | 78,376 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Us Army Fort Irwin | CA3610705 | Fort Irwin | 7,800 | <MRL | <MRL | 0 | No PFAS detected |
| Usmc - 29 Palms | CA3610703 | Twentynine Palms | 16,067 | <MRL | <MRL | 0 | No PFAS detected |
| Valencia Heights Water Co. | CA1910163 | West Covina | 7,775 | 5.7 | 4.4 | 0.362 | PFOA 1–3 × its limit |
| Vallecitos Wd | CA3710002 | San Marcos | 114,700 | <MRL | <MRL | 0 | No PFAS detected |
| Valley Center Mwd | CA3710026 | Valley Center | 30,166 | <MRL | <MRL | 0 | No PFAS detected |
| Valley County Water Dist. | CA1910009 | Baldwin Park | 68,871 | <MRL | <MRL | 0 | No PFAS detected |
| Valley Of The Moon Water District | CA4910013 | El Verano | 23,140 | 5.2 | 5.4 | 0.422 | PFOS 1–3 × its limit |
| Valley View Mutual Water Co. | CA1910165 | Baldwin Park | 4,613 | <MRL | <MRL | 0 | No PFAS detected |
| Valley Water Co. | CA1910166 | La Canada Flintridge | 10,113 | <MRL | <MRL | 0 | No PFAS detected |
| Vandenberg Village Comm. Serv. Dist. | CA4210017 | Lompoc | 7,308 | <MRL | <MRL | 0 | No PFAS detected |
| Vaughn Wc Inc | CA1510029 | Bakersfield | 37,189 | <MRL | <MRL | 0 | Other PFAS detected |
| Ventura Cwwd No. 1 - Moorpark | CA5610018 | Moorpark | 35,514 | <MRL | <MRL | 0 | No PFAS detected |
| Ventura River Water District | CA5610022 | Ojai | 6,100 | <MRL | <MRL | 0 | No PFAS detected |
| Ventura Water Department | CA5610017 | Ventura | 112,285 | <MRL | <MRL | 0.301 | Hazard Index below its limit |
| Ventura Wwd No. 8 - Simi Valley | CA5610023 | Simi Valley | 94,736 | <MRL | <MRL | 0 | No PFAS detected |
| Vernon-City, Water Dept. | CA1910167 | Vernon | 28,112 | <MRL | <MRL | 0 | No PFAS detected |
| Victorville Water District | CA3610052 | Victorville | 140,721 | <MRL | <MRL | 0 | No PFAS detected |
| Viejas Community System | 090600158 | Alpine | 9,600 | <MRL | <MRL | 0.012 | Hazard Index below its limit |
| Vista Irrigation District | CA3710027 | Vista | 134,501 | <MRL | <MRL | 0 | No PFAS detected |
| Walnut Park Mutual Water Co. | CA1910169 | Huntington Park | 16,180 | <MRL | <MRL | 0 | No PFAS detected |
| Walnut Valley Water District | CA1910234 | Walnut | 100,941 | <MRL | <MRL | 0 | No PFAS detected |
| Wasco St. Prison Reception Ctr | CA1510801 | Wasco | 5,217 | <MRL | <MRL | 0 | No PFAS detected |
| Wasco, City Of | CA1510021 | Wasco | 22,757 | <MRL | <MRL | 0 | No PFAS detected |
| Watsonville, City Of | CA4410011 | Watsonville | 65,231 | 6.5 | 5.1 | 0.673 | PFOA 1–3 × its limit |
| Weaverville C.S.D. | CA5310001 | Weaverville | 3,975 | <MRL | 19 | 0.56 | PFOS ≥ 3 × its limit |
| West Kern Water District | CA1510022 | Taft | 20,585 | <MRL | <MRL | 0 | No PFAS detected |
| West Valley Water District | CA3610004 | Rialto | 96,123 | <MRL | <MRL | 0 | No PFAS detected |
| Westborough Water District | CA4110027 | South San Francisco | 13,486 | <MRL | <MRL | 0 | No PFAS detected |
| Western Digital Technologies, Inc. | CA4300791 | San Jose | 2,439 | <MRL | <MRL | 0 | No PFAS detected |
| Western Heights Water Company | CA3610053 | Yucaipa | 7,735 | <MRL | <MRL | 0 | No PFAS detected |
| Western Mwd | CA3310049 | Riverside | 87,955 | <MRL | <MRL | 0.342 | Hazard Index below its limit |
| Western Mwd - Murrieta Division | CA3310036 | Riverside | 17,837 | 5.5 | 5.7 | 0.41 | PFOS 1–3 × its limit |
| Whale Gulch School | CA2300847 | Whitethorn | 60 | <MRL | <MRL | 0 | No PFAS detected |
| Whittier-City, Water Dept. | CA1910173 | Whittier | 49,954 | 7.5 | 19 | 0.003 | PFOS ≥ 3 × its limit |
| Willits, City Of | CA2310004 | Willits | 6,175 | <MRL | <MRL | 0 | No PFAS detected |
| Willow County Water District | CA2310005 | Ukiah | 3,797 | <MRL | <MRL | 0 | No PFAS detected |
| Windsor, Town Of | CA4910017 | Windsor | 25,561 | <MRL | <MRL | 0 | No PFAS detected |
| Wine Country Apartments | CA3900559 | Stockton | 40 | <MRL | <MRL | 0 | No PFAS detected |
| Winton Water & Sanitary Dist | CA2410010 | Winton | 9,745 | <MRL | <MRL | 0 | No PFAS detected |
| Woodlake, City Of | CA5410020 | Woodlake | 7,918 | <MRL | <MRL | 0 | No PFAS detected |
| Yocha Dehe Potable Water System | 090605107 | Brooks | 12,800 | <MRL | <MRL | 0 | No PFAS detected |
| Yorba Linda Water District | CA3010037 | Placentia | 84,292 | <MRL | <MRL | 0 | Other PFAS detected |
| Yosemite Spring Park Util Co | CA2010005 | Coarsegold | 5,300 | 7.5 | 7.9 | 1.385 | PFOS 1–3 × its limit |
| Yreka, City Of | CA4710011 | Yreka | 7,879 | <MRL | <MRL | 0 | No PFAS detected |
| Yucaipa Valley Water District | CA3610055 | Yucaipa | 52,202 | 4.2 | <MRL | 0.005 | PFOA 1–3 × its limit |
Not tested under UCMR 5 (3,664)
UCMR 5 required monitoring by systems serving 3,300 or more people and by a representative sample of smaller systems. The systems below have no UCMR 5 results in EPA's data. Not tested is not the same as not detected: the absence of results says nothing about PFAS in their water.
| System | PWSID | Type | City | Population | Counties |
|---|---|---|---|---|---|
| 132 Investments Water System | CA3901031 | CWS | Tracy | 187 | San Joaquin County |
| 141 Suburban Road Water Supply | CA4000725 | NTNCWS | San Luis Obispo | 25 | San Luis Obispo County |
| 148 East Water System | CA1503684 | CWS | Inyokern | 36 | Kern County |
| 15Th Avenue | CA1600293 | CWS | Stockton | 50 | Kings County |
| 49Er Trailer Ranch | CA5500120 | CWS | Columbia | 95 | Tuolumne County |
| 4N Mobilehome Park | CA5000082 | CWS | Oakdale | 65 | Stanislaus County |
| 5033 Pentecost | CA5000573 | NTNCWS | Modesto | 302 | Stanislaus County |
| 60Th Street Assoc. Water System | CA1502744 | CWS | Rosamond | 39 | Kern County |
| 6200 Franklin, Llc (Sws) | CA3400358 | NTNCWS | Mill Valley | 110 | Sacramento County |
| A Sambado & Son 39-321 | CA3902172 | NTNCWS | Linden | 25 | San Joaquin County |
| A.F.P. Mutual Water Company | CA1500466 | CWS | Tehachapi | 710 | Kern County |
| A1 Winstons Mobile Home Park | CA3900606 | CWS | Stockton | 75 | San Joaquin County |
| Aaa Kindness Care Home | CA4200969 | CWS | Santa Maria | 30 | Santa Barbara County |
| Abbey Of New Clairvaux | CA5200559 | CWS | Vina | 63 | Tehama County |
| Aberdeen Water System | CA1400020 | CWS | Crowley Lake | 43 | Inyo County |
| Abf Freight Water System | CA3901480 | NTNCWS | Fort Smith | 25 | San Joaquin County |
| Aborn Heights Water Mutual Association | CA4300792 | CWS | San Jose | 45 | Santa Clara County |
| Abrams Lake Mobile Estates | CA4700542 | CWS | Yorba Linda | 135 | Siskiyou County |
| Acampo Water System | CA3901303 | CWS | Stockton | 231 | San Joaquin County |
| Accelerated Charter High School | CA5400538 | NTNCWS | Tulare | 192 | Tulare County |
| Acorn Ridge Casino | 090600272 | NTNCWS | Plymouth | 3,640 | |
| Acton Conservation Camp #11 | CA1900904 | NTNCWS | Diamond Bar | 90 | Los Angeles County |
| Ada'S Lodges | CA4000839 | CWS | Paso Robles | 25 | San Luis Obispo County |
| Adair B.R. Cohn, Llc | CA4901144 | NTNCWS | Glen Ellen | 155 | Sonoma County |
| Adair Kunde, Llc | CA4901227 | NTNCWS | Kenwood | 250 | Sonoma County |
| Adair Viansa, Llc | CA4901129 | NTNCWS | Sonoma | 200 | Sonoma County |
| Adam'S Vegetable Oils | CA0605012 | NTNCWS | Arbuckle | 97 | Colusa County |
| Adelaida Vineyards & Winery | CA4000856 | NTNCWS | Paso Robles | 27 | San Luis Obispo County |
| Adesa Of Sacramento | CA3400429 | NTNCWS | Sacramento | 320 | Sacramento County |
| Adm Rice Inc. | CA0605004 | NTNCWS | Arbuckle | 91 | Colusa County |
| Adobe Christian Church | CA4901214 | NTNCWS | Petaluma | 50 | Sonoma County |
| Adventist Health - St. Helena Hospital | CA2800625 | CWS | St. Helena | 617 | Napa County |
| Aera Energy Llc Ws | CA2701187 | NTNCWS | San Ardo | 79 | Monterey County |
| Aera Energy-Llc | CA1500495 | NTNCWS | Mckittrick | 350 | Kern County |
| Aerial Acres Water Company, Inc. | CA1500405 | CWS | North Edwards | 87 | Kern County |
| Aeronautical Systems | CA3600797 | NTNCWS | Palmdale | 304 | San Bernardino County |
| Afuera De Chorro Water Company | CA4000744 | CWS | San Luis Obispo | 85 | San Luis Obispo County |
| Agape Mutual Water System | CA1500543 | CWS | Bakersfield | 50 | Kern County |
| Agate Bay Water Company | CA3110012 | CWS | Carnelian Bay | 2,500 | Placer County |
| Agbayani Village Water System | CA1500518 | CWS | Delano | 26 | Kern County |
| Agriland Farming | CA2000866 | NTNCWS | Chowchilla | 60 | Madera County |
| Aguirre Mhp | 090600033 | CWS | Indio | 60 | |
| Airport Commercial Plaza | CA4500230 | NTNCWS | Redding | 25 | Shasta County |
| Airport Industrial Park | CA4500274 | NTNCWS | Beverly Hills | 90 | Shasta County |
| Airport Planet Water | CA4500333 | NTNCWS | Redding | 81 | Shasta County |
| Airstreams Renewables | CA1502697 | NTNCWS | Tehachapi | 495 | Kern County |
| Alameda County Fairgrounds | CA0105020 | NTNCWS | Pleasanton | 82 | Alameda County |
| Alameda Point | CA0110016 | CWS | Oakland | 600 | Alameda County |
| Albion Mutual Water Company | CA2300502 | CWS | Albion | 26 | Mendocino County |
| Aldercroft Heights County Water District | CA4300516 | CWS | Los Gatos | 338 | Santa Clara County |
| Alderpoint County Water | CA1200501 | CWS | Alderpoint | 190 | Humboldt County |
| Alegria Domestic Mutual Water Company | CA4200731 | CWS | Gaviota | 54 | Santa Barbara County |
| Alexander Valley Acres Water Company | CA4900646 | CWS | Healdsburg | 27 | Sonoma County |
| Alexander Valley Union School District | CA4900704 | NTNCWS | Healdsburg | 200 | Sonoma County |
| Ali Mutual Water Co | CA5403144 | CWS | Tulare | 39 | Tulare County |
| Alianza Charter School/Wcsa | CA4400757 | NTNCWS | Watsonville | 670 | Santa Cruz County |
| Alisal Rd Ws #3 - 2262 Alisal Rd | CA2702519 | NTNCWS | Salinas | 25 | Monterey County |
| Allan Lane Water Association | CA4400692 | CWS | Corralitos | 54 | Santa Cruz County |
| Alleghany County W.D. | CA4600012 | CWS | Alleghany | 82 | Sierra County |
| Allen Road Mutual Water System | CA1500483 | CWS | Bakersfield | 195 | Kern County |
| Allensworth Csd | CA5400544 | CWS | Earlimart | 531 | Tulare County |
| Alliance Redwoods Conference Grounds | CA4900943 | CWS | Occidental | 46 | Sonoma County |
| Allied Waste Of Imperial Valley | CA1300668 | NTNCWS | Imperial | 45 | Imperial County |
| Almaden - Madera | CA2000641 | NTNCWS | 60 | Madera County | |
| Almira Water Association | CA4000631 | CWS | Paso Robles | 40 | San Luis Obispo County |
| Almond Grove Mobile Park | CA0400040 | CWS | Chico | 253 | Butte County |
| Almond Park Water System | CA3900517 | CWS | Stockton | 60 | San Joaquin County |
| Alpaugh Community Services District | CA5410050 | CWS | Alpaugh | 871 | Tulare County |
| Alpha Omega Winery | CA2801012 | NTNCWS | Saint Helena | 25 | Napa County |
| Alpine Acres Mutual Water Co | CA5500041 | CWS | Soulsbyville | 195 | Tuolumne County |
| Alpine Clinic (Sihc) | 090605115 | NTNCWS | Alpine | 220 | |
| Alpine Co Community Development | CA0205425 | NTNCWS | Markleeville | 30 | Alpine County |
| Alpine Early Learning Center | CA0202599 | NTNCWS | Markleeville | 35 | Alpine County |
| Alpine Meadows Property Owners Asso | CA3100041 | CWS | Colfax | 250 | Placer County |
| Alpine Meats Inc | CA3901080 | NTNCWS | Stockton | 270 | San Joaquin County |
| Alpine Oaks Estates Llc | CA3701988 | CWS | Dana Point | 185 | San Diego County |
| Alpine Springs County Water District | CA3110029 | CWS | Alpine Meadows | 200 | Placer County |
| Alpine Springs Mobile Home Park | CA1900942 | CWS | Palmdale | 175 | Los Angeles County |
| Alpine Village | CA3301491 | CWS | Romoland | 198 | Riverside County |
| Alpine Water Users Association | CA3610002 | CWS | Twin Peaks | 2,534 | San Bernardino County |
| Alta Elementary School | CA1000180 | NTNCWS | Reedley | 395 | Fresno County |
| Alta Sierra Mutual Water Co. | CA1500209 | CWS | Wofford Heights | 22 | Kern County |
| Alta Wind Project O&M Facility Water Sys | CA1503662 | NTNCWS | Mojave | 47 | Kern County |
| Altman Plants Ws #03 - Espinosa 303 | CA2700850 | NTNCWS | Salinas | 110 | Monterey County |
| Altman Plants Ws #04 -Esp 420 (Prev Cs1) | CA2700853 | NTNCWS | Salinas | 250 | Monterey County |
| Altman Plants Ws #05 -Esp 325 (Prev Cs2) | CA2702482 | NTNCWS | Salinas | 25 | Monterey County |
| Alturas Desert Rose Casino | 090600601 | NTNCWS | Alturas | 464 | |
| Alturas Fillmore Mhp | CA5601106 | CWS | Irvine | 99 | Ventura County |
| Alvarez Brothers Ws | CA2706552 | NTNCWS | Salinas | 70 | Monterey County |
| Alview School | CA2000598 | NTNCWS | Chowchilla | 211 | Madera County |
| Alvina School | CA1000181 | NTNCWS | Caruthers | 221 | Fresno County |
| Amarillo Mutual Water Company | CA1910002 | CWS | Rosemead | 3,134 | Los Angeles County |
| Amberwood Estates, Llc | CA4500200 | CWS | Stockton | 120 | Shasta County |
| American River College | CA3400278 | NTNCWS | Sacramento | 2,000 | Sacramento County |
| American Union School | CA1000204 | NTNCWS | Fresno | 250 | Fresno County |
| Amezcua - Garcia Water | CA3301990 | CWS | Thermal | 170 | Riverside County |
| Ananda Village | CA2900562 | CWS | Nevada City | 226 | Nevada County |
| Anderson Mobile Home Park | CA4500098 | CWS | Sacramento | 40 | Shasta County |
| Anderson Springs Csd | CA1700502 | CWS | Middletown | 373 | Lake County |
| Anderson Union High School | CA4500041 | NTNCWS | Anderson | 700 | Shasta County |
| Anderson Valley Elementary School | CA2300770 | NTNCWS | Boonville | 350 | Mendocino County |
| Anderson Valley High School | CA2300764 | NTNCWS | Boonville | 300 | Mendocino County |
| Andrade Border Station | 090400678 | NTNCWS | Calexico | 650 | |
| Andreini Business Park Water System | CA4500011 | NTNCWS | Redding | 130 | Shasta County |
| Andy'S Produce Market, Inc. | CA4901118 | NTNCWS | Sebastopol | 71 | Sonoma County |
| Angelique Maelee Properties | 090600043 | CWS | Indio | 50 | |
| Angelo Lane Water Company | CA4300578 | CWS | Gilroy | 40 | Santa Clara County |
| Angels Camp Rv/Camping Resort | CA0500082 | CWS | Angels Camp | 60 | Calaveras County |
| Angler S Ranch #3 | CA0707501 | CWS | Bethel Island | 60 | Contra Costa County |
| Anglers Subdivision 4 | CA0707569 | CWS | Bethel Island | 99 | Contra Costa County |
| Antelope Creek Mhp | CA5200521 | CWS | Los Moliinos | 175 | Tehama County |
| Antelope Oaks Water System | CA3107329 | NTNCWS | Fair Oaks | 50 | Placer County |
| Antelope Park Mutual Water Company | CA1900794 | CWS | Lancaster | 445 | Los Angeles County |
| Antelope Valley E Kern Wtr Agy-Rosamond | CA1510053 | CWS | Palmdale | 37,634 | Kern County |
| Antelope Valley East Kern Water Agency | CA1910045 | CWS | Palmdale | 0 | Kern County, Los Angeles County, San Bernardino County, Ventura County |
| Antelope Valley Mobile Estates | CA1500485 | CWS | South Pasadena | 60 | Kern County |
| Antoinette Mutual Water Co | CA5201140 | CWS | Red Bluff | 25 | Tehama County |
| Anza Mutual Water Company | CA3301180 | CWS | Anza | 224 | Riverside County |
| Anza Pines Mobile Home Park | CA3301018 | CWS | Anza | 90 | Riverside County |
| Anza Rv Resort | CA3301355 | CWS | Escondido | 203 | Riverside County |
| Anza Vineyard Estates Mutual Water Co | CA4000834 | CWS | Pismo Beach | 60 | San Luis Obispo County |
| Anzar High School | CA3500905 | NTNCWS | San Juan Bautista | 268 | San Benito County |
| Apple Ave Ws #02 | CA2701034 | CWS | Greenfield | 75 | Monterey County |
| Apple Valley Farms | CA5500371 | NTNCWS | Sonora | 40 | Tuolumne County |
| Apple Valley Foothill Cwd | CA3600008 | CWS | Apple Valley | 841 | San Bernardino County |
| Apple Valley Heights Cwd | CA3600009 | CWS | Apple Valley | 983 | San Bernardino County |
| Apple Valley View Mwc | CA3600012 | CWS | Apple Valley | 303 | San Bernardino County |
| Apple Valley Village Mhe | CA3600400 | CWS | Yorba Linda | 134 | San Bernardino County |
| Apricot Ln Ws | CA2702026 | CWS | Royal Oaks | 53 | Monterey County |
| Aptco Llc | CA5403022 | NTNCWS | Delano | 50 | Tulare County |
| Aptos High School | CA4400750 | NTNCWS | Watsonville | 1,348 | Santa Cruz County |
| Aptos Hills Mutual Water Co | CA4400634 | CWS | Watsonville | 32 | Santa Cruz County |
| Aptos Ridge Mutual Water Co | CA4400684 | CWS | Watsonville | 52 | Santa Cruz County |
| Aqua J. Mutual Water Company | CA1900936 | CWS | Lancaster | 158 | Los Angeles County |
| Arbor Mobile Home Park Ws | CA3900831 | CWS | Irvine | 340 | San Joaquin County |
| Arbuckle Public Utility District | CA0610001 | CWS | Arbuckle | 3,251 | Colusa County |
| Arcohe Elem School - Main Campus | CA3400271 | NTNCWS | Herald | 465 | Sacramento County |
| Arctic Cold | CA4200983 | NTNCWS | Santa Maria | 623 | Santa Barbara County |
| Ardagh Glass, Inc | CA2000660 | NTNCWS | Madera | 381 | Madera County |
| Arellano Mhp | 090600023 | CWS | Thermal | 30 | |
| Arlington Heights Mhp | CA3200127 | CWS | Live Oak | 33 | Plumas County |
| Armstrong Valley-Cal Water Service (Puc) | CA4910018 | CWS | San Jose | 539 | Sonoma County |
| Aromas Hills Mutual Water Association | CA3500576 | CWS | Aromas | 33 | San Benito County |
| Aromas Water District | CA3510004 | CWS | Aromas | 2,988 | Monterey County, San Benito County |
| Arrowbear Park Cwd | CA3610110 | CWS | Arrowbear Lake | 1,396 | San Bernardino County |
| Arrowhead Regional Medical Center | CA3601135 | NTNCWS | Colton | 4,500 | San Bernardino County |
| Arroyo Center Wc | CA2701658 | CWS | Greenfield | 130 | Monterey County |
| Arroyo Seco Estates Mws | CA2702520 | CWS | Soledad | 70 | Monterey County |
| Artesa Vineyards & Winery | CA2801008 | NTNCWS | Napa | 39 | Napa County |
| Artois Community S.D. | CA1100203 | CWS | Artois | 267 | Glenn County |
| Arviso - Mobile Home Park | 090605121 | CWS | Pauma Valley | 70 | San Diego County |
| Ashes & Diamonds Winery | CA2800047 | NTNCWS | Napa | 25 | Napa County |
| Ashford Highlands Mwc | CA3500900 | CWS | Hollister | 132 | San Benito County |
| Asoleado Mwc | CA2702148 | CWS | Carmel Valley | 101 | Monterey County |
| Aspendell Mutual Water Company | CA1400066 | CWS | Bishop | 60 | Inyo County |
| Assisi Mwc | CA2700503 | CWS | Salinas | 126 | Monterey County |
| Asti Winery | CA4901203 | NTNCWS | Healdsburg | 57 | Sonoma County |
| At&T California - Uer47 | CA3901258 | NTNCWS | Dallas | 30 | San Joaquin County |
| At&T Water System | CA5000588 | NTNCWS | Dallas | 80 | Stanislaus County |
| Athal Mutual Water System | CA1500289 | CWS | Bakersfield | 150 | Kern County |
| Athena Terrace Mutual Water Company | CA4900673 | CWS | Santa Rosa | 47 | Sonoma County |
| Atlas Business Park | CA5500259 | NTNCWS | Sonora | 206 | Tuolumne County |
| Auburn Ridge Woods | CA3100069 | CWS | Sacramento | 75 | Placer County |
| Auburn Valley Community Service Dis | CA3100011 | CWS | Auburn | 290 | Placer County |
| Auerbach Farms | CA3700044 | NTNCWS | Ramona | 68 | San Diego County |
| Augustine Casino | 090605142 | NTNCWS | Coachella | 950 | |
| Austin Acres Mutual Water Company | CA4900620 | CWS | Duncans Mills | 82 | Sonoma County |
| Austin Creek Mutual (Springhill) | CA4900630 | CWS | Cazadero | 150 | Sonoma County |
| Austin Industrial Park Water System | CA3901418 | NTNCWS | Modesto | 125 | San Joaquin County |
| Av Thomas Produce, Inc. | CA2400232 | NTNCWS | Livingston | 206 | Merced County |
| Avidwater, Llc | CA5000610 | NTNCWS | Veranalis | 25 | Stanislaus County |
| Avila Beach Community Services District | CA4000222 | CWS | Avila Beach | 1,630 | San Luis Obispo County |
| Avila Valley Mutual Water Co | CA4000716 | CWS | San Luis Obispo | 75 | San Luis Obispo County |
| Awa - Camanche Village | CA0310021 | CWS | Sutter Creek | 2,402 | Amador County |
| Awa - Tiger Creek Powerhouse | CA0300073 | NTNCWS | Sutter Creek | 32 | Amador County |
| Awa La Mel Heights #3 | CA0310019 | CWS | Sutter Creek | 188 | Amador County |
| Azcal Management Co | CA1600023 | CWS | Lemoore | 63 | Kings County |
| Azteca Milling Lp Valley Grain | CA2000682 | NTNCWS | Madera | 99 | Madera County |
| B & W Resort Marina | CA3400103 | CWS | Isleton | 100 | Sacramento County |
| B K Lighting Inc | CA2000794 | NTNCWS | Madera | 90 | Madera County |
| B&G Mobile Home Park Llc Ws | CA3900586 | CWS | Livermore | 50 | San Joaquin County |
| Badger Hill Estates | CA5400710 | CWS | Exeter | 278 | Tulare County |
| Bagdasarian Packing Thermal, Llc | CA3301935 | NTNCWS | Thermal | 250 | Riverside County |
| Baker Commodities Inc. | CA1000602 | NTNCWS | Kerman | 60 | Fresno County |
| Baker Commodities Inc. | CA1600605 | NTNCWS | Hanford | 47 | Kings County |
| Baker Community Services District | CA3600022 | CWS | Baker | 1,000 | San Bernardino County |
| Baker Ranch Water Corp | CA3100014 | CWS | Foresthill | 150 | Placer County |
| Baldy Mountain Ranch | CA3301028 | CWS | Mountain Center | 80 | Riverside County |
| Ball Tagawa Growers | CA4000209 | NTNCWS | Arroyo Grande | 60 | San Luis Obispo County |
| Ballico Csd | CA2400167 | CWS | Ballico | 238 | Merced County |
| Balls Ferry Fishing Resort | CA4500054 | CWS | Anderson | 204 | Shasta County |
| Baltimore Aircoiil Company | CA2000655 | NTNCWS | Madera | 280 | Madera County |
| Banning Hts. Mutual Water Co. | CA3301031 | CWS | Banning | 567 | Riverside County |
| Banta Elementary School | CA3901014 | NTNCWS | Banta | 200 | San Joaquin County |
| Bar H Mwc | CA3600027 | CWS | Lucerne Valley | 155 | San Bernardino County |
| Barajas Mhp | 090600031 | CWS | Thermal | 25 | |
| Baron Canyon Mutual Water Co. | CA4000214 | CWS | San Luis Obispo | 81 | San Luis Obispo County |
| Barona North | 090600118 | CWS | Lakeside | 1,171 | San Diego County |
| Barrett Lake Mh And Rv Llc | CA3700041 | CWS | Santee | 300 | San Diego County |
| Barstow Army Heliport | CA3610708 | NTNCWS | Fort Irwin | 150 | San Bernardino County |
| Barton Flats Water System | CA3601048 | CWS | Angelus Oaks | 11 | San Bernardino County |
| Basalite - Tracy | CA3901369 | NTNCWS | Dixon | 86 | San Joaquin County |
| Bass Lake Annex 3 | CA2000501 | CWS | Wishon | 42 | Madera County |
| Bass Lake Heights Mutual Water | CA2000502 | CWS | Oakhurst | 250 | Madera County |
| Bassi Ranch Mutual Water Co. | CA4000200 | CWS | Grover Beach | 85 | San Luis Obispo County |
| Bates Elementary School | CA3400267 | NTNCWS | Rio Vista | 375 | Sacramento County |
| Baumann Rd Ws #01 | CA2700842 | CWS | Watsonville | 48 | Monterey County |
| Bautista Cc No. 36 | CA3310801 | CWS | Hemet | 73 | Riverside County |
| Bay Standards | CA0706102 | NTNCWS | Brentwood | 41 | Contra Costa County |
| Baycliff Water | CA1700606 | CWS | Lower Lake | 70 | Lake County |
| Bayer Research And Development Llc | CA3500804 | NTNCWS | Woodland | 35 | San Benito County |
| Bayer Research And Development Llc | CA5700785 | NTNCWS | Woodland | 140 | Yolo County |
| Bdvwa - Goat Mountain Id | CA3610060 | CWS | Yucca Valley | 1,118 | San Bernardino County |
| Beach Creek Mobile Home Park | CA1200643 | CWS | Sebastopol | 67 | Humboldt County |
| Bear Creek Winery | CA3901404 | NTNCWS | Lodi | 25 | San Joaquin County |
| Bear River - Tish Non Village | 090605119 | CWS | Loleta | 650 | Humboldt County |
| Bear River/Singley Hill | 090605125 | CWS | Loleta | 1,530 | |
| Bear State Water Works | CA0901217 | CWS | Georgetown | 100 | El Dorado County |
| Bear Valley Mhp | CA3601045 | CWS | Apple Valley | 150 | San Bernardino County |
| Bear Valley Water Company | CA4000660 | CWS | San Luis Obispo | 45 | San Luis Obispo County |
| Beaulieu Vineyard | CA2803912 | NTNCWS | St. Helena | 100 | Napa County |
| Bedel Mutual Water Company | CA5400816 | CWS | Visalia | 155 | Tulare County |
| Beedy Water Company, Llc | CA5602133 | NTNCWS | Camarillo | 35 | Ventura County |
| Bel Air Mobile Estate | CA3900907 | CWS | Stockton | 325 | San Joaquin County |
| Bella Lago Mobile Home Park | CA1700610 | CWS | San Jose | 152 | Lake County |
| Bella Shores Mobile Home Park | CA2300646 | CWS | Sacramento | 80 | Mendocino County |
| Bella Union Winery | CA2801073 | NTNCWS | St. Helena | 238 | Napa County |
| Bella Vista Mutual Water Company | CA1502653 | CWS | Weldon | 150 | Kern County |
| Bella Vista Water Sys | CA0707589 | CWS | Moraga | 93 | Contra Costa County |
| Belleview Oaks Mutual Water Co | CA5500042 | CWS | Sonora | 468 | Tuolumne County |
| Bellevue Union Sch Dist-Bellevue School | CA4900693 | NTNCWS | Santa Rosa | 380 | Sonoma County |
| Bellflower Home Garden Water Company | CA1910012 | CWS | Bellflower | 1,129 | Los Angeles County |
| Belmont Country Club | CA1000473 | NTNCWS | Fresno | 150 | Fresno County |
| Belmont Terrace Mutual Water Company | CA4900558 | CWS | Sebastopol | 287 | Sonoma County |
| Belmont Water Corporation | CA1000004 | CWS | Fresno | 132 | Fresno County |
| Bend Elementary School | CA5200511 | NTNCWS | Cottonwood | 100 | Tehama County |
| Bend Mobilehome & Rv Park | CA5200512 | CWS | Red Bluff | 99 | Tehama County |
| Bennett Ridge Mutual Water Company | CA4900585 | CWS | Santa Rosa | 439 | Sonoma County |
| Benzeen Auto Parts | CA5800915 | NTNCWS | Rancho Cordova | 45 | Yuba County |
| Benziger Family Winery | CA4901204 | NTNCWS | Glen Ellen | 25 | Sonoma County |
| Beringer Vineyards | CA2801070 | NTNCWS | St. Helena | 300 | Napa County |
| Bermuda Palms | 090600130 | CWS | Parker | 172 | San Bernardino County |
| Bernasconi Education Center | CA1400064 | NTNCWS | Independence | 3 | Inyo County |
| Berrendos School | CA5200507 | NTNCWS | Red Bluff | 325 | Tehama County |
| Berry Creek Community Service Dist | CA0400016 | CWS | Oroville | 28 | Butte County |
| Berry Creek School | CA0400068 | NTNCWS | Berry Creek | 65 | Butte County |
| Berry Dr Ws #02 | CA2701897 | CWS | Salinas | 40 | Monterey County |
| Berryessa Estates (Lbrid) | CA2800526 | CWS | Napa | 474 | Napa County |
| Berryessa Highlands | CA2810013 | CWS | Napa | 715 | Napa County |
| Berryessa Pines Water System | CA2810009 | CWS | Napa | 261 | Napa County |
| Bertsch Ocean View Csd | CA0810003 | CWS | Crescent City | 2,669 | Del Norte County |
| Betabel Rv Resort | CA3500836 | CWS | San Juan Bautista | 102 | San Benito County |
| Bethel Island Estates | CA0707523 | CWS | Sacramento | 200 | Contra Costa County |
| Bethel Island Mhc | CA0707575 | CWS | Stockton | 185 | Contra Costa County |
| Bethel Island Mutual Water Co | CA0707572 | CWS | Bethel Island | 123 | Contra Costa County |
| Better Cooling Produce | CA4200947 | NTNCWS | Santa Maria | 35 | Santa Barbara County |
| Bianchi Flowers Inc | CA4100583 | CWS | Pescadero | 65 | San Mateo County |
| Bible Baptist Academy | CA5800810 | NTNCWS | Marysville | 45 | Yuba County |
| Big Basin Water Company | CA4410001 | CWS | Irvine | 1,120 | Santa Cruz County |
| Big Bear Administration | CA3601150 | NTNCWS | San Bernardino | 75 | San Bernardino County, San Diego County |
| Big Creek Community Serv Dist | CA1000005 | CWS | Big Creek | 38 | Fresno County |
| Big Creek Lumber Company | CA4400800 | NTNCWS | Davenport | 65 | Santa Cruz County |
| Big Lagoon Csd | CA1200592 | CWS | Trinidad | 112 | Humboldt County |
| Big Lagoon Park Water Co. | CA1200591 | CWS | Eureka | 20 | Humboldt County |
| Big Oak Mobile Home Park Water | CA0707588 | CWS | Oakley | 156 | Contra Costa County |
| Big Pine Csd | CA1410006 | CWS | Big Pine | 798 | Inyo County |
| Big Pine Paiute Band | 090600120 | CWS | Big Pine | 600 | Inyo County |
| Big Pine Tract | CA3600031 | CWS | Yucaipa | 300 | San Bernardino County |
| Big Redwood Park Water | CA4400526 | CWS | Felton | 182 | Santa Cruz County |
| Big Rise Village | CA4500102 | CWS | Granite Bay | 78 | Shasta County |
| Big River Development | 090600226 | CWS | Big River | 3,550 | San Bernardino County |
| Big River Vista Mutual Water Company | CA2300596 | CWS | Mendocino | 36 | Mendocino County |
| Big Rock C.S.D. | CA0800532 | CWS | Crescent City | 513 | Del Norte County |
| Big Sandy Rancheria | 090600121 | CWS | Auberry | 408 | Fresno County |
| Big Springs Mutual Water System | CA4500027 | CWS | Old Station | 25 | Shasta County |
| Big Springs Union Elem. School | CA4700577 | NTNCWS | Montague | 95 | Siskiyou County |
| Big Valley Rancheria Water District | 090605164 | CWS | Lakeport | 417 | Lake County |
| Big Wheel Mobile Home Park | CA3900637 | CWS | Stockton | 120 | San Joaquin County |
| Bighorn - Desert View Water Agency | CA3610009 | CWS | Yucca Valley | 3,916 | San Bernardino County |
| Biola Community Services Dist | CA1010049 | CWS | Biola | 1,427 | Fresno County |
| Birchim Community Service District | CA2600501 | CWS | Toms Place | 150 | Mono County |
| Bird Industrial Complex | CA1400503 | NTNCWS | Bishop | 30 | Inyo County |
| Bishop Paiute-Shoshone Tribe | 090600122 | CWS | Bishop | 2,735 | Inyo County |
| Bitney Springs Center Water System | CA2900563 | NTNCWS | Nevada City | 606 | Nevada County |
| Black Butte Elementary School | CA4500183 | NTNCWS | Shingletown | 250 | Shasta County |
| Black Butte Junior High School | CA4500322 | NTNCWS | Shingletown | 100 | Shasta County |
| Black Rascal Water Company | CA2400046 | CWS | Merced | 367 | Merced County |
| Blackhawk Center Water System | CA2000848 | NTNCWS | Coarsegold | 50 | Madera County |
| Blackie Rd Ws #05 | CA2700837 | CWS | Salinas | 78 | Monterey County |
| Blairsden Water Users Assn | CA3200134 | CWS | Blairsden | 200 | Plumas County |
| Bleich Flats Mutual | CA1900075 | CWS | Lancaster | 36 | Los Angeles County |
| Blossom Trail Cafe | CA1000517 | NTNCWS | Sanger | 318 | Fresno County |
| Blue Lakes Improvement Club | CA1700561 | CWS | Upper Lake | 90 | Lake County |
| Blue Lakes Mobile Home Park | CA1700589 | CWS | San Mateo | 31 | Lake County |
| Blue Lakes Village | CA1700596 | CWS | Santa Rosa | 65 | Lake County |
| Blue Mountain Center | CA2100549 | CWS | Tomales | 25 | Marin County |
| Blue Oak Terrace Mutual | CA0409181 | CWS | Chico | 81 | Butte County |
| Blue Skies Mobile Home Park | CA1900055 | CWS | Arcadia | 56 | Los Angeles County |
| Blue Spruce Mobile Home Park | CA4900789 | CWS | Sacramento | 90 | Sonoma County |
| Bluebell Valley Mwc | CA5500040 | CWS | Standard | 252 | Tuolumne County |
| Bluetriton Brands Morongo | 090600061 | NTNCWS | Ontario | 200 | |
| Bluffs Ws | CA2701740 | CWS | Salinas | 120 | Monterey County |
| Blythe - Hidden Beaches | CA3301630 | CWS | Blythe | 399 | Riverside County |
| Blythe - Mesa Ranch | CA3301428 | CWS | Blythe | 568 | Riverside County |
| Blythe Mobile Home Estates | CA3301045 | CWS | Valley Center | 35 | Riverside County |
| Bob Wiley Detention Facility | CA5401074 | NTNCWS | Visalia | 1,130 | Tulare County |
| Bobcat Springs Mutual Water Company | CA4200891 | CWS | Buellton | 115 | Santa Barbara County |
| Bodega Bay Public Utility District | CA4910021 | CWS | Bodega Bay | 1,069 | Sonoma County |
| Bodega Water Company | CA4900850 | CWS | Bodega | 77 | Sonoma County |
| Boething Treeland Farms Inc | CA3901350 | NTNCWS | Lodi | 222 | San Joaquin County |
| Bogle Family Limited Partner | CA5700514 | NTNCWS | Clarksburg | 69 | Yolo County |
| Bogle Vineyards Tasting Room | CA5700523 | NTNCWS | Clarksburg | 29 | Yolo County |
| Bolthouse Fresh Foods | CA1503349 | NTNCWS | Bakersfield | 1,917 | Kern County |
| Bonadelle Ranchos No. 2 Mutual Water Co | CA2000529 | CWS | Madera | 89 | Madera County |
| Bonfire Village Hotel | CA5700555 | CWS | Sacramento | 25 | Yolo County |
| Bonita School | CA4200833 | NTNCWS | Santa Maria | 589 | Santa Barbara County |
| Bonny Doon School | CA4400751 | NTNCWS | Santa Cruz | 160 | Santa Cruz County |
| Booker Winery | CA4000846 | NTNCWS | Paso Robles | 56 | San Luis Obispo County |
| Booth Ranches Llc | CA5403211 | NTNCWS | Orange Cove | 150 | Tulare County |
| Bornt 1992 Irrevocable Trust | CA1300653 | NTNCWS | Holtville | 30 | Imperial County |
| Boron Csd | CA1510002 | CWS | Boron | 2,086 | Kern County |
| Boulevard Heights Mutual Water | CA4901071 | CWS | Petaluma | 60 | Sonoma County |
| Box Springs Mutual Wc | CA3310004 | CWS | Moreno Valley | 3,382 | Riverside County |
| Bracken Brae Country Club | CA4400604 | CWS | Boulder Creek | 52 | Santa Cruz County |
| Bradford Run Rv | CA3301171 | CWS | Aguanga | 75 | Riverside County |
| Bradley Union School Ws | CA2700964 | NTNCWS | Bradley | 100 | Monterey County |
| Bradley-Lockwood Rd Ws | CA2701701 | CWS | Lockwood | 25 | Monterey County |
| Branch Center [Sws] | CA3400180 | NTNCWS | Sacramento | 1,700 | Sacramento County |
| Branch Elementary School | CA4000675 | NTNCWS | Arroyo Grande | 253 | San Luis Obispo County |
| Brand Water Company | CA4900587 | CWS | Oakland | 112 | Sonoma County |
| Brandeis Bardin Institute | CA5603301 | CWS | Simi Valley | 665 | Ventura County |
| Brandon Creek Mws | CA2701731 | CWS | Carmel | 41 | Monterey County |
| Brandt Cattle | CA1300685 | NTNCWS | Calipatria | 50 | Imperial County |
| Brandt Farms, Inc | CA5403138 | NTNCWS | Reedley | 100 | Tulare County |
| Branger Mutual Water Company, Inc. | CA4900545 | CWS | Santa Rosa | 300 | Sonoma County |
| Branscomb Mobile Home Park | CA2300663 | CWS | Rohnert Park | 42 | Mendocino County |
| Breese Subdivision 2 | CA5200008 | CWS | Red Bluff | 75 | Tehama County |
| Brethren Heritage School, Inc | CA5000335 | NTNCWS | Modesto | 55 | Stanislaus County |
| Briceland C.S.D. | CA1200587 | CWS | Garberville | 75 | Humboldt County |
| Bridgehaven Park | CA4900644 | CWS | Sacramento | 30 | Sonoma County |
| Bridgeport Pud | CA2610003 | CWS | Bridgeport | 374 | Mono County |
| Bridgeville Elem. School | CA1200778 | NTNCWS | Bridgeville | 50 | Humboldt County |
| Brite Lake Mutual Water Company | CA1500489 | CWS | Tehachapi | 89 | Kern County |
| Britz/Colusa | CA1009023 | CWS | Fresno | 40 | Fresno County |
| Britz/Five Points | CA1009179 | CWS | Fresno | 76 | Fresno County |
| Broadview Terrace Mutual Water Company | CA2000521 | CWS | Oakhurst | 498 | Madera County |
| Brock Mutual Water Company | CA1500409 | CWS | Bakersfield | 462 | Kern County |
| Bronco Winery | CA5000286 | NTNCWS | Ceres | 400 | Stanislaus County |
| Brookside Estates Mutual Water Company | CA1400056 | CWS | Bishop | 59 | Inyo County |
| Brookside Mhp | CA3600385 | CWS | Mentone | 65 | San Bernardino County |
| Brookside Mobile Home Park | CA1400059 | CWS | Costa Mesa | 126 | Inyo County |
| Browns Elementary School | CA5100138 | NTNCWS | Rio Oso | 160 | Sutter County |
| Brush And Old Well Mutual Water Company | CA4300978 | CWS | Los Gatos | 70 | Santa Clara County |
| Btqc-Escalon | CA3900796 | NTNCWS | Ceres | 110 | San Joaquin County |
| Bucher Water Company | CA4901277 | NTNCWS | Healdsburg | 52 | Sonoma County |
| Buckingham Park Water District | CA1710011 | CWS | Kelseyville | 1,502 | Lake County |
| Buckley Family Partnership | CA4901345 | NTNCWS | Sonoma | 30 | Sonoma County |
| Bucktail Mutual Water Company | CA5301001 | CWS | Napa | 42 | Trinity County |
| Bud Antle, Llc- Marina Facility Ws | CA2700998 | NTNCWS | Monterey | 151 | Monterey County |
| Bud Antle, Llc-Soledad Facility Ws | CA2702412 | NTNCWS | Monterey | 900 | Monterey County |
| Buehner Houses | CA5000297 | CWS | Tracy | 25 | Stanislaus County |
| Buehner Water System | CA5000313 | CWS | Tracy | 150 | Stanislaus County |
| Buena Vista Elementary School | CA5400919 | NTNCWS | Tulare | 250 | Tulare County |
| Buena Vista Migrant Center | CA4400763 | CWS | Modesto | 455 | Santa Cruz County |
| Buena Vue Casino | 090605117 | NTNCWS | Sacramento | 3,150 | |
| Buhach Preschool (Kindercare) | CA2400134 | NTNCWS | Atwater | 115 | Merced County |
| Burchell Road Water Association | CA4300567 | CWS | Gilroy | 65 | Santa Clara County |
| Burlando Heights Mutual Water Co. | CA1500336 | CWS | Kernville | 44 | Kern County |
| Burlington Northern Santa Fe | CA3901407 | NTNCWS | San Bernardino | 25 | San Joaquin County |
| Burney Water District | CA4510003 | CWS | Burney | 3,000 | Shasta County |
| Burnt Ranch Estates | CA5304109 | CWS | Burnt Ranch | 115 | Trinity County |
| Burnt Ranch School | CA5304105 | NTNCWS | Burnt Ranch | 125 | Trinity County |
| Burrel Union Elementary School | CA1000182 | NTNCWS | Burrel | 178 | Fresno County |
| Burtch Construction | CA1503104 | NTNCWS | Bakersfield | 25 | Kern County |
| Butano Canyon Mutual | CA4100503 | CWS | Pescadero | 150 | San Mateo County |
| Butte City Community S.D. | CA1100711 | CWS | Butte City | 75 | Glenn County |
| Butte Court Mobile Home Park | CA0800603 | CWS | Mather | 65 | Del Norte County |
| Butte Creek Estates Mutual Water Co | CA0400007 | CWS | Chico | 399 | Butte County |
| Butterfield Ranch | CA3701184 | CWS | San Diego | 350 | San Diego County |
| Butteville Union School | CA4700559 | NTNCWS | Edgewood | 165 | Siskiyou County |
| Buttonwillow Cwd | CA1510011 | CWS | Buttonwillow | 1,337 | Kern County |
| Cabana Holiday Ws | CA2700522 | CWS | Irvine | 400 | Monterey County |
| Cabazon Water District | CA3310047 | CWS | Cabazon | 1,900 | Riverside County |
| Cachagua Comm Ctr Ws | CA2702595 | NTNCWS | Carmel | 25 | Monterey County |
| Cachagua Mutual Ws (#4) | CA2701888 | CWS | Carmel Valley | 55 | Monterey County |
| Cacheville Service Dist | CA5700700 | CWS | Woodland | 239 | Yolo County |
| Cachuma Project | CA4210028 | CWS | Santa Barbara | 0 | Santa Barbara County |
| Cachuma Village | CA4200505 | CWS | Santa Barbara | 60 | Santa Barbara County |
| Cahuilla Casino | 090605144 | NTNCWS | Anza | 515 | |
| Caillier Water System | CA3600062 | NTNCWS | Boron | 1,034 | San Bernardino County |
| Cakebread Cellar | CA2801075 | NTNCWS | Rutherford | 100 | Napa County |
| Cal 20 Village And Meadow Pointe Park | CA1700595 | CWS | Stockton | 255 | Lake County |
| Cal Am - Coarsegold | CA2010013 | CWS | Sacramento | 93 | Madera County |
| Cal Am - Dunnigan | CA5700712 | CWS | Sacramento | 602 | Yolo County |
| Cal Am - Goldside | CA2010014 | CWS | Sacramento | 1,053 | Madera County |
| Cal Am - Isleton | CA3410012 | CWS | Sacramento | 1,693 | Sacramento County |
| Cal Am - Raymond | CA2010012 | CWS | Sacramento | 347 | Madera County |
| Cal Am - Security Park | CA3410027 | NTNCWS | Sacramento | 123 | Sacramento County |
| Cal Am - Walnut Grove | CA3410047 | CWS | Sacramento | 667 | Sacramento County |
| Cal Am - West San Martin | CA4300543 | CWS | Pacific Grove | 1,079 | Santa Clara County |
| Cal Am Water Company - Ambler Park | CA2710006 | CWS | Pacific Grove | 1,370 | Monterey County |
| Cal Am Water Company - Chualar | CA2701202 | CWS | Pacific Grove | 647 | Monterey County |
| Cal Am Water Company - Garrapata | CA2701257 | CWS | Pacific Grove | 152 | Monterey County |
| Cal Am Water Company - Hidden Hills | CA2710022 | CWS | Pacific Grove | 1,521 | Monterey County |
| Cal Am Water Company - Ralph Lane | CA2702004 | CWS | Pacific Grove | 92 | Monterey County |
| Cal Am Water Company - Toro | CA2710021 | CWS | Pacific Grove | 1,442 | Monterey County |
| Cal American - Yerba Buena | CA5610006 | CWS | Rosemead | 690 | Ventura County |
| Cal American Water Company - Piru | CA5610021 | CWS | Rosemead | 2,023 | Ventura County |
| Cal American Wc - Las Posas Estates | CA5610081 | CWS | Rosemead | 2,043 | Ventura County |
| Cal American Wc - Rio Plaza | CA5610010 | CWS | Rosemead | 1,712 | Ventura County |
| Cal Fire - Ishi Conservation Camp | CA5210800 | NTNCWS | Paynes Creek | 135 | Tehama County |
| Cal Fire - Miramonte Conservation Camp | CA1010800 | CWS | Miramonte | 52 | Fresno County |
| Cal Fire - Mountain Home Cnsrvtn Camp | CA5410800 | CWS | Springville | 55 | Tulare County |
| Cal Fire - Salt Creek Conservation Camp | CA5210801 | NTNCWS | Paynes Creek | 130 | Tehama County |
| Cal Fire - Sugar Pine Conservation Camp | CA4510800 | NTNCWS | Bella Vista | 60 | Shasta County |
| Cal Fire - Valley View C.C | CA1110800 | NTNCWS | Elk Creek | 140 | Glenn County |
| Cal Fire Baseline Conservation Camp | CA5510852 | CWS | Jamestown | 150 | Tuolumne County |
| Cal Fire Sonoma-Lake-Napa Unit Hq | CA2810302 | NTNCWS | St. Helena | 65 | Napa County |
| Cal Fire-Deadwood Conservation Camp | CA4710800 | NTNCWS | Fort Jones | 65 | Siskiyou County |
| Cal Fire-Devil'S Garden Camp | CA2510800 | NTNCWS | Alturas | 120 | Modoc County |
| Cal Fire-Eel River Conservation Camp | CA1210800 | NTNCWS | Redway | 100 | Humboldt County |
| Cal Fire-High Rock Conservation Camp | CA1210801 | NTNCWS | Redway | 80 | Humboldt County |
| Cal Fire-Intermountain Conservation Camp | CA1810801 | NTNCWS | Bieber | 108 | Lassen County |
| Cal Fire-Trinity River Conservation Camp | CA5310800 | NTNCWS | Lewiston | 120 | Trinity County |
| Cal Ore Mobile Estates | CA4700546 | CWS | Yorba Linda | 146 | Siskiyou County |
| Cal Trans Chp Chowchilla River Facility | CA2400216 | NTNCWS | Stockton | 25 | Merced County |
| Cal-Water Service Co.-Hamilton City | CA1110002 | CWS | San Jose | 1,575 | Glenn County |
| Calbee America Incorporated | CA2000507 | NTNCWS | Madera | 244 | Madera County |
| Calenergy (Administrative) | CA1300635 | NTNCWS | Calipatria | 48 | Imperial County |
| Calenergy (Eng. & Tech.) | CA1300642 | NTNCWS | Calipatria | 25 | Imperial County |
| Calenergy (Salton Sea Unit No Iii) | CA1300637 | NTNCWS | Calipatria | 37 | Imperial County |
| Calenergy (Vulcan Power Plant) | CA1300638 | NTNCWS | Calipatria | 108 | Imperial County |
| Calera Canyon Heights Hoa | CA2700523 | CWS | Salinas | 40 | Monterey County |
| Calfire-Alder Conservation Camp | CA0810800 | NTNCWS | Klamath | 135 | Del Norte County |
| Calgren Renewable Fuels | CA5403132 | NTNCWS | Pixley | 60 | Tulare County |
| Cali Lake Rv Resort | CA1900975 | CWS | Alta Loma | 99 | Los Angeles County |
| Calico Ghost Town | CA3600036 | NTNCWS | San Bernardino | 24 | San Bernardino County |
| Calico Lake Homeowners | CA3601036 | CWS | Hesperia | 150 | San Bernardino County |
| Califia Farms Water System | CA1503685 | NTNCWS | Bakersfield | 200 | Kern County |
| California Citrus Association | CA5403106 | NTNCWS | Exeter | 96 | Tulare County |
| California Conservation Camp #14 | CA1900007 | CWS | Diamond Bar | 107 | Los Angeles County |
| California Dairies Inc Tipton | CA5403042 | NTNCWS | Tipton | 160 | Tulare County |
| California Domestic Water Company | CA1910199 | CWS | Whittier | 0 | Los Angeles County |
| California Institution For Women | CA3610851 | CWS | Corona | 1,035 | San Bernardino County |
| California Nut Company | CA5000527 | NTNCWS | Denair | 30 | Stanislaus County |
| California Olive Ranch | CA1105006 | NTNCWS | Chico | 50 | Glenn County |
| California Orchard Ws | CA2701742 | CWS | King City | 150 | Monterey County |
| California Pines C.S.D. | CA2500503 | CWS | Alturas | 431 | Modoc County |
| California Portland Cement | CA1502034 | NTNCWS | Mojave | 200 | Kern County |
| California Resources Elk Hills | CA1503440 | NTNCWS | Bakersfield | 500 | Kern County |
| California Walnuts | CA5200809 | NTNCWS | Los Molinos | 30 | Tehama County |
| California Water Service Co-Lake Hughes | CA1910242 | CWS | San Jose | 732 | Los Angeles County |
| California Water Service Co-Leona Valley | CA1910243 | CWS | San Jose | 895 | Los Angeles County |
| Californian Mobile Home Park | CA1900843 | CWS | Rancho Cucamonga | 414 | Los Angeles County |
| Calipaso Winery | CA4000874 | NTNCWS | Paso Robles | 130 | San Luis Obispo County |
| Calistoga Farm Worker Center | CA2800039 | CWS | Napa | 67 | Napa County |
| Callahan Water District | CA4700503 | CWS | Callahan | 70 | Siskiyou County |
| Callayomi County Water District | CA1710013 | CWS | Middletown | 1,607 | Lake County |
| Calleguas Municipal Water Dist | CA5610050 | CWS | Thousand Oaks | 0 | Ventura County |
| Callender Grove Mutual Water | CA4000805 | CWS | San Luis Obispo | 116 | San Luis Obispo County |
| Calpella County Water District | CA2300507 | CWS | Ukiah | 548 | Mendocino County |
| Calpine (Geysers Administration Center) | CA4901030 | NTNCWS | Middletown | 150 | Sonoma County |
| Calpine (West Field Office) | CA4901004 | NTNCWS | Middletown | 26 | Sonoma County |
| Calportland Oro Grande Plant | CA3601061 | NTNCWS | Oro Grande | 150 | San Bernardino County |
| Caltrans - Mountain Pass Jpoe Cvef | CA3610130 | NTNCWS | San Bernardino | 49 | San Bernardino County |
| Caltrans Visalia Maintenance Station | CA5401044 | NTNCWS | Fresno | 41 | Tulare County |
| Caltrans-Cottonwood Truck Insp. Fac. | CA5205006 | NTNCWS | Redding | 35 | Tehama County |
| Caltrans-Dunsmuir Grade Cvef | CA4700573 | NTNCWS | Yreka | 25 | Siskiyou County |
| Calva Products Co Inc | CA3901394 | NTNCWS | Acampo | 50 | San Joaquin County |
| Calvary Chapel Christian Camp | CA3600595 | NTNCWS | Green Valley Lake | 34 | San Bernardino County |
| Calvary Chapel Church | CA1300661 | NTNCWS | El Centro | 40 | Imperial County |
| Calvary Chapel Of Red Bluff | CA5200524 | NTNCWS | Red Bluff | 110 | Tehama County |
| Calvary Church Inc Ws | CA2700703 | NTNCWS | Salinas | 68 | Monterey County |
| Calwest Rain - Kerman | CA1000639 | NTNCWS | Raymond | 90 | Fresno County |
| Camanche North Shore Inc. | CA0310008 | CWS | Valley Springs | 205 | Amador County |
| Camanche South Shore-Ebmud | CA0510012 | CWS | Valley Springs | 111 | Calaveras County |
| Cambria Winery | CA4200930 | NTNCWS | Santa Maria | 30 | Santa Barbara County |
| Camden Trailer Park | CA1000238 | CWS | Fresno | 75 | Fresno County |
| Camino Mobilehome | CA0707598 | CWS | Oakley | 210 | Contra Costa County |
| Camp Denver Fox | CA3700880 | NTNCWS | Santa Ysabel | 86 | San Diego County |
| Camp Jones Gulch | CA4100538 | CWS | La Honda | 44 | San Mateo County |
| Camp Loma Mar | CA4100529 | CWS | Oakland | 25 | San Mateo County |
| Camp Meeker Water System | CA4910029 | CWS | Camp Meeker | 1,171 | Sonoma County |
| Camp Nelson Water Company | CA5410022 | CWS | Springville | 55 | Tulare County |
| Camp Owen Water System | CA1502315 | CWS | Kernville | 35 | Kern County |
| Camp Roberts - California National Guard | CA2710705 | NTNCWS | Camp Roberts | 385 | Monterey County, San Luis Obispo County |
| Camp Saratoga | CA4300834 | CWS | Saratoga | 450 | Santa Clara County |
| Camp Scheideck | CA5601135 | NTNCWS | Ojai | 33 | Ventura County |
| Camp Stevens | CA3700906 | CWS | Julian | 28 | San Diego County |
| Camp Waterman Mwc | CA3600064 | CWS | San Bernardino | 55 | San Bernardino County |
| Camp Williams-Resort Water | CA1900529 | CWS | Manhattan Beach | 80 | Los Angeles County |
| Campbell Soup Dixon | CA4800727 | NTNCWS | Dixon | 25 | Solano County |
| Campers Inn - Rv & Golf Course | CA5700554 | CWS | Alamo | 95 | Yolo County |
| Camphora Apartments | CA2701046 | CWS | Hayward | 126 | Monterey County |
| Camphora Station Ws | CA2701579 | NTNCWS | Salinas | 45 | Monterey County |
| Campo Casino (Golden Acorn Casino) | 090605158 | NTNCWS | Campo | 1,000 | |
| Campo Church Road System (Hud Homes) | 090605045 | CWS | Campo | 400 | San Diego County |
| Campo Elementary School | CA3700018 | NTNCWS | Pine Valley | 300 | San Diego County |
| Campo Hills-County Public Works Wastewtr | CA3710047 | CWS | Spring Valley | 500 | San Diego County |
| Campos Bros. Farms | CA1000580 | NTNCWS | Caruthers | 350 | Fresno County |
| Camptonville Community Serv Dist | CA5800924 | CWS | Camptonville | 180 | Yuba County |
| Candlelight Village Mutual Water Co. | CA0900112 | CWS | Somerset | 75 | El Dorado County |
| Canon Manor Water System | CA4910022 | CWS | Santa Rosa | 828 | Sonoma County |
| Cantua Creek Vineyards, Iv, Llc. | CA1009051 | CWS | Ceres | 55 | Fresno County |
| Canyon Creek Mhp | CA4500093 | CWS | Redding | 35 | Shasta County |
| Canyon Creek Outdoor Education Center | CA1900162 | NTNCWS | Los Angeles | 177 | Los Angeles County |
| Canyon Crest Mutual Benefit Wc | CA4000230 | CWS | Arroyo Grande | 133 | San Luis Obispo County |
| Canyon Meadows Mutual Water | CA1500443 | CWS | Bodfish | 465 | Kern County |
| Canyon Rv Park | CA3000759 | NTNCWS | Tustin | 24 | Orange County |
| Canyon School | CA0707620 | NTNCWS | Canyon | 80 | Contra Costa County |
| Capay Joint Union Elem. School | CA1100527 | NTNCWS | Orland | 230 | Glenn County, Tehama County |
| Capell Valley Estates | CA2800543 | CWS | Stockton | 208 | Napa County |
| Capital Lumber Company | CA4901257 | NTNCWS | Healdsburg | 50 | Sonoma County |
| Captain Cooper School Ws | CA2702322 | NTNCWS | Carmel | 82 | Monterey County |
| Capurro & Son Ws | CA2702296 | NTNCWS | Moss Landing | 64 | Monterey County |
| Cardinale Estate | CA2801028 | NTNCWS | Oakville | 48 | Napa County |
| Cardoza Villa Corp | CA3900921 | CWS | Manteca | 30 | San Joaquin County |
| Caribou Mobile Park Pws | CA3900568 | CWS | Stockton | 180 | San Joaquin County |
| Carlsbad Desalination Plant | CA3710045 | CWS | Carlsbad | 0 | San Diego County |
| Carmel Riviera Mwc | CA2701254 | CWS | Carmel | 584 | Monterey County |
| Carmelo Industrial Park | CA3901305 | NTNCWS | Tracy | 50 | San Joaquin County |
| Carmet By The Sea Water Company | CA4900578 | CWS | Bodega Bay | 188 | Sonoma County |
| Carneros Deli | CA4900909 | NTNCWS | Sonoma | 29 | Sonoma County |
| Carneros Warehousing | CA4901247 | NTNCWS | Sonoma | 50 | Sonoma County |
| Carriere Family Farms | CA1100101 | NTNCWS | Glenn | 37 | Glenn County |
| Carrisa Plains Elementary | CA4000732 | NTNCWS | Atascadero | 40 | San Luis Obispo County |
| Carson Landscape Industries | CA3400434 | NTNCWS | Sacramento | 175 | Sacramento County |
| Cartago Mutual Water Company | CA1400027 | CWS | Bishop | 132 | Inyo County |
| Caruthers Comm Serv Dist | CA1010039 | CWS | Caruthers | 2,613 | Fresno County |
| Caruthers Raisin Packing Co | CA1000468 | NTNCWS | Caruthers | 150 | Fresno County |
| Carver Tract Mutual Water Comp | CA3301107 | CWS | Indio | 600 | Riverside County |
| Casa De Amigos Manufactured Housing Comm | CA5000060 | CWS | Stockton | 204 | Stanislaus County |
| Casa De Fruta Orchards | CA3500511 | CWS | Hollister | 53 | San Benito County |
| Casa De Fruta Water System | CA4300611 | CWS | Hollister | 250 | Santa Clara County |
| Casa Dulce Estates | CA1900717 | CWS | Agua Dulce | 26 | Los Angeles County |
| Casa Medanos Water System | CA0707594 | CWS | Walnut Creek | 45 | Contra Costa County |
| Cascade Estates | CA5500104 | CWS | Larkspur | 316 | Tuolumne County |
| Cascadel Mutual Water System | CA2000509 | CWS | North Fork | 50 | Madera County |
| Casitas Mutual Water Company | CA5601104 | CWS | Casitas Springs | 238 | Ventura County |
| Casmalia Community Services District | CA4200870 | CWS | Casmalia | 150 | Santa Barbara County |
| Caspar South Service Company | CA2300610 | CWS | Santa Rosa | 188 | Mendocino County |
| Cassel Park Mutual Water Co | CA4500173 | CWS | Cassel | 131 | Shasta County |
| Cassin Ranch (Driscoll'S) | CA4400904 | NTNCWS | Watsonville | 30 | Santa Cruz County |
| Castello Di Amorosa | CA2800043 | NTNCWS | St Helena | 98 | Napa County |
| Casterlin School | CA1200546 | NTNCWS | Miranda | 50 | Humboldt County |
| Castle Airport | CA2410700 | CWS | Merced | 150 | Merced County |
| Castle Mountain Mine | CA3601082 | NTNCWS | Henderson | 50 | San Bernardino County |
| Castlewood Domestic Water System | CA0105008 | CWS | Pleasanton | 524 | Alameda County, Santa Clara County |
| Castlewood Mobile Home Park | CA5800832 | CWS | Marysville | 200 | Yuba County |
| Castro Ranch | 090600027 | CWS | Thermal | 44 | |
| Cathedral Hills Mwc, Inc | CA4400652 | CWS | Aptos | 75 | Santa Cruz County |
| Cathedral Wood Mutual Water Company | CA4400642 | CWS | Scotts Valley | 60 | Santa Cruz County |
| Caymus Cordelia Winery | CA4810038 | NTNCWS | Rutherford | 75 | Solano County |
| Caymus Vineyards | CA2801076 | NTNCWS | Fairfield | 42 | Napa County |
| Cayucos Beach Mutual Water Company | CA4010006 | CWS | Cayucos | 2,567 | San Luis Obispo County |
| Cazadero Water Company, Inc. (Puc) | CA4900508 | CWS | Forestville | 525 | Sonoma County |
| Cbuso Dba Woodbridge Winery | CA3901282 | NTNCWS | Acampo | 150 | San Joaquin County |
| Cbuso Mission Bell | CA2000659 | NTNCWS | Madera | 450 | Madera County |
| Cc Farms, Llc. | CA1009232 | CWS | Livermore | 82 | Fresno County |
| Ccwd - Sheep Ranch | CA0510004 | CWS | San Andreas | 89 | Calaveras County |
| Ccwd - Wallace | CA0510019 | CWS | San Andreas | 255 | Calaveras County |
| Ccwd - West Point | CA0510005 | CWS | San Andreas | 1,043 | Calaveras County |
| Ccwd/Brentwood Wtp | CA0710011 | CWS | Concord | 0 | Contra Costa County |
| Cdcr - Sierra Conservation Center | CA5510851 | CWS | Jamestown | 3,571 | Tuolumne County |
| Cdcr California Health Care Facility | CA3910803 | CWS | Stockton | 2,186 | San Joaquin County |
| Cdf - Oak Glen Conservation Camp | CA3610800 | CWS | Yucaipa | 59 | Riverside County, San Bernardino County |
| Cdf - Owens Valley Conservation Camp | CA1410800 | CWS | Bishop | 110 | Inyo County |
| Cdf - Pilot Rock Conservation Camp | CA3610801 | CWS | Crestline | 65 | San Bernardino County |
| Cdf-Chamberlain Creek Conservation Camp | CA2310801 | NTNCWS | Fort Bragg | 110 | Mendocino County |
| Cdf-Konocti Conservation Camp No. 27 | CA1710800 | CWS | Lower Lake | 100 | Lake County |
| Cdf-Parlin Fork Conservation Camp | CA2310800 | NTNCWS | Fort Bragg | 55 | Mendocino County |
| Cebro Frozen Foods (Eh) | CA5000590 | NTNCWS | Newman | 70 | Stanislaus County |
| Cedar Creek Mobilehome Park | CA4500063 | CWS | Zamora | 40 | Shasta County |
| Cedar Lodge | CA2210900 | CWS | Watsonville | 28 | Mariposa County |
| Cedar Valley Mutual Water Co | CA2000538 | CWS | Oakhurst | 137 | Madera County |
| Cedarpines Park Mwc | CA3610011 | CWS | Cedarpines Park | 2,458 | San Bernardino County |
| Cedarville County Water Dist. | CA2510002 | CWS | Cedarville | 600 | Modoc County |
| Cemex Calif Cement Llc Av | CA3601130 | NTNCWS | Victorville | 100 | San Bernardino County |
| Cemex Calif Cement Llc Vv | CA3601062 | NTNCWS | Victorville | 100 | San Bernardino County |
| Center Water Co | CA3600070 | CWS | Lucerne Valley | 162 | San Bernardino County |
| Centerville School | CA1000104 | NTNCWS | Sanger | 456 | Fresno County |
| Central Bay High School Ws | CA2702490 | NTNCWS | Salinas | 70 | Monterey County |
| Central Ca Womens Facility | CA2010800 | CWS | Chowchilla | 2,046 | Madera County |
| Central Coast Water Authority | CA4210030 | CWS | Buellton | 0 | Santa Barbara County |
| Central High School West | CA1000217 | NTNCWS | Fresno | 758 | Fresno County |
| Central Valley Eggs, Llc | CA1504006 | NTNCWS | Wasco | 210 | Kern County |
| Central Valley Meat Co Inc | CA1600050 | NTNCWS | Hanford | 812 | Kings County |
| Central Water District | CA4410018 | CWS | Aptos | 2,726 | Santa Cruz County |
| Century Mobile Home Park | CA3900579 | CWS | Riverbank | 50 | San Joaquin County |
| Ceres Unified/Westport School | CA5000109 | NTNCWS | Ceres | 450 | Stanislaus County |
| Certainteed Llc | CA2000681 | NTNCWS | Chowchilla | 205 | Madera County |
| Chalfant Valley West M.W.C. | CA2600699 | CWS | Bishop | 45 | Mono County |
| Chalk Hill Estates Hoa | CA4200885 | CWS | Solvang | 38 | Santa Barbara County |
| Chalk Hill Winery | CA4901390 | NTNCWS | Healdsburg | 25 | Sonoma County |
| Chamisal Mwc | CA3600071 | CWS | Adelanto | 84 | San Bernardino County |
| Chamisal Wa | CA2701659 | NTNCWS | Salinas | 396 | Monterey County |
| Chanac Creek Mutual Water Company | CA1502670 | CWS | Tehachapi | 240 | Kern County |
| Charity Way Water System | CA5000535 | NTNCWS | Modesto | 25 | Stanislaus County |
| Charles Brown Water Company | CA1400004 | CWS | Shoshone | 242 | Inyo County |
| Charleston School | CA2400091 | NTNCWS | Los Banos | 325 | Merced County |
| Chateau Montelena Winery | CA2801004 | NTNCWS | Calistoga | 26 | Napa County |
| Chatom School (Eh) | CA5000101 | NTNCWS | Turlock | 385 | Stanislaus County |
| Chemehuevi Water | 090600125 | CWS | Havasu Lake | 2,200 | San Bernardino County |
| Chemeketa Park Mutual Water Company | CA4300517 | CWS | Santa Clara | 346 | Santa Clara County |
| Chemurgic Agricultural Chemicals, Inc. | CA5000482 | NTNCWS | Turlock | 42 | Stanislaus County |
| Cherry Lane Trailer Park | CA3900983 | CWS | Stockton | 100 | San Joaquin County |
| Cherry Valley Water Company | CA3301114 | CWS | Cherry Valley | 210 | Riverside County |
| Chester Public U.D. | CA3210009 | CWS | Chester | 2,187 | Plumas County |
| Chetmoore Acres Wa | CA2700634 | CWS | Royal Oaks | 59 | Monterey County |
| Chevron San Joaquin | CA1502561 | NTNCWS | Bakersfield | 300 | Kern County |
| Childkind Laguna Preschool | CA4901382 | NTNCWS | Santa Rosa | 42 | Sonoma County |
| China Lake Acres Mutual Water Company | CA1500563 | CWS | Inyokern | 198 | Kern County |
| China Lake Naval Air - South Range | CA1503678 | NTNCWS | China Lake | 150 | Kern County, San Bernardino County |
| Chinese Camp School | CA5500148 | NTNCWS | Jamestown | 34 | Tuolumne County |
| Chino Basin Desalter Auth. - Desalter 1 | CA3610075 | CWS | Ontario | 0 | San Bernardino County |
| Chino Basin Desalter Auth. - Desalter 2 | CA3310083 | CWS | Ontario | 0 | Riverside County |
| Chiri Sweet Water Company | CA4300757 | CWS | San Martin | 40 | Santa Clara County |
| Chiriaco Summit Water Dist. | CA3301115 | CWS | Chiriaco Summit | 544 | Riverside County |
| Choctaw Valley Mutual Water Co. | CA1500599 | CWS | Bakersfield | 44 | Kern County |
| Chooljian Bros Packing Co | CA1000534 | NTNCWS | Sanger | 30 | Fresno County |
| Chorro Valley Pipeline - Slo County | CA4010030 | CWS | San Luis Obispo | 0 | San Luis Obispo County |
| Christian Encounter Ministries | CA2900541 | CWS | Grass Valley | 35 | Nevada County |
| Christian Valley Park Csd | CA3110034 | CWS | Jackson | 1,800 | Placer County |
| Christopher Ranch L.L.C. | CA4300957 | NTNCWS | Gilroy | 735 | Santa Clara County |
| Church Of Glad Tidings | CA5102009 | NTNCWS | Yuba City | 28 | Sutter County |
| Church Of The Good Shepherd Ws | CA2702050 | NTNCWS | Salinas | 50 | Monterey County |
| Cinnabar Elementary School | CA4900716 | NTNCWS | Petaluma | 228 | Sonoma County |
| Cinnabar Hills Golf Club | CA4300986 | NTNCWS | San Jose | 50 | Santa Clara County |
| Circle K Ranch | CA1000677 | NTNCWS | Selma | 25 | Fresno County |
| Circle Oaks Water District | CA2800521 | CWS | Napa | 500 | Napa County |
| City Of 10,000 Buddhas | CA2300731 | CWS | Talmage | 200 | Mendocino County |
| City Of Biggs | CA0410001 | CWS | Biggs | 2,060 | Butte County |
| City Of Brisbane | CA4110002 | CWS | Brisbane | 3,434 | San Mateo County |
| City Of Loyalton | CA4610001 | CWS | Loyalton | 983 | Sierra County |
| City Of Merced Wwtp | CA2400348 | NTNCWS | Merced | 30 | Merced County |
| City Of Modesto - Central Turlock | CA5010035 | CWS | Modesto | 119 | Stanislaus County |
| City Of Modesto - Del Rio | CA5010029 | CWS | Modesto | 1,346 | Stanislaus County |
| City Of Modesto - Grayson | CA5010033 | CWS | Modesto | 917 | Stanislaus County |
| City Of Modesto - North Turlock | CA5010034 | CWS | Modesto | 172 | Stanislaus County |
| City Of Modesto - South Turlock | CA5010023 | CWS | Modesto | 1,109 | Stanislaus County |
| City Of Modesto - Walnut Manor | CA5010031 | CWS | Modesto | 178 | Stanislaus County |
| City Of Nevada City | CA2910002 | CWS | Nevada City | 3,148 | Nevada County |
| City Of Orland, Haigh Field Park | CA1105003 | NTNCWS | Orland | 30 | Glenn County |
| City Of Portola | CA3210003 | CWS | Portola | 2,100 | Plumas County |
| City Of Tehama | CA5200504 | CWS | Tehama | 436 | Tehama County |
| Clark Pacific - Cr 18C | CA5700761 | NTNCWS | Woodland | 450 | Yolo County |
| Clark Street Community Well | CA1502056 | CWS | Lake Isabella | 90 | Kern County |
| Clarksburg Comm Church | CA5700804 | NTNCWS | Clarksburg | 160 | Yolo County |
| Clarksburg Middle School | CA5700509 | NTNCWS | Rio Vista | 460 | Yolo County |
| Classic Yam Water System | CA2400255 | NTNCWS | Livingston | 75 | Merced County |
| Clausen Meat Company | CA2400347 | NTNCWS | Turlock | 60 | Merced County |
| Clawa | CA3610114 | CWS | Crestline | 2,320 | San Bernardino County |
| Clay Joint Elementary School | CA1000315 | NTNCWS | Kingsburg | 271 | Fresno County |
| Clayton Palms Water | CA0707603 | CWS | Clayton | 549 | Contra Costa County |
| Clean Harbors Buttonwillow, Llc. | CA1502763 | NTNCWS | Buttonwillow | 26 | Kern County |
| Clear Creek Csd-Westwood | CA1800512 | CWS | Westwood | 400 | Lassen County |
| Clear Creek Market | CA4500208 | NTNCWS | Redding | 32 | Shasta County |
| Clear Creek Mobile Park | CA4500066 | CWS | Redding | 75 | Shasta County |
| Clear Creek School | CA2900536 | NTNCWS | Grass Valley | 160 | Nevada County |
| Clear Creek Water Company | CA4900736 | CWS | Cloverdale | 40 | Sonoma County |
| Clear Ridge Wa | CA2701898 | CWS | Big Sur | 115 | Monterey County |
| Clear Skies Mobile Home Park | CA1900817 | CWS | Rancho Cucamonga | 131 | Los Angeles County |
| Clear Water Mutual Water Company | CA1700546 | CWS | Kelseyville | 154 | Lake County |
| Clearlake Oaks County Water District | CA1710001 | CWS | Clearlake Oak | 2,359 | Lake County |
| Clements Water Works #43 | CA3900504 | CWS | Stockton | 264 | San Joaquin County |
| Cline Cellars | CA4901278 | NTNCWS | Sonoma | 500 | Sonoma County |
| Clio Public Utility District | CA3200509 | CWS | Clio | 79 | Plumas County |
| Clos Du Val Wine Co. | CA2801006 | NTNCWS | Napa | 100 | Napa County |
| Clover Flat Elementary School | CA3702364 | NTNCWS | Pine Valley | 160 | San Diego County |
| Cloverdale Mutual Water Co. | CA5610068 | CWS | Oxnard | 455 | Ventura County |
| Coarsegold Market | CA2000558 | NTNCWS | Coarsegold | 115 | Madera County |
| Coarsegold School | CA2000611 | NTNCWS | Mariposa | 389 | Madera County |
| Coast Springs - Cal. Water Service (Puc) | CA2110007 | CWS | San Jose | 445 | Marin County |
| Coastal Christian School | CA4000844 | NTNCWS | Pismo Beach | 650 | San Luis Obispo County |
| Coastlands Mws (Post Creek) | CA2701279 | CWS | Big Sur | 129 | Monterey County |
| Cobb Area County Water District | CA1710012 | CWS | Cobb | 3,515 | Lake County |
| Cobles Corner | CA5000033 | CWS | Hughson | 50 | Stanislaus County |
| Coe Orchard Equipment | CA5105011 | NTNCWS | Live Oak | 90 | Sutter County |
| Cold Creek Mutual Water Company | CA4700885 | CWS | Mt. Shasta | 63 | Siskiyou County |
| Cold Spring Granite Co Raymond | CA2000619 | NTNCWS | Raymond | 43 | Madera County |
| Cold Springs Main | 090600126 | CWS | Tollhouse | 209 | Fresno County |
| Cold Springs Subdivision | 090605077 | CWS | Tollhouse | 35 | |
| Cold Springs Water Co | CA5510011 | CWS | Cold Springs | 1,771 | Tuolumne County |
| Cold Water Canyon Mwc | CA2600733 | CWS | Bishop | 65 | Mono County |
| Coleman National Fish Hatchery | CA4500036 | NTNCWS | Anderson | 46 | Shasta County |
| Coleville High School | CA2600570 | NTNCWS | Bridgeport | 216 | Mono County |
| College Park Mutual Water Company | CA4900667 | CWS | Penngrove | 244 | Sonoma County |
| Collinsville Water Works | CA4800511 | CWS | Birds Landing | 25 | Solano County |
| Colonia Santa Maria | CA0707517 | CWS | Brentwood | 32 | Contra Costa County |
| Colonial Oak Wc Inc | CA2700534 | CWS | Salinas | 198 | Monterey County |
| Colonial Park | CA4900721 | CWS | Healdsburg | 342 | Sonoma County |
| Colorado Mutual Water Company | CA1900801 | CWS | Lancaster | 37 | Los Angeles County |
| Columbia Mobile Home Park | CA5500149 | CWS | Newport Beach | 89 | Tuolumne County |
| Columbine School | CA5400886 | NTNCWS | Delano | 226 | Tulare County |
| Columbine Vineyards Plant 1 Water System | CA1503681 | NTNCWS | Delano | 55 | Kern County |
| Colusa Co. Service Area #1-Century Ranch | CA0600012 | CWS | Colusa | 450 | Colusa County |
| Colusa Co. Service Area #2-Stonyford | CA0600005 | CWS | Colusa | 160 | Colusa County |
| Colusa Co. Wwd #1 - Grimes | CA0600008 | CWS | Grimes | 512 | Colusa County |
| Colusa Co. Wwd #2 - Princeton | CA0600013 | CWS | Princeton | 382 | Colusa County |
| Colusa Industrial Properties | CA0600065 | NTNCWS | Colusa | 533 | Colusa County |
| Colusa Northern System | 090605046 | CWS | Colusa | 67 | |
| Community Mutual Water Co | CA5601125 | CWS | Camarillo | 65 | Ventura County |
| Comstock Mutual Water Company | CA3500912 | CWS | Hollister | 100 | San Benito County |
| Comunidad Nuevo Lago, Inc | CA1000244 | CWS | Turlock | 160 | Fresno County |
| Copco Lake Mwc | CA4700551 | CWS | Prescott | 181 | Siskiyou County |
| Corda Rd Ws | CA2701820 | CWS | Salinas | 54 | Monterey County |
| Corinthian Bay Mutual Water Company | CA1700549 | CWS | Lakeport | 75 | Lake County |
| Corning Rv Park | CA5200255 | CWS | Corning | 112 | Tehama County |
| Corral De Tierra Country Club Ws | CA2702315 | NTNCWS | Salinas | 225 | Monterey County |
| Corral Hollow Pws | CA3900702 | CWS | Stockton | 145 | San Joaquin County |
| Cortland Pines Mutual Water Co | CA4500009 | CWS | Shingletown | 92 | Shasta County |
| Costanoa Campground | CA4100603 | NTNCWS | Pescadero | 33 | San Mateo County |
| Cosumnes River Elementary School | CA3400253 | NTNCWS | Sacramento | 423 | Sacramento County |
| Cottonwood Ridge Manufactured Housing Co | CA4500107 | CWS | San Diego | 205 | Shasta County |
| Cottonwood School | CA3301308 | NTNCWS | Hemet | 202 | Riverside County |
| Country Club County Wd | CA2400128 | CWS | Turlock | 64 | Merced County |
| Country Club Vista Mutual Water Co | CA3900733 | CWS | Woodbridge | 75 | San Joaquin County |
| Country Hills Estates | CA4000637 | CWS | Arroyo Grande | 60 | San Luis Obispo County |
| Country Leisure Mobile Estates | CA1100413 | CWS | Oakdale | 40 | Glenn County |
| Country Life Mh & Rv Park | CA1300550 | CWS | El Centro | 600 | Imperial County |
| Country Manor Mhp | CA3900844 | CWS | Valley Springs | 75 | San Joaquin County |
| Country Squire Mobile Estates & Water Sy | CA3900607 | CWS | Oakdale | 131 | San Joaquin County |
| Country Villa Apts | CA5000218 | CWS | Brentwood | 60 | Stanislaus County |
| Country Village Mobile Home Park | CA5800824 | CWS | Oakdale | 50 | Yuba County |
| Country Western Mhrv | CA5000080 | CWS | Modesto | 55 | Stanislaus County |
| Countryside Care Center | CA1000430 | CWS | Fresno | 56 | Fresno County |
| Countryside Estates Mwc | CA2702374 | CWS | Salinas | 73 | Monterey County |
| Countryside Mobile Home Park | CA5800828 | CWS | Marysville | 185 | Yuba County |
| County Of Monterey-Lake Nacimiento | CA4000590 | NTNCWS | Bradley | 20 | San Luis Obispo County |
| County Service Area 11 | CA4100582 | CWS | Redwood City | 450 | San Mateo County |
| County Service Area 7 | CA4100509 | CWS | Redwood City | 300 | San Mateo County |
| Courage To Change | CA5403148 | NTNCWS | Exeter | 37 | Tulare County |
| Cove Mobile Villa | CA4700626 | CWS | Sacramento | 105 | Siskiyou County |
| Covelo Mobile Home Park | CA2300892 | CWS | Ukiah | 30 | Mendocino County |
| Covina Valley Water Company - Wholesale | CA1910128 | CWS | West Covina | 0 | Los Angeles County |
| Covington Mill - A | CA5301103 | CWS | Redding | 25 | Trinity County |
| Covington Mill Mwc-Division B | CA5301104 | CWS | Tujunga | 40 | Trinity County |
| Coyote Creek Golf Club | CA4300596 | NTNCWS | Morgan Hill | 101 | Santa Clara County |
| Coyote Valley Mutual Water Co | CA1300514 | CWS | Ocotillo | 125 | Imperial County |
| Coyote Valley Rv Resort | CA4300994 | CWS | Los Gatos | 500 | Santa Clara County |
| Coyote Valley System | 090600030 | CWS | Redwood Valley | 850 | Mendocino County |
| Cozad Water System | CA3901323 | NTNCWS | Stockton | 85 | San Joaquin County |
| Crain Walnut Shelling, Inc. | CA5200015 | NTNCWS | Los Molinos | 167 | Tehama County |
| Crass Mutual Water Company | CA2000530 | CWS | Oakhurst | 80 | Madera County |
| Creekbridge Mutual Water Company | CA3500911 | CWS | Hollister | 69 | San Benito County |
| Creekside Cabins & Rv Resort | CA2300717 | CWS | Henderson | 124 | Mendocino County |
| Creekside Mobilehome Park | CA4500219 | CWS | Sacramento | 70 | Shasta County |
| Creekside Village | CA2900531 | CWS | Penn Valley | 300 | Nevada County |
| Cressey School | CA2400097 | NTNCWS | Ballico | 155 | Merced County |
| Cresta Mesa Parque | CA4800589 | CWS | Fairfield | 25 | Solano County |
| Creston Elementary School | CA4000693 | NTNCWS | Atascadero | 100 | San Luis Obispo County |
| Crestview Mutual Water Co | CA5610058 | CWS | Camarillo | 2,079 | Ventura County |
| Crestwood Heights Water Assn | CA4400605 | CWS | Watsonville | 126 | Santa Cruz County |
| Crew Wine Company | CA5700730 | NTNCWS | Zamora | 30 | Yolo County |
| Crowley Lake Mutual Water Company | CA2600546 | CWS | Crowley Lake | 175 | Mono County |
| Crowley Lake Trailer Park | CA2600547 | CWS | Crowley Lake | 230 | Mono County |
| Crows Landing Comm Svc District | CA5000005 | CWS | Crows Landing | 500 | Stanislaus County |
| Crystal Caves Mhp | CA0900422 | CWS | Placerville | 112 | El Dorado County |
| Crystal Geyser Bottling Plant | CA1400528 | NTNCWS | Olancha | 110 | Inyo County |
| Crystal Lake Property Owners | CA3601010 | CWS | Yermo | 163 | San Bernardino County |
| Crystals | CA4901595 | CWS | Santa Rosa | 48 | Sonoma County |
| Csa 42 Oro Grande | CA3600220 | CWS | San Bernardino | 533 | San Bernardino County |
| Csa 51 | CA3301381 | CWS | Desert Center | 400 | Riverside County |
| Csa 62 | CA3301577 | CWS | Ripley | 614 | Riverside County |
| Csa 70 W-4 Pioneertown | CA3600196 | CWS | San Bernardino | 474 | San Bernardino County |
| Csa 70-F Morongo | CA3600226 | CWS | San Bernardino | 300 | San Bernardino County |
| Csa No. 31 Stonegate Ws | CA3500006 | CWS | Hollister | 230 | San Benito County |
| Csp Labs & Micro Paradox | CA5105013 | NTNCWS | Pleasant Grove | 95 | Sutter County |
| Csp-Pfeiffer Big Sur | CA2710300 | CWS | Big Sur | 85 | Monterey County |
| Cuddeback Grammar School | CA1200681 | NTNCWS | Carlotta | 165 | Humboldt County |
| Cuesta La Honda Guild Inc | CA4110012 | CWS | La Honda | 863 | San Mateo County |
| Currier Estates Water Corp | CA3900701 | CWS | Tracy | 148 | San Joaquin County |
| Cusd District Office | CA0500097 | NTNCWS | San Andreas | 100 | Calaveras County |
| Cuyama Community Services District | CA4210009 | CWS | New Cuyama | 700 | Santa Barbara County |
| Cuyama Elementary School | CA4200879 | NTNCWS | Cuyama | 250 | Santa Barbara County |
| Cuyama Lane Water Company | CA4000598 | NTNCWS | Santa Maria | 25 | San Luis Obispo County |
| Cuyamaca Outdoor School | CA3701909 | NTNCWS | Descanso | 20 | San Diego County |
| Cuyamaca Water District | CA3700074 | CWS | Julian | 160 | San Diego County |
| Cvusd Facilities/M&O | CA3301147 | NTNCWS | Thermal | 50 | Riverside County |
| Cws - Fremont Valley | CA1500333 | CWS | San Jose | 180 | Kern County |
| Cws - Kernville | CA1510033 | CWS | San Jose | 2,376 | Kern County |
| Cws - Lakeland | CA1510049 | CWS | San Jose | 263 | Kern County |
| Cws - Lower Bodfish Water System | CA1510056 | CWS | San Jose | 689 | Kern County |
| Cws - Mullen Water Company | CA5400935 | CWS | San Jose | 138 | Tulare County |
| Cws - Tulco Water Company | CA5410041 | CWS | San Jose | 716 | Tulare County |
| Cws - Upper Bodfish Water System | CA1510026 | CWS | San Jose | 244 | Kern County |
| Cws Southlake System | CA1510039 | CWS | San Jose | 1,015 | Kern County |
| Cws-Grand Oaks Water System | CA1500374 | CWS | San Jose | 173 | Kern County |
| Cws-Onyx Water System | CA1510043 | CWS | San Jose | 246 | Kern County |
| Cws-Split Mountain Water System | CA1500407 | CWS | San Jose | 203 | Kern County |
| Cypress Canyon Water System | CA1502449 | CWS | Lake Isabella | 32 | Kern County |
| Cypress Center Ws | CA2702643 | NTNCWS | Salinas | 40 | Monterey County |
| Cypress Mutual Water Co Inc | CA5602103 | CWS | Oxnard | 224 | Ventura County |
| D'Arrigo Harris Rd Ws #10 | CA2702704 | NTNCWS | Salinas | 284 | Monterey County |
| Daggett Comm Svcs Dist | CA3600086 | CWS | Daggett | 795 | San Bernardino County |
| Dairyland School | CA2000597 | NTNCWS | Chowchilla | 252 | Madera County |
| Daou Vineyards, Llc | CA4000825 | NTNCWS | Paso Robles | 26 | San Luis Obispo County |
| Darioush Winery | CA2800041 | NTNCWS | Napa | 40 | Napa County |
| Darling Ingredients Turlock | CA5000599 | NTNCWS | Crows Landing | 43 | Stanislaus County |
| Darr Water Co | CA3601013 | NTNCWS | Boron | 43 | San Bernardino County |
| Darwin Community Service District | CA1400098 | CWS | Darwin | 25 | Inyo County |
| Dash Dream Plant | CA2400332 | NTNCWS | Dos Palos | 34 | Merced County |
| Date Gardens Mobile Home Park | CA1300575 | CWS | Laguna Hills | 202 | Imperial County |
| Davenport County Sanitation | CA4400571 | CWS | Santa Cruz | 350 | Santa Cruz County |
| Davis Estates | CA2801057 | NTNCWS | Huntington Beach | 84 | Napa County |
| Davis Jusd - Fairfield School | CA5700623 | NTNCWS | Davis | 46 | Yolo County |
| Davis Migrant Center (Ciudad Del Sol) | CA5700539 | NTNCWS | Woodland | 91 | Yolo County |
| Dd Mobile Home Park | 090605160 | CWS | Thermal | 275 | Imperial County |
| Deep Springs College | CA1400068 | NTNCWS | Big Pine | 40 | Inyo County |
| Deer Hill Mutual Water Co | CA4300842 | CWS | Morgan Hill | 36 | Santa Clara County |
| Deer Lodge Water System | CA3600087 | CWS | Lake Arrowhead Ca 92352 | 745 | San Bernardino County |
| Deer Meadow Mutual Water Company | CA5401026 | CWS | Three Rivers | 70 | Tulare County |
| Deetjen'S Big Sur Inn Ws | CA2702323 | NTNCWS | Big Sur | 35 | Monterey County |
| Defense Distrib. Depot - Tracy Site | CA3910702 | NTNCWS | Stockton | 1,249 | San Joaquin County |
| Defense Distrib. Depot, Sharpe Site | CA3910701 | NTNCWS | Monterey | 500 | San Joaquin County |
| Del Dios Mutual Water Company | CA3700866 | CWS | Escondido | 330 | San Diego County |
| Del Loma Rv Park & Cg | CA5304113 | NTNCWS | Del Loma | 157 | Trinity County |
| Del Monte Farms Rd Ws #03 | CA2700541 | CWS | Castroville | 55 | Monterey County |
| Del Norte Mutual Water Co. | CA5602104 | CWS | Somis | 215 | Ventura County |
| Del Oro California Pines District | CA5410034 | CWS | Chico | 249 | Tulare County |
| Del Oro River Island Serv Terr #1 | CA5400665 | CWS | Chico | 1,277 | Tulare County |
| Del Oro River Island Serv Terr #2 | CA5402048 | CWS | Chico | 89 | Tulare County |
| Del Oro Traver District | CA5400553 | CWS | Chico | 657 | Tulare County |
| Del Oro Water Co - Metropolitan District | CA1000057 | CWS | Chico | 96 | Fresno County |
| Del Oro Water Co-Benbow | CA1200671 | CWS | Chico | 347 | Humboldt County |
| Del Oro Water Co-Ferndale | CA1210007 | CWS | Chico | 1,662 | Humboldt County |
| Del Oro Water Co. - Hat Creek District | CA4500022 | CWS | Chico | 211 | Shasta County |
| Del Oro Water Co.-Johnson Park | CA4510015 | CWS | Chico | 908 | Shasta County |
| Del Oro Water Co.-Lime Saddle Marina | CA0405001 | CWS | Chico | 954 | Butte County |
| Del Oro Water Co.-Magalia | CA0410009 | CWS | Chico | 363 | Butte County |
| Del Oro Water Co.-Paradise Pines | CA0410011 | CWS | Chico | 10,738 | Butte County |
| Del Oro Water Co.-Stirling Bluffs | CA0410018 | CWS | Chico | 512 | Butte County |
| Del Oro Water Company - Buzztail Dist. | CA0400091 | CWS | Chico | 99 | Butte County |
| Del Oro Water Company - Strawberry Div. | CA5510007 | CWS | Chico | 386 | Tuolumne County |
| Del Oro Wc - Arbuckle District | CA0605011 | CWS | Chico | 185 | Colusa County |
| Del Oro Wc - Black Butte District | CA1100404 | CWS | Chico | 277 | Glenn County |
| Del Oro Wc - Country Estates Dist | CA1500314 | CWS | Chico | 297 | Kern County |
| Del Oro Wc - Larkspur Meadows | CA5200574 | CWS | Chico | 109 | Tehama County |
| Del Rey Community Serv Dist | CA1010035 | CWS | Del Rey | 1,491 | Fresno County |
| Del Rio East Hoa Water System | CA5000099 | CWS | Stockton | 110 | Stanislaus County |
| Del Rio Mutual | CA1900130 | CWS | El Monte | 700 | Los Angeles County |
| Del Sur School/Westside Union District | CA1900750 | NTNCWS | Quartz Hill | 825 | Los Angeles County |
| Delano Growers Grape Products | CA1502066 | NTNCWS | Delano | 41 | Kern County |
| Delany Wc | CA2702110 | CWS | Royal Oaks | 60 | Monterey County |
| Delaware North Parks Services At Tenaya | CA2210003 | NTNCWS | Fishcamp | 800 | Mariposa County |
| Delft Colony Water | CA5403023 | CWS | Visalia | 412 | Tulare County |
| Delicato Vineyards | CA3900815 | NTNCWS | Manteca | 430 | San Joaquin County |
| Delores Lane Water System | CA4901346 | CWS | Santa Rosa | 54 | Sonoma County |
| Delphic Elementary School | CA4700591 | NTNCWS | Montague | 50 | Siskiyou County |
| Delta Conservation Camp | CA4810801 | CWS | Suisun City | 65 | Solano County |
| Delta High School | CA5700510 | NTNCWS | Rio Vista | 250 | Yolo County |
| Delta Mutual Water Company | CA0707573 | CWS | Oakley | 333 | Contra Costa County |
| Delta Shores Resort | CA3400394 | NTNCWS | Winters | 85 | Sacramento County |
| Delta Trading Water System | CA1503660 | NTNCWS | Bakersfield | 65 | Kern County |
| Dempsey Road Mutual Water Co | CA5610001 | CWS | Oxnard | 990 | Ventura County |
| Department Of Water And Power | CA3600283 | CWS | Big Bear Lake | 239 | San Bernardino County |
| Descanso Community Water District | CA3710009 | CWS | Sacramento | 870 | San Diego County |
| Desert Dawn Mwc | CA3600088 | CWS | Lucerne Valley | 150 | San Bernardino County |
| Desert Lake Comm Serv Dist | CA1510027 | CWS | Boron | 968 | Kern County |
| Desert Palms Mobile Home Park | CA1900693 | CWS | Rancho Cucamonga | 140 | Los Angeles County |
| Desert Rose Mhp | 090600039 | CWS | Coachella | 30 | |
| Desert Sage Youth Wellness Center | CA3310084 | NTNCWS | Hemet | 70 | Riverside County |
| Desert Springs Mwc | CA3600089 | CWS | Lucerne Valley | 325 | San Bernardino County |
| Desert View Trailer Park | CA3301209 | CWS | La Verne | 60 | Riverside County |
| Desmond Rd Ws #03 | CA2700547 | CWS | Salinas | 56 | Monterey County |
| Desotec Us Llc | CA5200529 | NTNCWS | Red Bluff | 33 | Tehama County |
| Devil Mountain Wholesale Nursery | CA3901343 | NTNCWS | San Ramon | 25 | San Joaquin County |
| Devore Wc | CA3610117 | CWS | Devore | 1,574 | San Bernardino County |
| Dhs Border Patrol Hwy 94 Checkpoint | CA3710053 | NTNCWS | San Diego | 83 | San Diego County |
| Dhs Border Patrol I-8 Checkpoint | CA3710052 | NTNCWS | San Diego | 50 | San Diego County |
| Dhs Boulevard Border Patrol | CA3710051 | NTNCWS | San Diego | 155 | San Diego County |
| Dhs Calexico | CA1310019 | NTNCWS | Imperial | 250 | Imperial County |
| Di Giorgio School Water System | CA1502068 | NTNCWS | Arvin | 268 | Kern County |
| Diamond A Mutual Water Company | CA4900562 | CWS | Sonoma | 640 | Sonoma County |
| Diamond Jack'S Rv Ranch | CA3700174 | NTNCWS | Jamul | 115 | San Diego County |
| Diamond Jim S Casino | CA1503360 | NTNCWS | Rosamond | 230 | Kern County |
| Diamond Valley School | CA0202501 | NTNCWS | Markleeville | 100 | Alpine County |
| Diede Trucking Water System | CA3901473 | NTNCWS | Woodbridge | 25 | San Joaquin County |
| Dillard Elementary School | CA3400254 | NTNCWS | Sacramento | 478 | Sacramento County |
| Dingerville Usa Park | CA0400051 | CWS | Yorba Linda | 114 | Butte County |
| Dixieland Elementary School | CA2000760 | NTNCWS | Madera | 316 | Madera County |
| Dixon Migrant Center | CA4800804 | NTNCWS | Woodland | 346 | Solano County |
| Dlj Properties, Llc | CA3902184 | NTNCWS | Reno | 40 | San Joaquin County |
| Doctor'S Park Owners Association | CA4700881 | NTNCWS | Mt. Shasta | 175 | Siskiyou County |
| Dodge Ridge Ski Resort | CA5500168 | NTNCWS | Pinecrest | 28 | Tuolumne County |
| Dogwood Blue Jay Cyn Imp | CA3600094 | CWS | Blue Jay | 232 | San Bernardino County |
| Dolan Rd Mwc | CA2700548 | CWS | Moss Landing | 120 | Monterey County |
| Dolan Rd Water System #2 | CA2702652 | NTNCWS | Rancho Cordova | 50 | Monterey County |
| Dole Atwater Plant | CA2400011 | NTNCWS | Atwater | 1,550 | Merced County |
| Dolphin Isle Marina | CA2300743 | CWS | Fort Bragg | 280 | Mendocino County |
| Domaine Carneros | CA2801011 | NTNCWS | Napa | 52 | Napa County |
| Domaine Chandon | CA2800736 | NTNCWS | Yountville | 200 | Napa County |
| Don Pedro Rec Ag:Flem.Meadows | CA5500048 | CWS | La Grange | 41 | Tuolumne County |
| Donner Summit Public Utility District | CA2910016 | CWS | Soda Springs | 98 | Nevada County |
| Donner Trail Elementary School | CA2901208 | NTNCWS | Kingvale | 60 | Nevada County |
| Doreva Produce | CA2400336 | NTNCWS | Livingston | 50 | Merced County |
| Dorris, City Of | CA4710001 | CWS | Dorris | 887 | Siskiyou County |
| Double L Mobile Estates | CA3900842 | CWS | Lockeford | 320 | San Joaquin County |
| Doubletree Ranch Water System | CA0707615 | CWS | Livermore | 66 | Contra Costa County |
| Down River An Itw Company | CA3901423 | NTNCWS | Stockton | 25 | San Joaquin County |
| Downieville Public U.D. | CA4610002 | CWS | Downieville | 290 | Sierra County |
| Downtown Graton Mutual Water System | CA4901246 | CWS | Graton | 44 | Sonoma County |
| Driscoll Strawberry Ws | CA2702487 | NTNCWS | Watsonville | 85 | Monterey County |
| Dry Creek Vineyard | CA4901119 | NTNCWS | Healdsburg | 36 | Sonoma County |
| Drytown County Water District | CA0300010 | CWS | Ione | 221 | Amador County |
| Duarte Nursery Inc Water System | CA5000465 | NTNCWS | Hughson | 75 | Stanislaus County |
| Duckhorn Vineyards | CA2800024 | NTNCWS | St Helena | 25 | Napa County |
| Ducor Csd | CA5400542 | CWS | Ducor | 616 | Tulare County |
| Dune 3 Mutual Water Company, Llc | CA1502690 | CWS | Morro Bay | 119 | Kern County |
| Dunham School | CA4900739 | NTNCWS | Petaluma | 175 | Sonoma County |
| Dunlap K-8 School | CA1000184 | NTNCWS | Reedley | 453 | Fresno County |
| Dunneville Estates Csa #50 | CA3500910 | CWS | Hollister | 95 | San Benito County |
| Dunrovin Mobile Home Village | CA0500068 | CWS | Concord | 99 | Calaveras County |
| Dunsmuir, City Of | CA4710002 | CWS | Dunsmuir | 1,707 | Siskiyou County |
| Durham Dayton Industrial Partners-Pro Pa | CA0400140 | NTNCWS | Durham | 102 | Butte County |
| Durham Ferry Community School | CA3901424 | NTNCWS | Stockton | 31 | San Joaquin County |
| Durham Irrigation District | CA0410003 | CWS | Durham | 1,581 | Butte County |
| Duro Water System | 090605168 | CWS | Valley Center | 35 | |
| Dutch Slough Water Works | CA0707519 | CWS | Oakley | 49 | Contra Costa County |
| Dutton Farmworker Housing | CA4901471 | NTNCWS | Graton | 38 | Sonoma County |
| Dwp - Fawnskin | CA3610022 | CWS | Big Bear Lake | 1,271 | San Bernardino County |
| Dwr - San Luis Division O&M | CA2410950 | NTNCWS | Gustine | 150 | Merced County |
| Dwr Delta Field Division - Banks Pp | CA0710800 | NTNCWS | Byron | 180 | Alameda County, Contra Costa County |
| Dwr-Sutter Maintenance Yard | CA5102032 | NTNCWS | Sutter | 38 | Sutter County |
| Dynatect Ro-Lab, Inc. | CA3901338 | NTNCWS | Tracy | 40 | San Joaquin County |
| E & J Gallo Winery | CA2400169 | NTNCWS | Livingston | 313 | Merced County |
| E & J Gallo Winery-Sonoma | CA4901252 | NTNCWS | Healdsburg | 124 | Sonoma County |
| E Headstart | CA5200541 | NTNCWS | Yuba City | 220 | Tehama County |
| E&J Gallo Winery | CA1000447 | NTNCWS | Fresno | 229 | Fresno County |
| E.M. Tharp, Inc. | CA5403007 | NTNCWS | Porterville | 50 | Tulare County |
| Eagle'S Nest Resort | CA5400602 | CWS | Porterville | 60 | Tulare County |
| Earthrise Nutritionals, Llc | CA1300676 | NTNCWS | Calipatria | 45 | Imperial County |
| East Acres Mutual Water Company | CA2000512 | CWS | Firebaugh | 250 | Madera County |
| East Inyokern Mutual Water | CA1500554 | CWS | Inyokern | 87 | Kern County |
| East Nicolaus Joint Union High School | CA5100136 | NTNCWS | Nicolaus | 330 | Sutter County |
| East Orange County Wd - Rz | CA3010068 | CWS | Orange | 3,464 | Orange County |
| East Orange County Wd - Wz | CA3010093 | CWS | Orange | 0 | Orange County |
| East Orosi Community Services District | CA5401003 | CWS | Visalia | 423 | Tulare County |
| East Three Rivers Mutual Water Corp | CA5400744 | CWS | Three Rivers | 40 | Tulare County |
| East Valley Farms Mutual Water Company | CA4200800 | CWS | Santa Maria | 142 | Santa Barbara County |
| East Walnut Grove [Sws] | CA3400106 | CWS | Sacramento | 300 | Sacramento County |
| East Wilson Road Water Company | CA1502699 | CWS | Bakersfield | 46 | Kern County |
| Easterly Wwtp - Vacaville | CA4810040 | NTNCWS | Elmira | 70 | Solano County |
| Eastern Regional Sanitary Landfill Water | CA3105779 | NTNCWS | Auburn | 25 | Placer County |
| Eastern Sierra College Center - Bishop | CA1400526 | NTNCWS | Bishop | 290 | Inyo County |
| Eastern Sierra Regional Airport | CA1400055 | NTNCWS | Independence | 50 | Inyo County |
| Eastin | CA5000574 | NTNCWS | Newman | 26 | Stanislaus County |
| Easton Authority Jpa | CA1000221 | NTNCWS | Fresno | 1,000 | Fresno County |
| Easton Estates Water Company | CA1000018 | CWS | Fresno | 302 | Fresno County |
| Eastside Union School District | CA1900751 | NTNCWS | Lancaster | 650 | Los Angeles County |
| Eastside Water Association | CA3010008 | CWS | Midway City | 2,000 | Orange County |
| Eb Stone | CA4800820 | NTNCWS | Suisun City | 42 | Solano County |
| Ecco | CA2000688 | CWS | Oakhurst | 100 | Madera County |
| Echo Valley Rd Ws #05 | CA2701423 | CWS | Salinas | 45 | Monterey County |
| Echo Valley School Ws | CA2700552 | NTNCWS | Salinas | 579 | Monterey County |
| Eco Shell | CA5200802 | NTNCWS | Corning | 60 | Tehama County |
| Eddy Drive | CA4901671 | CWS | Santa Rosa | 48 | Sonoma County |
| Edgewater Mobile Home Park | CA3400433 | CWS | Granite Bay | 40 | Sacramento County |
| Edna Beaman Elementary School | CA2600568 | NTNCWS | Bridgeport | 26 | Mono County |
| Edna Valley Ranch East | CA4000202 | CWS | Arroyo Grande | 132 | San Luis Obispo County |
| Edna Valley Vineyards | CA4000819 | NTNCWS | San Luis Obispo | 30 | San Luis Obispo County |
| Edwards Afb - Air Force Research Lab | CA1510702 | NTNCWS | Edwards Afb | 446 | Kern County |
| Eel River Charter School | CA2300863 | NTNCWS | Covelo | 75 | Mendocino County |
| Eisenhower Medical Center(Water) | CA3301238 | NTNCWS | Ranhco Mirage | 2,300 | Riverside County |
| El Adobe Poa, Inc. | CA1500493 | CWS | Bakersfield | 200 | Kern County |
| El Camino Hospital | CA4300816 | NTNCWS | Mountain View | 2,000 | Santa Clara County |
| El Camino Machine & Welding Ws | CA2702452 | NTNCWS | Salinas | 25 | Monterey County |
| El Camino Wc Inc | CA2702409 | CWS | Salinas | 28 | Monterey County |
| El Capitan Mutual Water Company | CA4200703 | CWS | Goleta | 325 | Santa Barbara County |
| El Dorado Id - Outingdale | CA0910018 | CWS | Placerville | 478 | El Dorado County |
| El Dorado Id - Strawberry | CA0910017 | CWS | Placerville | 357 | El Dorado County |
| El Dorado Mobile Home Park | CA3400121 | CWS | Laguna Hills | 318 | Sacramento County |
| El Dorado Mutual Water Co. | CA1900803 | CWS | Palmdale | 660 | Los Angeles County |
| El Dorado West Mhp | CA3400122 | CWS | Laguna Hills | 203 | Sacramento County |
| El Mesquite Mhp | 090600034 | CWS | Thermal | 48 | |
| El Mirage School | CA3601179 | NTNCWS | Adelanto | 50 | San Bernardino County |
| El Nido Elementary School | CA2400075 | NTNCWS | El Nido | 220 | Merced County |
| El Nido Mobile Home Park | CA2400053 | CWS | Sacramento | 137 | Merced County |
| El Portal Mobile Estates | CA4900799 | CWS | Santa Rosa | 344 | Sonoma County |
| El Rancho Mobile Home Park | CA1900636 | CWS | Rancho Cucamonga | 215 | Los Angeles County |
| El Rancho Tajiguas | CA4200924 | CWS | Goleta | 40 | Santa Barbara County |
| El Rio Estates | CA4500246 | CWS | Anderson | 434 | Shasta County |
| El Rio Mobile Home Park | CA3900569 | CWS | Stockton | 60 | San Joaquin County |
| El Tejon Middle School | CA1502074 | NTNCWS | Lebec | 722 | Kern County |
| Eleanor Roosevelt Comm Learning Ctr | CA5403130 | NTNCWS | Visalia | 295 | Tulare County |
| Eleven Oaks Mobile Home Community | CA3400191 | CWS | North Highlands | 262 | Sacramento County |
| Elk County Water District | CA2300514 | CWS | Elk | 207 | Mendocino County |
| Elk Creek Community S.D. | CA1100616 | CWS | Elk Creek | 184 | Glenn County |
| Elkhorn Estates Water System | CA3900724 | CWS | Stockton | 234 | San Joaquin County |
| Elkhorn Rd Ws #04 | CA2700579 | CWS | Watsonville | 60 | Monterey County |
| Elkhorn School Ws | CA2700577 | NTNCWS | Salinas | 694 | Monterey County |
| Elkins Ranch | CA5601134 | CWS | Fillmore | 150 | Ventura County |
| Elks Lodge #322 | CA4000671 | NTNCWS | San Luis Obispo | 40 | San Luis Obispo County |
| Elks Lodge 1282 | CA5000563 | NTNCWS | Modesto | 25 | Stanislaus County |
| Ellwood Mutual Water Company | CA4200693 | CWS | Santa Barbara | 186 | Santa Barbara County |
| Elm Court | CA1000277 | CWS | Fresno | 64 | Fresno County |
| Emerald City Mutual Water Co | CA4400667 | CWS | Aptos | 26 | Santa Cruz County |
| Emerald Valley Mutual Water Company | CA4301004 | CWS | Gilroy | 43 | Santa Clara County |
| Emerald Valley-Zabala Ws | CA2703132 | NTNCWS | Salinas | 40 | Monterey County |
| Emigrant Gap Mutual Water Co. | CA3103310 | CWS | Emigrant Gap | 125 | Placer County |
| Encinal Elementary School | CA5100172 | NTNCWS | Live Oak | 128 | Sutter County |
| Encinal Rd Ws #01 | CA2701241 | CWS | Salinas | 91 | Monterey County |
| Enclave At The Delta | CA3901304 | CWS | Stockton | 39 | San Joaquin County |
| End-O-Valley Mutual Water Company | CA4900547 | CWS | Santa Rosa | 129 | Sonoma County |
| Enos Lane Public Utility District | CA1500544 | CWS | Bakersfield | 270 | Kern County |
| Enviroplex, Inc | CA3901392 | NTNCWS | Livermore | 50 | San Joaquin County |
| Enza Zaden Research | CA3500927 | NTNCWS | San Juan Bautista | 65 | San Benito County |
| Erskine Creek Wc | CA1510009 | CWS | Shafter | 2,500 | Kern County |
| Esalen Institute Ws | CA2701295 | CWS | Big Sur | 246 | Monterey County |
| Escalon Premier Brands | CA3900797 | NTNCWS | Escalon | 300 | San Joaquin County |
| Escalon Usd- Collegeville Sch | CA3900748 | NTNCWS | Escalon | 100 | San Joaquin County |
| Esparto C.S.D. | CA5710007 | CWS | Esparto | 3,572 | Yolo County |
| Esperanza Rd Ws | CA2702615 | NTNCWS | Soledad | 160 | Monterey County |
| Estancia Winery Ws | CA2702613 | NTNCWS | Soledad | 70 | Monterey County |
| Esterina Properties | CA5602101 | CWS | Santa Barbara | 50 | Ventura County |
| Estero Mutual | CA2100519 | CWS | Dillon Beach | 206 | Marin County |
| Etaa Facilities Llc | CA2000206 | NTNCWS | Madera | 636 | Madera County |
| Etna, City Of | CA4710004 | CWS | Etna | 720 | Siskiyou County |
| Etude Wines | CA2801002 | NTNCWS | Napa | 25 | Napa County |
| Eusd-Gateway Charter | CA3901373 | NTNCWS | Escalon | 25 | San Joaquin County |
| Eusd-Van Allen School | CA3901167 | NTNCWS | Escalon | 200 | San Joaquin County |
| Evergreen Lodge | CA5500089 | NTNCWS | Tiburon | 30 | Tuolumne County |
| Evergreen Mobile Estates | CA4900728 | CWS | Stockton | 65 | Sonoma County |
| Evergreen Mobile Home Park | CA2400084 | CWS | Lincoln | 36 | Merced County |
| Evergreen Motel & Mhp | CA3200114 | CWS | Clayton | 28 | Plumas County |
| Evergreen Mutual Water Company | CA1900804 | CWS | Lancaster | 98 | Los Angeles County |
| Evergreen Union School District | CA5200513 | NTNCWS | Cottonwood | 1,200 | Tehama County |
| Excell Center | CA5000473 | NTNCWS | Turlock | 45 | Stanislaus County |
| Excelsior Middle School | CA0706029 | NTNCWS | Byron | 600 | Contra Costa County |
| Fairmead Landfill | CA2000384 | NTNCWS | Madera | 72 | Madera County |
| Fairoaks Pws #44 | CA3901348 | CWS | Stockton | 1,172 | San Joaquin County |
| Fairway Downs Mutual Water Co | CA5800572 | CWS | Plumas Lake | 100 | Yuba County |
| Fairway Estates Pws Csa-18 | CA3901075 | CWS | Stockton | 149 | San Joaquin County |
| Fairway Mutual Water Co | CA5403084 | CWS | Kingsburg | 150 | Tulare County |
| Faith And Family Farms Ws | CA2708852 | NTNCWS | Salinas | 48 | Monterey County |
| Fall River Valley Csd | CA4510008 | CWS | Fall River Mills | 1,535 | Shasta County |
| Falling Rock Rv Park | CA0400117 | CWS | Oroville | 25 | Butte County |
| Fallon Road Labor Housing | CA3500830 | CWS | King City | 84 | San Benito County |
| Fallsvale Service Company | CA3610021 | CWS | Forest Falls | 1,046 | San Bernardino County |
| Family Education Center | CA5403126 | NTNCWS | Orosi | 50 | Tulare County |
| Family Tree Farms | CA5403041 | NTNCWS | Reedley | 30 | Tulare County |
| Famoso Nut Company | CA1504000 | NTNCWS | Mcfarland | 80 | Kern County |
| Far Niente Winery | CA2800299 | NTNCWS | Oakville | 30 | Napa County |
| Farmington Water Company | CA3900505 | CWS | Farmington | 270 | San Joaquin County |
| Farrar Park Property Owners | CA0706005 | CWS | Bethel Island Rd | 140 | Contra Costa County |
| Fc Tracy Holdings, Llc | CA3902211 | NTNCWS | Tracy | 219 | San Joaquin County |
| Fcsa 05 - Wildwood Island | CA1000021 | CWS | Fresno | 417 | Fresno County |
| Fcsa 10 - Cumorah Knolls | CA1000039 | CWS | Fresno | 132 | Fresno County |
| Fcsa 10A - Mansionette Estates | CA1000554 | CWS | Fresno | 81 | Fresno County |
| Fcsa 14 - Belmont Manor | CA1000023 | CWS | Fresno | 115 | Fresno County |
| Fcsa 30 - El Porvenir | CA1000019 | CWS | Fresno | 241 | Fresno County |
| Fcsa 32 - Cantua Creek | CA1000359 | CWS | Fresno | 468 | Fresno County |
| Fcsa 34 - Millerton New Town | CA1000484 | CWS | Fresno | 1,109 | Fresno County |
| Fcsa 34B - Ventana Hills | CA1000574 | CWS | Fresno | 48 | Fresno County |
| Fcsa 39 - A And B | CA1000471 | CWS | Fresno | 395 | Fresno County |
| Fcsa 43 - Raisin City | CA1000551 | CWS | Fresno | 182 | Fresno County |
| Fcsa 44C - Riverview Estates | CA1000555 | CWS | Fresno | 34 | Fresno County |
| Fcsa 44D - Monte Verdi | CA1000550 | CWS | Fresno | 350 | Fresno County |
| Fcsa 47 - Quail Lake Estates | CA1010055 | CWS | Fresno | 2,010 | Fresno County |
| Fcsa 49 - Five Points | CA1000546 | CWS | Fresno | 440 | Fresno County |
| Fcwwd 18/Friant | CA1010051 | CWS | Friant | 909 | Fresno County |
| Fcwwd 37/Mile High | CA1000040 | CWS | Fresno | 118 | Fresno County |
| Fcwwd 38/Sky Harbour | CA1000041 | CWS | Fresno | 182 | Fresno County |
| Fcwwd 40 - Shaver Springs | CA1000042 | CWS | Fresno | 196 | Fresno County |
| Fcwwd 41/Shaver Lake | CA1010017 | CWS | Fresno | 2,859 | Fresno County |
| Fcwwd 42/Alluvial & Fancher | CA1000078 | CWS | Fresno | 291 | Fresno County |
| Feather River Community College | CA3200111 | NTNCWS | 570 Golden Eagle Ave | 600 | Plumas County |
| Feather River Manor | CA5800851 | CWS | Plumas Lake | 35 | Yuba County |
| Feather River Rv & Mhp | CA3200148 | CWS | Graeagle | 53 | Plumas County |
| Feather River School | CA0400067 | NTNCWS | Oroville | 34 | Butte County |
| Fedex Freight, Inc. Chi | CA0409188 | NTNCWS | Santa Clara | 37 | Butte County |
| Fedex Ground | CA0409194 | NTNCWS | Telluride | 175 | Butte County |
| Fellowship Of Friends | CA5800863 | CWS | Oregon House | 60 | Yuba County |
| Fenner Canyon Youth Conservation Camp | CA1910801 | CWS | Valyermo | 95 | Los Angeles County |
| Fern Grove Water Club | CA4400572 | CWS | Scotts Valley | 187 | Santa Cruz County |
| Fern Valley Wd | CA3310040 | CWS | Idyllwild | 900 | Riverside County |
| Fernwood Ws | CA2702325 | CWS | Big Sur | 33 | Monterey County |
| Ferrari-Carano Winery | CA4901202 | NTNCWS | Healdsburg | 75 | Sonoma County |
| Fetzer Vineyards | CA2300852 | NTNCWS | Hopland | 126 | Mendocino County |
| Fiddletown Community Service | CA0300019 | CWS | Fiddletown | 100 | Amador County |
| Fieldbrook Glendale C.S.D. | CA1210020 | CWS | Mckinleyville | 1,845 | Humboldt County |
| Fiero Lane Water Company, Inc. | CA4000722 | NTNCWS | San Luis Obispo | 324 | San Luis Obispo County |
| Fillmore Irrigation Co | CA5601105 | CWS | Fillmore | 353 | Ventura County |
| Fink Road Landfill Stanislaus | CA5000427 | NTNCWS | Crows Landing | 31 | Stanislaus County |
| Finnlees Trailer Park | CA3900705 | CWS | Woodland | 55 | San Joaquin County |
| Fircrest Mutual Water Company | CA4900559 | CWS | Sebastopol | 126 | Sonoma County |
| Fire Suppression Camp #19 | CA1900901 | CWS | Diamond Bar | 125 | Los Angeles County |
| Fireclay Tile | CA3510009 | NTNCWS | Aromas | 100 | San Benito County |
| Firefall Ranch Water System | CA5500357 | NTNCWS | Tiburon | 26 | Tuolumne County |
| Firestone Business Park Ws | CA2701214 | NTNCWS | Salinas | 154 | Monterey County |
| Firestone Vineyard | CA4200866 | NTNCWS | Solvang | 37 | Santa Barbara County |
| First Mace Meadow # 1 | CA0310011 | CWS | Pine Grove | 838 | Amador County |
| First Mace Meadows Unit No. 2 | CA0310018 | CWS | Pine Grove | 230 | Amador County |
| First Mutual Water System | CA1502569 | CWS | Rosamond | 35 | Kern County |
| Fisherman'S Bend Mhp | CA5000058 | CWS | Gustine | 120 | Stanislaus County |
| Fisherman'S Retreat | CA3301267 | CWS | Redlands | 352 | Riverside County |
| Five Points Ranch | CA1009020 | CWS | Five Points | 95 | Fresno County |
| Flag City Water System | CA3901248 | NTNCWS | Stockton | 135 | San Joaquin County |
| Flight Ridge | CA2300838 | NTNCWS | San Rafael | 206 | Mendocino County |
| Floricultura Pacific Ws | CA2701152 | NTNCWS | Salinas | 82 | Monterey County |
| Floriston Water System | CA2900502 | CWS | Floriston | 110 | Nevada County |
| Flournoy School | CA5200518 | NTNCWS | Flournoy | 35 | Tehama County |
| Flrish Farms Ws | CA2700147 | NTNCWS | Salinas | 97 | Monterey County |
| Flying J Travel Center | CA1907011 | NTNCWS | Knoxville | 2,565 | Los Angeles County |
| Flying J Travel Plaza | CA1502820 | NTNCWS | Knoxville | 100 | Kern County |
| Foley Family Wines Chateau St. Jean | CA4900957 | NTNCWS | Kenwood | 125 | Sonoma County |
| Folsom Lake Mutual Water Co | CA3107339 | CWS | Granite Bay | 333 | Placer County |
| Foothill Apartments | CA5400769 | CWS | Porterville | 41 | Tulare County |
| Foothill Elementary School | CA1000476 | NTNCWS | Tollhouse | 750 | Fresno County |
| Foothill Estates Mhp | CA3600386 | CWS | Alta Loma | 53 | San Bernardino County |
| Foothill Estates Ws | CA2702198 | CWS | Salinas | 183 | Monterey County |
| Foothill Municipal Water Dist. | CA1910032 | CWS | La Canada Flintridge | 0 | Los Angeles County |
| Foothill Mutual Water Company | CA4300630 | CWS | Morgan Hill | 32 | Santa Clara County |
| Foothill Wa | CA2702135 | CWS | Salinas | 46 | Monterey County |
| Foothills Manufactured Home Communuty | CA0400027 | CWS | Oroville | 180 | Butte County |
| Forest Home Christian Cc | CA3600106 | NTNCWS | Forest Falls | 100 | San Bernardino County |
| Forest Knolls Mutual Water Co | CA0400078 | CWS | Forest Ranch | 44 | Butte County |
| Forest Lakes Mwc | CA4410016 | CWS | Felton | 1,067 | Santa Cruz County |
| Forest Park Mwc | CA3600107 | CWS | Forest Falls | 406 | San Bernardino County |
| Forest Point Mhc | CA0300024 | CWS | Stockton | 62 | Amador County |
| Forest Ranch Charter School | CA0400079 | NTNCWS | Forest Ranch | 125 | Butte County |
| Forest Ranch Mobile Park | CA0400041 | CWS | Oakley | 24 | Butte County |
| Forest Ranch Mutual Water System | CA0400004 | CWS | Forest Ranch | 118 | Butte County |
| Forest Springs | CA4400608 | CWS | Boulder Creek | 385 | Santa Cruz County |
| Forest Village Llc | CA0400042 | CWS | Rescue | 28 | Butte County |
| Forestville Water District | CA4910019 | CWS | Forestville | 3,717 | Sonoma County |
| Fort Bidwell Reservation | 090600128 | CWS | Fort Bidwell | 88 | Modoc County |
| Fort Hunter Liggett | CA2710702 | CWS | Fort Hunter Liggett | 2,753 | Monterey County |
| Fort Independence | 090600129 | CWS | Independence | 120 | Inyo County |
| Fort Jones, Town Of | CA4710003 | CWS | Fort Jones | 673 | Siskiyou County |
| Fort Ross School District | CA4900679 | NTNCWS | Cazadero | 100 | Sonoma County |
| Foster Farms #5 | CA5000579 | CWS | Hickman | 26 | Stanislaus County |
| Foster Farms - Cedar Hatchery | CA1000566 | NTNCWS | Livingston | 55 | Fresno County |
| Foster Farms Chicken Livehaul (Sycamore | CA2400166 | NTNCWS | Livingston | 110 | Merced County |
| Foster Farms Delhi Feedmill Collier Road | CA2400165 | NTNCWS | Delhi | 240 | Merced County |
| Foster Farms Fertilizer Plant | CA2400218 | NTNCWS | Livingston | 25 | Merced County |
| Foster Farms Traver Feedmill | CA5403114 | NTNCWS | Livingston | 50 | Tulare County |
| Foster Farms-Ellenwood Hatchery | CA5000481 | NTNCWS | Livingston | 38 | Stanislaus County |
| Foster Road Mutual Water Company | CA4200556 | CWS | Santa Maria | 150 | Santa Barbara County |
| Fottw | CA2904011 | NTNCWS | Truckee | 44 | Nevada County |
| Four Star Fruit | CA5403204 | NTNCWS | Delano | 80 | Tulare County |
| Fourth Street Water System | CA1500449 | CWS | Lake Isabella | 12 | Kern County |
| Fowler Care Center | CA1000199 | CWS | Fowler | 46 | Fresno County |
| Fowler Packing Company | CA1000480 | NTNCWS | Fresno | 50 | Fresno County |
| Francis Coppola Winery | CA4900844 | NTNCWS | Geyserville | 222 | Sonoma County |
| Francis Property Management | CA0400158 | NTNCWS | Chico | 51 | Butte County |
| Frank C Alegre Trucking Inc Ws | CA3901390 | NTNCWS | Lodi | 125 | San Joaquin County |
| Frank Family Vineyards | CA2801015 | NTNCWS | Calistoga | 25 | Napa County |
| Franklin Elementary School | CA3400248 | NTNCWS | Sacramento | 81 | Sacramento County |
| Franzia Winery | CA3900798 | NTNCWS | Ripon | 250 | San Joaquin County |
| Frazier Mountain High School | CA1503140 | NTNCWS | Lebec | 516 | Kern County |
| Frazier Nut Farms, Inc. | CA5000530 | NTNCWS | Waterford | 64 | Stanislaus County |
| Frazier Park Pud | CA1510007 | CWS | Frazier Park | 2,592 | Kern County |
| Frccsd Hot Springs | CA3200155 | CWS | Twain | 25 | Plumas County |
| Frccsd Old Mill Ranch | CA3200078 | CWS | Twain | 32 | Plumas County |
| Freemark Abbey Winery | CA2800561 | NTNCWS | Santa Rosa | 55 | Napa County |
| Freeport Marina | CA3400125 | CWS | Sacramento | 45 | Sacramento County |
| Fremont One | CA3901474 | CWS | Stockton | 39 | San Joaquin County |
| French Camp Golf Course | CA3901377 | NTNCWS | French Camp | 25 | San Joaquin County |
| Fresh Innovations Llc | CA3901471 | NTNCWS | Stockton | 111 | San Joaquin County |
| Fresh Select, Llc | CA5403215 | NTNCWS | Dinuba | 125 | Tulare County |
| Fresno Clovis Rwrf Water System | CA1010057 | NTNCWS | Fresno | 180 | Fresno County |
| Fresno Valves & Castings | CA1000541 | NTNCWS | Selma | 250 | Fresno County |
| Friedman Brothers Hardware | CA4900812 | NTNCWS | Santa Rosa | 95 | Sonoma County |
| Friendly Acres Mhp | CA5200539 | CWS | Sacramento | 75 | Tehama County |
| Frito-Lay, Inc. Water System | CA1502615 | NTNCWS | Bakersfield | 793 | Kern County |
| Fritsch Industrial Park | CA4901324 | NTNCWS | Santa Rosa | 36 | Sonoma County |
| Frontier Trails Homeowners Assoc Inc. | CA1500398 | CWS | Kernville | 26 | Kern County |
| Full Belly Farm | CA5700748 | NTNCWS | Guinda | 65 | Yolo County |
| Fuller Acres Mutual Water Company | CA1500296 | CWS | Lamont | 545 | Kern County |
| Fulton Water Company | CA3110015 | CWS | Carnelian Bay | 2,593 | Placer County |
| G & J Properties | CA0409177 | NTNCWS | Chico | 80 | Butte County |
| Gabilan Wc | CA2700586 | CWS | Salinas | 535 | Monterey County |
| Gaf Materials Co | CA3901315 | NTNCWS | Parsippany | 45 | San Joaquin County |
| Galindo Housing Facility | CA3303003 | CWS | Indio | 50 | Riverside County |
| Gamez Mhp | 090600029 | CWS | Thermal | 48 | |
| Gar, Llc. | CA1000680 | NTNCWS | Reedley | 100 | |
| Garberville Sanitary District | CA1210008 | CWS | Garberville | 2,041 | Humboldt County |
| Garcia Mhp | 090600037 | CWS | Thermal | 25 | |
| Garden Acres Mutual Water Co | CA5602108 | CWS | Oxnard | 1,335 | Ventura County |
| Garden Court Ws #01 | CA2702571 | NTNCWS | Morgan Hill | 25 | Monterey County |
| Garden Farms C.W.D. | CA4000507 | CWS | Atascadero | 440 | San Luis Obispo County |
| Garlen Court Ws | CA2700686 | CWS | Salinas | 65 | Monterey County |
| Gasquet C.S.D. | CA0800555 | CWS | Gasquet | 657 | Del Norte County |
| Gateway | CA1300018 | CWS | El Centro | 1,215 | Imperial County |
| Gateway Mobile Home Park | CA5200547 | CWS | Clayton | 103 | Tehama County |
| Gavilan Joint Community College District | CA4300608 | NTNCWS | Gilroy | 5,400 | Santa Clara County |
| Gaviota Oil Heating Facility | CA4200725 | NTNCWS | Goleta | 25 | Santa Barbara County |
| Gayla Manor Pws | CA3900563 | CWS | Stockton | 178 | San Joaquin County |
| Gazelle School | CA4700582 | NTNCWS | Gazelle | 60 | Siskiyou County |
| Gcg Water System | CA1503330 | NTNCWS | Bakersfield | 60 | Kern County |
| Gemperle Egg Ranch | CA2400343 | NTNCWS | Turlock | 55 | Merced County |
| General Atomics Aeronautical - Gray Butt | CA1901000 | NTNCWS | Palmdale | 405 | Los Angeles County |
| Genesis Solar Llc | CA3301164 | NTNCWS | Blythe | 45 | Riverside County |
| George Chiala Farms Inc | CA4300988 | NTNCWS | Morgan Hill | 150 | Santa Clara County |
| George Chiala Farms, Inc.. | CA3500928 | NTNCWS | Morgan Hill | 350 | San Benito County |
| George Ranch Mutual Water Company | CA4900973 | CWS | Hercules | 148 | Sonoma County |
| Gerber Las Flores Csd | CA5210002 | CWS | Gerber | 1,200 | Tehama County |
| Gerber Union Elementary School District | CA5200519 | NTNCWS | Gerber | 625 | Tehama County |
| Geyserville Newtech Academy School | CA4900705 | NTNCWS | Geyserville | 200 | Sonoma County |
| Geyserville Winery | CA4901152 | NTNCWS | Geyserville | 100 | Sonoma County |
| Gico Management | CA3902189 | NTNCWS | Ripon | 60 | San Joaquin County |
| Gilbert Street Complex | CA3600215 | CWS | San Bernardino | 124 | San Bernardino County |
| Gill Creek Mutual Water Company | CA4900521 | CWS | Geyserville | 290 | Sonoma County |
| Gilroy Usd-Rucker School | CA4300605 | NTNCWS | Gilroy | 510 | Santa Clara County |
| Glass House Camarillo Cultivation, Llc | CA5602656 | NTNCWS | Camarillo | 450 | Ventura County |
| Glassfab Tempering Services Inc. | CA3901309 | NTNCWS | Tracy | 125 | San Joaquin County |
| Gleanings For The Hungry | CA5402047 | CWS | Sultana | 35 | Tulare County |
| Glen Eden Sun Club | CA3301283 | CWS | Corona | 560 | Riverside County |
| Glen Ivy Hot Springs | CA3301294 | CWS | Corona | 32 | Riverside County |
| Glen Martin Mwc | CA3610016 | CWS | Angelus Oaks | 450 | San Bernardino County |
| Glenhaven Mutual Water Company | CA1700508 | CWS | Glenhaven | 300 | Lake County |
| Glenn Ave Ws #01 | CA2700589 | CWS | Salinas | 73 | Monterey County |
| Glennville Mutual Water Company | CA1503536 | CWS | Glennville | 100 | Kern County |
| Glenwood Mobile Estates | CA1400030 | CWS | Los Angeles | 468 | Inyo County |
| Glenwood Mobile Home Park | CA3900649 | CWS | San Ramon | 100 | San Joaquin County |
| Gloria Ferrer Caves | CA4901028 | NTNCWS | Sebastopol | 70 | Sonoma County |
| Gold Beach Park | CA0900102 | CWS | Stockton | 134 | El Dorado County |
| Gold Country Home Park - Water System | CA2900529 | CWS | Sacramento | 60 | Nevada County |
| Gold Hill Mobilehome Park | CA3100043 | CWS | Roseville | 75 | Placer County |
| Gold Leaf Farming Llc | CA1000607 | NTNCWS | Firebaugh | 58 | Fresno County |
| Gold Mountain Csd | CA3205003 | CWS | Portola | 106 | Plumas County |
| Gold Rock Ranch | CA1300546 | CWS | Winterhaven | 45 | Imperial County |
| Gold Rush Mobile Home Park | CA5500128 | CWS | San Juan Capistrano | 67 | Tuolumne County |
| Golden Acres Trailer Park | CA5200514 | CWS | Red Bluff | 45 | Tehama County |
| Golden Empire Concrete Company | CA1503336 | NTNCWS | Fresno | 53 | Kern County |
| Golden Era Productions | CA3301280 | CWS | San Jacinto | 500 | Riverside County |
| Golden Feather Mhp | CA0400030 | CWS | Sacramento | 275 | Butte County |
| Golden Heights Mutual Water Company | CA4300992 | CWS | Gilroy | 66 | Santa Clara County |
| Golden Hills Mutual Water Co | CA3100528 | CWS | Loomis | 84 | Placer County |
| Golden Meadows Csd | CA5201147 | CWS | Red Bluff | 102 | Tehama County |
| Golden Oaks Mobile Home Park | CA0400023 | CWS | Sacramento | 75 | Butte County |
| Golden Sands Mobile Home Park | CA1900649 | CWS | Rosemead | 450 | Los Angeles County |
| Golden Sierra Estates_Fka Mother Lode | CA5500125 | CWS | Sonora | 210 | Tuolumne County |
| Golden State Vintners - Fresno | CA1000362 | NTNCWS | Fresno | 45 | Fresno County |
| Golden State Vintners Ws | CA2701550 | NTNCWS | Soledad | 70 | Monterey County |
| Golden State Water Co - Apple Vly North | CA3610105 | CWS | Apple Valley | 2,097 | San Bernardino County |
| Golden State Water Co - Lucerne | CA3610108 | CWS | Apple Valley | 590 | San Bernardino County |
| Golden State Water Co - Morongo Del Sur | CA3610063 | CWS | Apple Valley | 1,715 | San Bernardino County |
| Golden State Water Co - San Juan Oaks | CA3510008 | CWS | Rancho Cordova | 260 | San Benito County |
| Golden State Water Co. - Robbins | CA5100107 | CWS | Rancho Cordova | 207 | Sutter County |
| Golden State Water Company - Edna | CA4010023 | CWS | Santa Maria | 1,495 | San Luis Obispo County |
| Golden State Water Company - Lake Marie | CA4210022 | CWS | Rancho Cordova | 548 | Santa Barbara County |
| Golden State Water Company - South Shore | CA1700519 | CWS | Rancho Cordova | 30 | Lake County |
| Golden State Water Company - Tanglewood | CA4210021 | CWS | Santa Maria | 1,979 | Santa Barbara County |
| Golden State Water Company-Cypress Ridge | CA4010040 | CWS | Rancho Cordova | 2,032 | San Luis Obispo County |
| Golden State Water Desert View | CA3600279 | CWS | Apple Valley | 120 | San Bernardino County |
| Golden State Water Morongo Delnorte | CA3600270 | CWS | Apple Valley | 366 | San Bernardino County |
| Golden Valley Almonds | CA5000548 | NTNCWS | Denair | 25 | Stanislaus County |
| Golden Valley Municipal Water District | CA1900767 | CWS | Gorman | 70 | Los Angeles County |
| Gonzalez Mhp | 090600022 | CWS | Thermal | 41 | |
| Goose Creek Golf Club | CA3303072 | NTNCWS | Mira Loma | 28 | Riverside County |
| Gooselake Water Company | CA1500584 | CWS | Bakersfield | 90 | Kern County |
| Gordon Acres Water Co | CA3600297 | CWS | Lucerne Valley | 200 | San Bernardino County |
| Gosford Road Water Company | CA1502622 | CWS | Bakersfield | 50 | Kern County |
| Gotham Greens | CA4810043 | NTNCWS | Dixon | 60 | Solano County |
| Gp Anacapa Foods, Llc. | CA5602516 | NTNCWS | Oxnard | 50 | Ventura County |
| Grace Mennonite School | CA2400099 | NTNCWS | Winton | 100 | Merced County |
| Grace Valley Christian Center | CA5700784 | NTNCWS | Davis | 304 | Yolo County |
| Graeagle Water Company | CA3210005 | CWS | Graeagle | 737 | Plumas County |
| Gran Cielo Mutual Water Company | CA4000853 | CWS | Los Osos | 139 | San Luis Obispo County |
| Gran Mutual Water Co | CA0400008 | CWS | Chico | 290 | Butte County |
| Grand View School | CA5400620 | NTNCWS | Dinuba | 423 | Tulare County |
| Granite Construction Company | CA3303026 | NTNCWS | Indio | 40 | Riverside County |
| Granite Construction Water System | CA1502580 | NTNCWS | Bakersfield | 40 | Kern County |
| Granville Farms, Llc | CA1000645 | NTNCWS | Fresno | 25 | Fresno County |
| Graton Commerce Center | CA4901368 | NTNCWS | San Francisco | 30 | Sonoma County |
| Graton Mutual Water System | CA4901221 | CWS | Rohnert Park | 50 | Sonoma County |
| Gratton School | CA5000273 | NTNCWS | Denair | 141 | Stanislaus County |
| Gravenstein Business Park | CA4901130 | NTNCWS | San Anselmo | 50 | Sonoma County |
| Gravenstein School District-Gravenstein | CA4900708 | NTNCWS | Sebastopol | 398 | Sonoma County |
| Gravenstein School District-Hillcrest | CA4900711 | NTNCWS | Sebastopol | 289 | Sonoma County |
| Graves School Ws | CA2702180 | NTNCWS | Salinas | 56 | Monterey County |
| Great Western Elementary School | CA1000185 | NTNCWS | Reedley | 388 | Fresno County |
| Green Acres Mobile Home Estate | CA1000229 | CWS | Fresno | 350 | Fresno County |
| Green Acres Mutual Water | CA4300573 | CWS | Morgan Hill | 53 | Santa Clara County |
| Green Acres Wa | CA2701647 | CWS | Castroville | 56 | Monterey County |
| Green Diamond Resource Company - Korbel | CA1200715 | CWS | Korbel | 250 | Humboldt County |
| Green Gulch Farm | CA2100565 | CWS | Muir Beach | 75 | Marin County |
| Green Mountain Water Company | CA4300560 | CWS | Morgan Hill | 80 | Santa Clara County |
| Green Real Estate Enterprises Llc | CA2300804 | NTNCWS | Mendocino | 108 | Mendocino County |
| Green River Mutual Water Co. | CA4000554 | CWS | Paso Robles | 350 | San Luis Obispo County |
| Green Valley Cwd | CA1910244 | CWS | Green Valley | 1,275 | Los Angeles County |
| Green Valley Floral-Potter Rd Ws | CA2701151 | NTNCWS | Salinas | 30 | Monterey County |
| Green Valley Mwc | CA3610023 | CWS | Green Valley Lake | 2,993 | San Bernardino County |
| Greenhaven Hoa | CA3200195 | CWS | Greenville | 38 | Plumas County |
| Greenheart Farms | CA4000211 | NTNCWS | Arroyo Grande | 91 | San Luis Obispo County |
| Greenhorn Creek Csd | CA3200188 | CWS | Portola | 280 | Plumas County |
| Greenlaw Modesto Investors Llc | CA5000384 | NTNCWS | Stockton | 142 | Stanislaus County |
| Gregori High School | CA5000568 | NTNCWS | Modesto | 2,000 | Stanislaus County |
| Grenada Sanitary District | CA4700523 | CWS | Grenada | 289 | Siskiyou County |
| Grgich Hills | CA2800536 | NTNCWS | Rutherford | 25 | Napa County |
| Gridley Farm Labor Housing | CA0400012 | CWS | Chico | 460 | Butte County |
| Grier Mutual Water Company | CA5400728 | CWS | Springville | 47 | Tulare County |
| Grimmway Enterprises - Cal Organic Therm | CA3301176 | NTNCWS | Bakersfield | 360 | Riverside County |
| Grimmway Enterprises-Malaga Water System | CA1503093 | NTNCWS | Bakersfield | 1,200 | Kern County |
| Grimmway Farms - David Road | CA1503688 | NTNCWS | Bakersfield | 114 | Kern County |
| Grimmway Farms Coachella Valley Facility | CA3303112 | NTNCWS | Bakersfield | 245 | Riverside County |
| Grimmway Farms- Frozen Foods | CA1500597 | NTNCWS | Bakersfield | 300 | Kern County |
| Grindstone Rancheria | 090605004 | CWS | Elk Creek | 150 | Tehama County |
| Grizzly Creek Ranch Snj | CA3205005 | NTNCWS | Portola | 300 | Plumas County |
| Grizzly Flats Community Servic | CA0910006 | CWS | Grizzly Flats | 1,093 | El Dorado County |
| Grizzly Lake Csd-Crocker/Welch | CA3200107 | CWS | Portola | 215 | Plumas County |
| Grizzly Lake Csd-Delleker | CA3200104 | CWS | Portola | 657 | Plumas County |
| Grizzly Ranch Csd | CA3205006 | CWS | Portola | 118 | Plumas County |
| Groskopf Warehouse & Logistics | CA4901218 | NTNCWS | Sonoma | 60 | Sonoma County |
| Grover Landscape Water System | CA5000580 | NTNCWS | Modesto | 125 | Stanislaus County |
| Growers Company Inc Ws | CA2702202 | NTNCWS | Somerton | 71 | Monterey County |
| Growers Direct Nut Company | CA5000596 | NTNCWS | Hughson | 25 | Stanislaus County |
| Growers Service Assn Ws (Ice) | CA2702484 | NTNCWS | Salinas | 500 | Monterey County |
| Growers Transplanting Ws | CA2701153 | NTNCWS | Salinas | 58 | Monterey County |
| Gsa Calexico Port Of Entry | CA1310016 | NTNCWS | Calexico | 25 | Imperial County |
| Gsa Tecate Port Of Entry | CA3710048 | NTNCWS | San Diego | 70 | San Diego County |
| Guadalupe Cooling Company | CA4000555 | NTNCWS | Nipomo | 35 | San Luis Obispo County |
| Guardian Industries Llc | CA1000383 | NTNCWS | Kingsburg | 245 | Fresno County |
| Guatay Mutual Benefit Corporation | CA3700897 | CWS | Guatay | 100 | San Diego County |
| Gundlach Bundschu Winery | CA4901018 | NTNCWS | Sonoma | 51 | Sonoma County |
| H & J Water Company | CA3700073 | CWS | Julian | 86 | San Diego County |
| H And R Facilities | CA1000673 | NTNCWS | Sanger | 115 | Fresno County |
| H C Muddox Co | CA3400240 | NTNCWS | Sacramento | 70 | Sacramento County |
| H2O, Inc | CA4000741 | CWS | Arroyo Grande | 70 | San Luis Obispo County |
| Halcyon Water System | CA4000501 | CWS | Halcyon | 110 | San Luis Obispo County |
| Halfway House Cafe | CA1900715 | NTNCWS | Agua Dulce | 112 | Los Angeles County |
| Halter Ranch | CA4000861 | NTNCWS | Paso Robles | 39 | San Luis Obispo County |
| Hamilton Branch Csd | CA3210010 | CWS | Lake Almanor | 1,874 | Plumas County |
| Hamilton School | CA3301309 | NTNCWS | Hemet | 705 | Riverside County |
| Hanford Christian School | CA1600009 | NTNCWS | Hanford | 175 | Kings County |
| Hanot Foundation Inc | CA3901276 | CWS | Lockeford | 38 | San Joaquin County |
| Happy Acres Mutual Benefit Water System | CA4900512 | CWS | Cotati | 260 | Sonoma County |
| Happy Acres Mwc | CA4300551 | CWS | Gilroy | 220 | Santa Clara County |
| Happy Camp C.S.D. | CA4710012 | CWS | Happy Camp | 1,100 | Siskiyou County |
| Happy Harbor (Sws) | CA3400128 | CWS | Isleton | 60 | Sacramento County |
| Harbin Hot Springs | CA1700511 | NTNCWS | Middletown | 101 | Lake County |
| Harbor View Mutual Water Company | CA1700568 | CWS | Kelseyville | 550 | Lake County |
| Harbor View Wa | CA2701498 | CWS | Salinas | 75 | Monterey County |
| Hard Rock Casino Tejon | 090600181 | NTNCWS | Yucaipa | 1,500 | |
| Hardwick Water Company | CA1600507 | CWS | Hanford | 69 | Kings County |
| Harmony Haven | CA3301055 | CWS | Riverside | 69 | Riverside County |
| Harmony Village | CA5100125 | CWS | Marysville | 25 | Sutter County |
| Harney Lane Migrant Center Ws | CA3900581 | NTNCWS | Sacramento | 500 | San Joaquin County |
| Harrington Rd Ws #07 | CA2702620 | NTNCWS | Salinas | 26 | Monterey County |
| Harris Farms Headquarters | CA1009027 | CWS | Coalinga | 140 | Fresno County |
| Harris Farms South 101-144 | CA1009028 | CWS | Coalinga | 75 | Fresno County |
| Harris Farms/Horse Barn | CA1000213 | CWS | Coalinga | 20 | Fresno County |
| Harris Feeding Company | CA1009078 | CWS | Coalinga | 22 | Fresno County |
| Harris Moran Seed Company | CA4810030 | NTNCWS | Davis | 64 | Solano County |
| Harris Moran Seed Company - Water | CA5700537 | NTNCWS | Davis | 25 | Yolo County |
| Harris Ranch Beef Co | CA1000526 | NTNCWS | Selma | 1,009 | Fresno County |
| Harris Ranch Restaurant | CA1000214 | NTNCWS | Coalinga | 750 | Fresno County |
| Harris Woolf Almonds-Ballico | CA2400226 | NTNCWS | Ballico | 65 | Merced County |
| Harrison Rd Ws #01 | CA2700592 | NTNCWS | Salinas | 40 | Monterey County |
| Hart Creek Estates Mutual Water Co. | CA1503329 | CWS | Bakersfield | 148 | Kern County |
| Hart Flat Bear Mutual Water | CA1500556 | CWS | Bakersfield | 56 | Kern County |
| Hart- Ransom Union School & District | CA5000133 | NTNCWS | Modesto | 650 | Stanislaus County |
| Hartland Christian Camp | CA5400505 | CWS | Badger | 163 | Tulare County |
| Hartley Mutual Water System | CA0400003 | CWS | Chico | 41 | Butte County |
| Hartnell Rd Ws #1 | CA2702681 | NTNCWS | Salinas | 69 | Monterey County |
| Harvest At Mendosas | CA2300802 | NTNCWS | Fort Bragg | 45 | Mendocino County |
| Harvest Moon Mutual Water Co | CA1500546 | CWS | Bakersfield | 138 | Kern County |
| Hat Creek Highlands Mutual Water Co | CA4500023 | CWS | Bella Vista, Ca | 88 | Shasta County |
| Havasu Water Company | 090600202 | CWS | Havasu Lake | 361 | |
| Haven Acres River Club Inc | CA3900813 | CWS | Lathrop | 100 | San Joaquin County |
| Haven Humane Water System | CA4500344 | NTNCWS | Redding | 60 | Shasta County |
| Hawkins Water Co-Cal Water Service (Puc) | CA4900546 | CWS | San Jose | 91 | Sonoma County |
| Hay Kingdom | CA5700795 | NTNCWS | Winters | 27 | Yolo County |
| Haykingdom, Inc. | CA1300693 | NTNCWS | Imperial | 32 | Imperial County |
| Hearst Monument State Park | CA4010300 | NTNCWS | San Simeon | 215 | San Luis Obispo County |
| Heath Brimhall P.O.A. | CA1502629 | CWS | Bakersfield | 39 | Kern County |
| Heather Glen Community Service Dist | CA3100038 | CWS | Applegate | 250 | Placer County |
| Heavenly Oaks | CA3700071 | CWS | Santee | 300 | San Diego County |
| Heavenly Ski Creek Station | CA0900660 | NTNCWS | Stateline | 1,000 | El Dorado County |
| Heck Cellars Water System | CA1502012 | NTNCWS | Digiorgio | 47 | Kern County |
| Hedge Training Facility | CA3400475 | NTNCWS | Sacramento | 25 | Sacramento County |
| Heights Mutual Water Company | CA4900612 | CWS | Forestville | 363 | Sonoma County |
| Hellwig Products Company Inc | CA5403141 | NTNCWS | Visalia | 51 | Tulare County |
| Helm School | CA1000186 | CWS | Helm | 25 | Fresno County |
| Hemlock Mutual Water Co. | CA1910053 | CWS | El Monte | 686 | Los Angeles County |
| Henry Miller Reclamation District | CA2400196 | NTNCWS | Dos Palos | 41 | Merced County |
| Heritage House | CA2300541 | NTNCWS | Redding | 50 | Mendocino County |
| Herlong Public Utility District | CA1805007 | CWS | Herlong | 831 | Lassen County |
| Hess Winery | CA2801016 | CWS | Napa | 100 | Napa County |
| Hhw&P Moccasin Compound-Sfpuc | CA3810003 | CWS | Burlingame | 410 | San Francisco County, Tuolumne County |
| Hi Desert Mwc | CA3600123 | CWS | Barstow | 112 | San Bernardino County |
| Hidden Acres Trailer Villa | CA4800564 | CWS | Morgan Hill | 80 | Solano County |
| Hidden Canyon Ranch Mwc | CA2702554 | CWS | Salinas | 62 | Monterey County |
| Hidden Harbor Marina & Rvp | CA5200526 | CWS | Fremont | 70 | Tehama County |
| Hidden Meadow Mutual Water Co | CA4400645 | CWS | Scotts Valley | 45 | Santa Cruz County |
| Hidden Valley Community Association | CA3103836 | CWS | Granite Bay | 499 | Placer County |
| Hidden Valley Wa | CA2700594 | CWS | Salinas | 81 | Monterey County |
| Hidden Views Mhp Ws | CA2700606 | CWS | King City | 65 | Monterey County |
| High Desert Adult & Teen Challenge | CA1805011 | NTNCWS | Susanville | 25 | Lassen County |
| High Desert Detention Center | CA3601182 | CWS | Adelanto | 1,400 | San Bernardino County |
| High Valleys Water District | CA3301775 | CWS | Banning | 733 | Riverside County |
| Highland Mobile Home Park | CA1410007 | CWS | Bishop | 1,260 | Inyo County |
| Higuera Apartments | CA4000563 | CWS | San Luis Obispo | 30 | San Luis Obispo County |
| Hill Country Community Clinic & Wellness | CA4500341 | NTNCWS | Round Mountain | 150 | Shasta County |
| Hills Ranch Mutual Water Company | CA2300832 | CWS | Mendocino | 79 | Mendocino County |
| Hillsview Homes | CA5010007 | CWS | Modesto | 887 | Stanislaus County |
| Hilltop Mwa | CA2702163 | NTNCWS | Moss Landing | 50 | Monterey County |
| Hilltop Ranch - Turlock Road | CA2400330 | NTNCWS | Ballico | 140 | Merced County |
| Hilltop Ranch-Looney Road | CA2400329 | NTNCWS | Ballico | 36 | Merced County |
| Hillview Acres Mutual Water Company | CA1500448 | CWS | Weldon | 36 | Kern County |
| Hilmar Cheese Company | CA2400170 | NTNCWS | Hilmar | 979 | Merced County |
| Hilton Mutual Water Company | CA4901309 | CWS | Forestville | 36 | Sonoma County |
| Hines Nurseries Winters North | CA4810020 | NTNCWS | Winters | 150 | Solano County |
| Hines Nursery Winters South | CA4810033 | NTNCWS | Winters | 100 | Solano County |
| Hitchcock Rd Ws #01 | CA2702320 | CWS | Salinas | 35 | Monterey County |
| Hitchcock Rd Ws #02 | CA2702584 | NTNCWS | Salinas | 100 | Monterey County |
| Hitchin Lucerne Inc | CA3601106 | NTNCWS | Lucerne Valley | 85 | San Bernardino County |
| Hkn Llc | CA4300783 | NTNCWS | San Jose | 50 | Santa Clara County |
| Hmc Group Cold Storage | CA1000440 | NTNCWS | Kingsburg | 180 | Fresno County |
| Holdgrafer & Associates | CA4000730 | NTNCWS | San Luis Obispo | 30 | San Luis Obispo County |
| Holiday Harbor Inc | CA4500113 | NTNCWS | Obrien | 32 | Shasta County |
| Holiday Mobile Village | CA3400335 | CWS | Menlo Park | 200 | Sacramento County |
| Holland Heights Mutual Water Company | CA4900548 | CWS | Santa Rosa | 300 | Sonoma County |
| Hollister Ranch Estates | CA3500904 | CWS | Hollister | 150 | San Benito County |
| Hollister Sda Christian School | CA3510011 | NTNCWS | Hollister | 122 | San Benito County |
| Holly Hills Mwc | CA2701789 | CWS | Salinas | 108 | Monterey County |
| Holly Ranch Village | CA2300735 | CWS | Fort Bragg | 50 | Mendocino County |
| Holt 7518 | CA5105014 | NTNCWS | Pleasant Grove | 25 | Sutter County |
| Holt Of California | CA5100153 | NTNCWS | Pleasant Grove | 144 | Sutter County |
| Home Church, The | CA3901416 | NTNCWS | Lodi | 116 | San Joaquin County |
| Home Garden Csd | CA1610007 | CWS | Hanford | 1,750 | Kings County |
| Home Gardens County Wd | CA3310018 | CWS | Corona | 3,095 | Riverside County |
| Hometown Colonial Estates Llc | CA3400217 | CWS | Rancho Cordova | 400 | Sacramento County |
| Hometown Water Association | CA1500564 | CWS | Ridgecrest | 25 | Kern County |
| Honcut Elementary School | CA0400060 | NTNCWS | Palermo | 25 | Butte County |
| Honda Proving Center | CA1503243 | NTNCWS | California City | 50 | Kern County |
| Honey Lake Campground | CA1800522 | CWS | Milford | 25 | Lassen County |
| Honig Winery | CA2800034 | NTNCWS | Rutherfrord | 38 | Napa County |
| Hood Water Maintence Dist [Sws] | CA3400101 | CWS | Sacramento | 267 | Sacramento County |
| Hoot Owl Creek/Alex. Valley Vineyards Jv | CA4901135 | NTNCWS | Healdsburg | 46 | Sonoma County |
| Hope Elementary School District | CA5400994 | NTNCWS | Porterville | 264 | Tulare County |
| Hope Foundation/Moriah Heights | CA0300062 | CWS | Plymouth | 299 | Amador County |
| Hopeton School | CA2400076 | NTNCWS | Merced | 42 | Merced County |
| Hopland Public Utility District | CA2310010 | CWS | Ukiah | 1,076 | Mendocino County |
| Horicon School | CA4900680 | NTNCWS | Annapolis | 100 | Sonoma County |
| Horizon Lane Water Supply | CA4000770 | NTNCWS | San Luis Obispo | 32 | San Luis Obispo County |
| Horizon Nut Llc | CA5401033 | NTNCWS | Tulare | 300 | Tulare County |
| Hornbrook C.S.D. | CA4700513 | CWS | Hornbrook | 280 | Siskiyou County |
| Houghton-Kearney School | CA1000206 | NTNCWS | Fresno | 252 | Fresno County |
| Howard Elementary School | CA2000600 | NTNCWS | Madera | 618 | Madera County |
| Howell Mountain Mutual Water Company | CA2810001 | CWS | Angwin | 1,244 | Napa County |
| Howell Mountain School | CA2800970 | NTNCWS | Angwin | 100 | Napa County |
| Howell'S Lakeside Water Co. | CA5200007 | CWS | Red Bluff | 75 | Tehama County |
| Howonquet Community(Smith River) | 090605060 | CWS | Smith River | 220 | Del Norte County |
| Hrc C.S.D. | CA0800556 | CWS | Crescent City | 185 | Del Norte County |
| Huckleberry Mutual Water Company | CA4900634 | CWS | Cazadero | 45 | Sonoma County |
| Hudson Ranch Power I Llc | CA1300679 | NTNCWS | Calipatria | 39 | Imperial County |
| Huebert Farms | CA1000663 | NTNCWS | Reedley | 30 | Fresno County |
| Hughes-Elizabeth Lake Unified School Dis | CA1900886 | NTNCWS | Lake Hughes | 550 | Los Angeles County |
| Hughson Nut Company Water System | CA5000470 | NTNCWS | Hughson | 110 | Stanislaus County |
| Hughson Nut Inc. - Livingston | CA2400162 | NTNCWS | Hughson | 146 | Merced County, Stanislaus County |
| Humane Society Of Sonoma County | CA4901244 | NTNCWS | Santa Rosa | 27 | Sonoma County |
| Humboldt Bay Mwd | CA1210013 | CWS | Eureka | 680 | Humboldt County |
| Humboldt Creamery | CA1206016 | NTNCWS | Fortuna | 100 | Humboldt County |
| Humboldt Highlands Mutual | CA0400123 | CWS | Forest Ranch | 58 | Butte County |
| Humboldt Woodlands Mutual | CA0400149 | CWS | Forest Ranch | 64 | Butte County |
| Hume Lake Christian Camps, Inc | CA1010013 | CWS | Hume | 1,519 | Fresno County |
| Hungry Gulch Mwc | CA1500436 | CWS | Lake Isabella | 36 | Kern County |
| Hunter Valley Csd | CA0800557 | CWS | Klamath | 87 | Del Norte County |
| Hunter'S Fishing Resort | CA5200527 | CWS | Millbrae | 50 | Tehama County |
| Huppe Moore Landscape | CA3104508 | NTNCWS | Folsom | 30 | Placer County |
| Hydesville Co. W.D. | CA1210019 | CWS | Hydesville | 1,389 | Humboldt County |
| Hynes Estates Mutual Water Co. | CA3000519 | CWS | Anaheim | 168 | Orange County |
| I & E Lath Mill | CA2300906 | NTNCWS | Philo | 31 | Mendocino County |
| I-5 And Hwy 198 | CA1000178 | NTNCWS | Avenal | 225 | Fresno County |
| I-5 And Panoche Development | CA1000177 | NTNCWS | Avenal | 85 | Fresno County, Merced County |
| Idyllwild Water District | CA3310019 | CWS | Idyllwild | 3,762 | Riverside County |
| Ihs Nor Cal Youth Trmnt Ctr(Sacred Oaks) | CA5710013 | NTNCWS | Davis | 102 | Yolo County |
| Iid North End Consolidation | CA1300652 | NTNCWS | Imperial | 30 | Imperial County |
| Iid Village | CA1300588 | CWS | Imperial | 37 | Imperial County |
| Il Vineto | CA3900624 | CWS | Hillsborough | 160 | San Joaquin County |
| Ilead Agua Dulce Charter School | CA1900707 | NTNCWS | Acton | 450 | Los Angeles County |
| Imerys Filtration Minerals, Inc | CA4200854 | NTNCWS | Lompoc | 200 | Santa Barbara County |
| Imperial Lakes Inc. | CA1300628 | CWS | Alpine | 40 | Imperial County |
| Imperial Manor Mobilehome Community | CA3400190 | CWS | Vacaville | 280 | Sacramento County |
| Improvement District No. 1 | CA5400968 | CWS | Three Rivers | 200 | Tulare County |
| Independence Water System | CA4000835 | NTNCWS | San Luis Obispo | 25 | San Luis Obispo County |
| Indian Creek Csd | CA1410005 | CWS | Bishop | 1,030 | Inyo County |
| Indian Creek Trailer Park | CA5303002 | CWS | Santa Rosa | 41 | Trinity County |
| Indian Hills Camp | CA3701476 | CWS | Jamul | 36 | San Diego County |
| Indian Oaks Trailer Park | CA3301330 | CWS | Murrieta | 5 | Riverside County |
| Indian Village | 090605154 | CWS | Mecca | 35 | |
| Indianola School | CA1000187 | NTNCWS | Selma | 511 | Fresno County |
| Ingomar Packing | CA2400154 | NTNCWS | Los Banos | 715 | Merced County |
| International Paper - Exeter Bulk | CA5403121 | NTNCWS | Exeter | 106 | Tulare County |
| Interstate 5 Utility Company | CA1500491 | NTNCWS | Bakersfield | 100 | Kern County |
| Inverness Public Utility Dist | CA2110001 | CWS | Inverness | 1,445 | Marin County |
| Inyo County Pwd - Independence | CA1410008 | CWS | Independence | 1,108 | Inyo County |
| Inyo County Pwd - Laws Town | CA1400525 | NTNCWS | Independence | 50 | Inyo County |
| Inyo County Pwd - Lone Pine | CA1410009 | CWS | Independence | 1,835 | Inyo County |
| Inyokern Csd | CA1510036 | CWS | Inyokern | 1,125 | Kern County |
| Ione Band Of Miwok Indians | CA0300078 | CWS | Plymouth | 40 | Amador County |
| Irish Beach Water District | CA2310012 | CWS | Manchester | 254 | Mendocino County |
| Irish Hills Mutual Water Co | CA4000203 | CWS | San Luis Obispo | 135 | San Luis Obispo County |
| Ironwood Camp | CA3601015 | CWS | Newberry Springs | 45 | San Bernardino County |
| Irwindale Brewery Yard (Iby) | CA1900035 | NTNCWS | Irwindale | 300 | Los Angeles County |
| Island Union School | CA1600017 | NTNCWS | Lemoore | 416 | Kings County |
| Islander Marina | CA3900653 | CWS | Sacramento | 150 | San Joaquin County |
| Isot Community Water System | CA2500911 | CWS | Canby | 60 | Modoc County |
| Ivanpah Solar Thermal Power Plant | CA3601181 | NTNCWS | Carlsbad | 56 | San Bernardino County |
| Ivcsd Crescent Mills | CA3200510 | CWS | Greenville | 206 | Plumas County |
| Ivcsd-Greenville | CA3210001 | CWS | Greenville | 795 | Plumas County |
| Iverson & Jacks Apts Ws | CA2701068 | CWS | Salinas | 86 | Monterey County |
| J B Hunt Transport Inc | CA3901417 | NTNCWS | Lowell | 50 | San Joaquin County |
| J G Boswell Tomato Company Llc | CA1503380 | NTNCWS | Corcoran | 38 | Kern County |
| J Lohr Winery | CA4000864 | NTNCWS | Paso Robles | 125 | San Luis Obispo County |
| J M Eagle (Ws) | CA3900742 | NTNCWS | Stockton | 100 | San Joaquin County |
| J M Sims Water Supply | CA4000768 | NTNCWS | San Luis Obispo | 34 | San Luis Obispo County |
| J R Simplot Company | CA1000176 | NTNCWS | Helm | 40 | Fresno County |
| J Vineyards & Winery | CA4900904 | NTNCWS | Healdsburg | 50 | Sonoma County |
| J.G. Boswell Company Water System | CA1500600 | NTNCWS | Corcoran | 63 | Kern County |
| Jackson Hide-A-Way | CA1300629 | CWS | Ocotillo | 25 | Imperial County |
| Jacoby Creek Cwd | CA1210021 | CWS | Arcata | 924 | Humboldt County |
| Jacumba Community Sd | CA3710011 | CWS | Jacumba | 561 | San Diego County |
| Jahant Woods Cellars | CA3902212 | NTNCWS | Acampo | 90 | San Joaquin County |
| James Court Water System | CA4901445 | CWS | Santa Rosa | 208 | Sonoma County |
| Janesville Elementary School | CA1800577 | NTNCWS | Janesville | 400 | Lassen County |
| Jardines Del Valle | CA4400664 | CWS | Watsonville | 130 | Santa Cruz County |
| Jarvis Mutual Water System | CA4400611 | CWS | Santa Cruz | 125 | Santa Cruz County |
| Jasmine Vineyards Cold Storage | CA1504007 | NTNCWS | Delano | 27 | Kern County |
| Jdh | CA5403048 | NTNCWS | Pixley | 75 | Tulare County |
| Jean Harvie School [Sws] | CA3400364 | NTNCWS | Sacramento | 30 | Sacramento County |
| Jed Smith Homeowners Assn. | CA0800825 | CWS | Crescent City | 58 | Del Norte County |
| Jefferson Esd-Jefferson School | CA3901107 | NTNCWS | Tracy | 483 | San Joaquin County |
| Jennings Wwtp | CA5010044 | NTNCWS | Modesto | 30 | Stanislaus County |
| Jensen Precast | CA3901461 | NTNCWS | Sparks | 25 | San Joaquin County |
| Jewel Date Co. Inc. | CA3301939 | NTNCWS | Thermal | 88 | Riverside County |
| Jireh Packing Group - Cutler | CA5403145 | NTNCWS | Orange Cove | 30 | Tulare County |
| John B. Sanfilippo & Son, Inc. | CA2400231 | NTNCWS | Gustine | 120 | Merced County |
| John Hovannisian Water System | CA2000647 | CWS | Fresno | 80 | Madera County |
| John Latoracca Correctional Facility | CA2400172 | CWS | Merced | 800 | Merced County |
| Johns Manville | CA1100232 | NTNCWS | Willows | 330 | Glenn County |
| Johnstonville Elementary School | CA1800574 | NTNCWS | Johnstonville | 230 | Lassen County |
| Johnstonville Water System | CA1805001 | NTNCWS | Susanville | 40 | Lassen County |
| Joint Regional Water Supply System | CA3010071 | CWS | Laguna Beach | 0 | Orange County |
| Jojoba Hills Skp Resort, Inc. | CA3301385 | NTNCWS | Aguanga | 912 | Riverside County |
| Jolly Giant Flea Market | CA4500213 | NTNCWS | Anderson | 75 | Shasta County |
| Jonata Homeowners Association | CA4200814 | CWS | Buellton | 38 | Santa Barbara County |
| Jordan Vineyard & Winery | CA4901084 | NTNCWS | Healdsburg | 50 | Sonoma County |
| Joseph Cold Storage Llc | CA1503652 | NTNCWS | Delano | 25 | Kern County |
| Joseph Gallo Cheese Co. | CA2400206 | NTNCWS | Atwater | 384 | Merced County |
| Jost Post Wa | CA2700535 | CWS | Salinas | 56 | Monterey County |
| Js West Milling Co Hilmar Ranch | CA2400345 | NTNCWS | Modesto | 64 | Merced County |
| Juanita Court Mutual Water | CA5200588 | CWS | Red Bluff | 33 | Tehama County |
| Jubilee Mwc | CA3600139 | CWS | Lucerne Valley | 759 | San Bernardino County |
| Julian Community Services District | CA3700909 | CWS | Julian | 617 | San Diego County |
| Junction City School | CA5304209 | NTNCWS | Junction City | 80 | Trinity County |
| Junction Elementary School | CA4700585 | NTNCWS | Yreka | 40 | Siskiyou County |
| Junction School District | CA4500163 | NTNCWS | Palo Cedro | 700 | Shasta County |
| June Lake Pud - Down Canyon | CA2610004 | CWS | June Lake | 310 | Mono County |
| June Lake Pud Village | CA2610002 | CWS | June Lake | 263 | Mono County |
| Juniper Riviera Cwd | CA3600222 | CWS | Apple Valley | 858 | San Bernardino County |
| Juvenile Justice Campus | CA1000570 | CWS | Fresno | 565 | Fresno County |
| Kashia | 090600135 | CWS | Santa Rosa | 153 | Sonoma County |
| Keefer Creek Estates | CA0400151 | CWS | Chico | 160 | Butte County |
| Keeler Community Service District | CA1400036 | CWS | Bakerfield | 66 | Inyo County |
| Keenan Farms Inc. | CA1600303 | NTNCWS | Kettleman | 64 | Kings County |
| Kellogg Garden Products | CA3901306 | NTNCWS | Lockeford | 185 | San Joaquin County |
| Kelly Mutual Water Company | CA4900560 | CWS | Sebastopol | 135 | Sonoma County |
| Ken Mar Gardens | CA4000648 | CWS | Arroyo Grande | 84 | San Luis Obispo County |
| Kendall-Jackson Winery Ws | CA2702496 | NTNCWS | Santa Maria | 45 | Monterey County |
| Kennon Water Company | CA4300521 | CWS | San Jose | 142 | Santa Clara County |
| Kenwood Village Water Company (Puc) | CA4910025 | CWS | Santa Rosa | 1,029 | Sonoma County |
| Kenwood Vineyards And Winery | CA4900875 | NTNCWS | Guerneville | 50 | Sonoma County |
| Keough'S Hot Springs | CA1400034 | CWS | Bishop | 75 | Inyo County |
| Kern County Water Agency | CA1510040 | CWS | Bakersfield | 0 | Kern County |
| Kern Energy | CA1502771 | NTNCWS | Bakersfield | 150 | Kern County |
| Kern Mobile Estates Llc | CA1500571 | CWS | Los Angeles | 73 | Kern County |
| Kern Ridge Growers | CA1504003 | NTNCWS | Arvin | 85 | Kern County |
| Kern Valley Mutual Water Company | CA1500252 | CWS | Lake Isabella | 132 | Kern County |
| Kernvale Mutual Water Co | CA1500364 | CWS | Lake Isabella | 75 | Kern County |
| Kettleman City Csd | CA1610009 | CWS | Kettleman City | 1,242 | Kings County |
| Kiefer Landfill [Sws] | CA3400342 | NTNCWS | Sacramento | 50 | Sacramento County |
| Kiernan Business Center | CA5000552 | NTNCWS | Modesto | 120 | Stanislaus County |
| Kiernan/Mchenry Water Company, Inc | CA5000517 | NTNCWS | Long Beach | 25 | Stanislaus County |
| Kind Real Estate, Llc Ws | CA2702812 | NTNCWS | Salinas | 25 | Monterey County |
| Kinecta Fcu | CA4200666 | NTNCWS | Manhattan Beach | 104 | Santa Barbara County |
| King Fresh Packing & Cooling | CA5403083 | NTNCWS | Dinuba | 66 | Tulare County |
| King Island Trailer Park Water System | CA3901114 | CWS | Stockton | 200 | San Joaquin County |
| Kings Canyon High School | CA1000316 | NTNCWS | Reedley | 107 | Fresno County |
| Kings Canyon Mobile Home Park | CA1000267 | CWS | Rancho Sante Fe | 80 | Fresno County |
| Kings Park Apartments | CA1000295 | CWS | Sanger | 160 | Fresno County |
| Kings River Elementary School | CA5400624 | NTNCWS | Kingsburg | 500 | Tulare County |
| Kings River Estates Mutual Water Company | CA5400536 | CWS | Kingsburg | 106 | Tulare County |
| Kings River Hardwick School | CA1600015 | NTNCWS | Hanford | 908 | Kings County |
| Kings River Packing Company | CA1000514 | NTNCWS | Sanger | 500 | Fresno County |
| Kings River Packing-Centerville | CA1000418 | NTNCWS | Sanger | 45 | Fresno County |
| Kings River Point | CA1000405 | CWS | Piedra | 36 | Fresno County |
| Kingvale Property Owners & Water Users | CA2900508 | NTNCWS | Soda Springs | 30 | Nevada County |
| Kinneloa Irrigation Dist. | CA1910035 | CWS | Pasadena | 1,808 | Los Angeles County |
| Kinnybrook Mutual Water Company | CA4901062 | CWS | Kenwood | 48 | Sonoma County |
| Kirkwood Elementary School | CA5200520 | NTNCWS | Corning | 111 | Tehama County |
| Kitayama Brothers | CA4400905 | NTNCWS | Watsonville | 50 | Santa Cruz County |
| Kj Carneros Hills Winery | CA4901254 | NTNCWS | Sonoma | 65 | Sonoma County |
| Klamath C.S.D. | CA0800548 | CWS | Klamath | 240 | Del Norte County |
| Knapheide Truck Equipment Company | CA3901319 | NTNCWS | Stockton | 40 | San Joaquin County |
| Kneeland School | CA1200817 | NTNCWS | Kneeland | 40 | Humboldt County |
| Knights Ferry Comm. Svc. Dist. | CA5000008 | CWS | Knights Ferry | 168 | Stanislaus County |
| Knights Landing Svc. Dist. | CA5710004 | CWS | Woodland | 1,099 | Yolo County |
| Knightsen Community Water System | CA0707547 | CWS | Oakley | 73 | Contra Costa County |
| Knightsen Elementary School | CA0706028 | NTNCWS | Knightsen | 350 | Contra Costa County |
| Knoll Enterprises | CA3600504 | CWS | Ludlow | 500 | San Bernardino County |
| Knott'S Berry Farm | CA3000734 | NTNCWS | Buena Park | 3,000 | Orange County |
| Konocti Shores | CA1700592 | CWS | Orinda | 30 | Lake County |
| Korbel Brothers Winery | CA4900999 | NTNCWS | Guerneville | 296 | Sonoma County |
| Korths Pirates Lair | CA3400135 | CWS | Isleton | 40 | Sacramento County |
| Kranenburg Water System | CA1500560 | CWS | Bakersfield | 42 | Kern County |
| Krista Mutual Water Company | CA1500475 | CWS | Frazier Park | 504 | Kern County |
| Krotona Institute | CA5601401 | CWS | Ojai | 30 | Ventura County |
| Kyburz Mutual Water Company | CA0900300 | CWS | Kyburz | 30 | El Dorado County |
| La Cienega Mhp | 090600041 | CWS | Whittier | 30 | |
| La Cima Fire Center | CA3710802 | CWS | Julian | 60 | San Diego County |
| La Crema Winery | CA4901232 | NTNCWS | Windsor | 75 | Sonoma County |
| La Jolla Eastern | 090605007 | CWS | Pauma Valley | 1,076 | San Diego County |
| La Jolla Western | 090605008 | CWS | Pauma Valley | 296 | San Diego County |
| La Posta Lower Community | 090600056 | CWS | Boulevard | 60 | |
| La Posta Upper | 090605146 | CWS | Boulevard | 73 | |
| La Tierra Heights Mutual | CA2800525 | CWS | Angwin | 67 | Napa County |
| La Torres Park | CA3900991 | CWS | Tracy | 40 | San Joaquin County |
| La Valle Sabbia Inc. | CA1300669 | NTNCWS | El Centro | 60 | Imperial County |
| La Vina School | CA2000601 | NTNCWS | Madera | 302 | Madera County |
| Lacsd - Rimforest | CA3610045 | CWS | Lake Arrowhead | 717 | San Bernardino County |
| Lactalis Heritage Dairy | CA5403074 | NTNCWS | Tulare | 295 | Tulare County |
| Ladera Golf Club | CA3301186 | NTNCWS | Thermal | 1,806 | Riverside County |
| Ladwp - Big Pine | CA1410004 | CWS | Los Angeles | 0 | Inyo County |
| Ladwp - Control Gorge Power Plant | CA1400155 | CWS | Los Angeles | 30 | Inyo County |
| Ladwp - Independence | CA1410002 | CWS | Los Angeles | 0 | Inyo County |
| Ladwp - Keeler Yard | CA1400527 | NTNCWS | Los Angeles | 66 | Inyo County |
| Ladwp - Laws Town | CA1400102 | NTNCWS | Los Angeles | 0 | Inyo County |
| Ladwp - Lone Pine | CA1410003 | CWS | Los Angeles | 0 | Inyo County |
| Ladwp - Mountain View Trailer Court | CA1400099 | CWS | Los Angeles | 31 | Inyo County |
| Laetitia Vineyard & Winery Inc | CA4000221 | NTNCWS | Arroyo Grande | 62 | San Luis Obispo County |
| Laguna Del Sol Inc | CA3400181 | CWS | Wilton | 118 | Sacramento County |
| Laguna Mountain Mutual Water Co. | CA3700422 | CWS | Mt Laguna | 100 | San Diego County |
| Laguna Negra Mutual Water Co. | CA4000705 | CWS | Arroyo Grande | 80 | San Luis Obispo County |
| Laguna Seca Recreation Ws | CA2702009 | NTNCWS | Salinas | 1,248 | Monterey County |
| Laguna Seca Wc | CA2700612 | CWS | Salinas | 162 | Monterey County |
| Laguna Village Rv Park | CA3400397 | CWS | Elk Grove | 28 | Sacramento County |
| Laguna Vista School/Oceanview School Dis | CA5602403 | NTNCWS | Oxnard | 377 | Ventura County |
| Laird Family Estate | CA2800301 | NTNCWS | Napa | 55 | Napa County |
| Lake Alpine Water Company | CA0210001 | CWS | Bear Valley | 625 | Alpine County |
| Lake Canyon Mutual Water Company | CA4300522 | CWS | Los Gatos | 156 | Santa Clara County |
| Lake County Csa 13 - Kono Tayee | CA1700554 | CWS | Lakeport | 449 | Lake County |
| Lake County Csa 2 - Spring Valley | CA1710018 | CWS | Lakeport | 1,531 | Lake County |
| Lake County Csa 20 - Soda Bay | CA1710022 | CWS | Lakeport | 2,003 | Lake County |
| Lake County Csa 21 - North Lakeport | CA1710021 | CWS | Lakeport | 4,046 | Lake County |
| Lake Don Pedro Csd | CA5510008 | CWS | La Grange | 1,700 | Mariposa County, Tuolumne County |
| Lake Elementary School | CA1100440 | NTNCWS | Orland | 205 | Glenn County |
| Lake Elizabeth Mutual Water Co. | CA1910056 | CWS | Elizabeth Lake | 1,790 | Los Angeles County |
| Lake Forest Mutual W.C. | CA1800511 | CWS | Susanville | 565 | Lassen County |
| Lake Francis Mutual Water Company | CA5800805 | CWS | Dobbins | 60 | Yuba County |
| Lake Hemet Mwd-Camp Ground | CA3310080 | CWS | Hemet | 200 | Riverside County |
| Lake Hemet-Garner Valley | CA3310052 | CWS | Hemet | 709 | Riverside County |
| Lake Henshaw Resort Inc. | CA3700900 | CWS | Santa Ysabel | 108 | San Diego County |
| Lake Isabella Community Services Dist | CA1503270 | CWS | Shafter | 500 | Kern County |
| Lake Jodie Water System | CA3600785 | CWS | West Hollyhood | 250 | San Bernardino County |
| Lake Madrone Water District | CA0400014 | CWS | Berry Creek | 297 | Butte County |
| Lake Morena Views Mwc | CA3700924 | CWS | Pasadena | 360 | San Diego County |
| Lake Morena'S Oak Shores Mwc | CA3700923 | CWS | Campo | 670 | San Diego County |
| Lake Of The Woods Mobile Village | CA1500459 | CWS | Lake Of The Woods | 82 | Kern County |
| Lake Of The Woods Mwc | CA1510023 | CWS | Frazier Park | 875 | Kern County, Ventura County |
| Lake San Antonio Mhp Ws | CA2701906 | CWS | San Jose | 84 | Monterey County |
| Lake Shasta Pines Rv Park & Campground | CA4500101 | CWS | Dunsmuir | 90 | Shasta County |
| Lake Shastina C.S.D | CA4710013 | CWS | Weed | 2,790 | Siskiyou County |
| Lake Siskiyou M.W.C. | CA4700549 | CWS | Mt. Shasta | 281 | Siskiyou County |
| Lake Success Mobile Lodge | CA5400660 | CWS | Porterville | 27 | Tulare County |
| Lake View Mutual Water Co. | CA2300606 | CWS | Redwood Valley | 90 | Mendocino County |
| Lake Wohlford Resort | CA3700919 | CWS | Costa Mesa | 250 | San Diego County |
| Lakehead Subd Mutual Water Co | CA4500016 | CWS | Lakehead | 40 | Shasta County |
| Lakeshore Heights Mutual Water | CA4500014 | CWS | Lakehead | 264 | Shasta County |
| Lakeshore Villa Mutual Water Co | CA4500008 | CWS | Lakehead | 54 | Shasta County |
| Lakeside Elementary School | CA1600013 | NTNCWS | Hanford | 388 | Kings County |
| Lakeside Mobile Estates | CA0500075 | CWS | Railroad Flat | 30 | Calaveras County |
| Lakeside Park Association | CA0910019 | CWS | South Lake Tahoe | 924 | El Dorado County |
| Lakeside School | CA1502154 | NTNCWS | Bakersfield | 897 | Kern County |
| Lakeside Sd-Lakeside School | CA4300779 | NTNCWS | Los Gatos | 127 | Santa Clara County |
| Lakeview Apartments | CA4400517 | CWS | Watsonville | 43 | Santa Cruz County |
| Lakeview Hills Community Assoc | CA3103835 | CWS | Folsom | 499 | Placer County |
| Lakeview Ranchos Mutual Water Company | CA1500525 | CWS | Weldon | 120 | Kern County |
| Lakewood Memorial Park & Funeral Home | CA5000117 | NTNCWS | Hughson | 40 | Stanislaus County |
| Lamanuzzi Pantaleo Cs Dehy | CA2000855 | NTNCWS | Madera | 125 | Madera County |
| Lanare Community Services Dist | CA1000053 | CWS | Coalinga | 540 | Fresno County |
| Lancaster Park Mobile Home Park | CA1900038 | CWS | Lancaster | 50 | Los Angeles County |
| Lancaster Water Company | CA1900808 | CWS | Lancaster | 80 | Los Angeles County |
| Land Of Medicine Buddha | CA4400530 | NTNCWS | Soquel | 89 | Santa Cruz County |
| Land Projects Mutual Water Co. | CA1910246 | CWS | Lancaster | 2,800 | Los Angeles County |
| Landale Mutual Water Company | CA1900809 | CWS | Lancaster | 90 | Los Angeles County |
| Lander Veterinary Clinic | CA5000595 | NTNCWS | Turlock | 27 | Stanislaus County |
| Lands Of Promise Mwc | CA1500424 | CWS | Rosamond | 174 | Kern County |
| Larkin Woods Mutual Water Company | CA4900582 | CWS | Sebastopol | 34 | Sonoma County |
| Larry A Shehadey Dairy | CA1000641 | NTNCWS | Fresno | 80 | Fresno County |
| Larsen Ranch 39-40/Water System | CA3901354 | NTNCWS | Manteca | 30 | San Joaquin County |
| Las Colinas Road & Water Assn | CA4400613 | CWS | Santa Maria | 70 | Santa Cruz County |
| Las Cumbres Mutual Water Co | CA4400631 | CWS | Los Gatos | 402 | Santa Cruz County |
| Las Deltas Mutual Water Company | CA1000054 | CWS | Clovis | 375 | Fresno County |
| Las Flores Water Works | CA5200502 | CWS | Gerber | 191 | Tehama County |
| Las Palmas Mobile Home Park | CA0800700 | CWS | Eureka | 120 | Del Norte County |
| Las Positas Mutual Water Company | CA4200572 | CWS | Santa Barbara | 200 | Santa Barbara County |
| Las Ventanas Ranch | CA4000815 | CWS | San Luis Obispo | 108 | San Luis Obispo County |
| Lassen Co. Off. Of Education | CA1800202 | NTNCWS | Susanville | 32 | Lassen County |
| Lassen Community College Dist. | CA1800585 | NTNCWS | Susanville | 1,375 | Lassen County |
| Lassen County Water Works District #1 | CA1810003 | CWS | Bieber | 450 | Lassen County |
| Lassen Mobile Home Park | CA1800524 | CWS | Torrance | 62 | Lassen County |
| Lassen Pines Mutual Water Co Inc | CA4500210 | CWS | Shingletoown | 475 | Shasta County |
| Lassen View Union Elementary School Dist | CA5200538 | NTNCWS | Los Molinos | 350 | Tehama County |
| Lassen View Water District | CA5200548 | CWS | Red Bluff | 85 | Tehama County |
| Lassen Vnp - Headquarters | CA5210503 | NTNCWS | Mineral | 69 | Tehama County |
| Laton High School | CA1000189 | NTNCWS | Laton | 197 | Fresno County |
| Latrobe Elementary School | CA0900410 | NTNCWS | Shingle Springs | 65 | El Dorado County |
| Laura Chenel'S Chevre Inc. | CA4901366 | NTNCWS | Sonoma | 50 | Sonoma County |
| Laureate Water Company | CA4000206 | NTNCWS | San Luis Obispo | 30 | San Luis Obispo County |
| Laurel Community League | CA4400528 | CWS | Los Gatos | 64 | Santa Cruz County |
| Lawndale Mutual Water Company | CA4900588 | CWS | Kenwood | 208 | Sonoma County |
| Lawrence Livermore National Lab-Site 300 | CA3910025 | NTNCWS | Livermore | 270 | San Joaquin County |
| Lawson S Landing | CA2110008 | CWS | Dillon Beach | 946 | Marin County |
| Laytonville County Water District | CA2310011 | CWS | Laytonville | 1,152 | Mendocino County |
| Lazy B Mobilehome Park | CA5000048 | CWS | San Mateo | 125 | Stanislaus County |
| Lazy H Mutual Water Company | CA3700937 | CWS | Pauma Valley | 117 | San Diego County |
| Lazy Landing Mobile Home Park | CA4500081 | CWS | Redding | 250 | Shasta County |
| Lazy S Mobile Ranch | CA1700609 | CWS | Middletown | 73 | Lake County |
| Le Grand Comm Services Dist | CA2410011 | CWS | Le Grand | 1,739 | Merced County |
| Leafwood Community Wa | CA2700624 | CWS | Salinas | 69 | Monterey County |
| Learning Services Corp. | CA4300859 | NTNCWS | Gilroy | 48 | Santa Clara County |
| Leavitt Lake Csd | CA1810004 | CWS | Susanville | 950 | Lassen County |
| Lebec County Water District | CA1510051 | CWS | Lebec | 1,379 | Kern County |
| Lee Vining Public Utility District | CA2610005 | CWS | Lee Vining | 222 | Mono County |
| Lee'S Orchard Owners Association | CA4301062 | CWS | Saratoga | 35 | Santa Clara County |
| Legacy Packing And Cold Storage | CA5403080 | NTNCWS | Dinuba | 125 | Tulare County |
| Leggett Valley School | CA2300785 | NTNCWS | Leggett | 90 | Mendocino County |
| Leisure Acres Mutual Water Company | CA2000534 | CWS | North Fork | 45 | Madera County |
| Leisure Lake Mobile Estates | CA1910066 | CWS | Chandler | 325 | Los Angeles County |
| Leisure Mobile Home Park | CA4900832 | CWS | Santa Rosa | 410 | Sonoma County |
| Leisure Pines Mutual Water Co | CA5500053 | CWS | Twain Harte | 340 | Tuolumne County |
| Lemon Cove Water Company | CA5400616 | CWS | Lemon Cove | 168 | Tulare County |
| Lemons' Market | CA2300900 | NTNCWS | Philo | 150 | Mendocino County |
| Lerdo Sheriff S Facility | CA1502320 | CWS | Bakersfield | 2,800 | Kern County |
| Lewis Cellars | CA2801042 | NTNCWS | Napa | 293 | Napa County |
| Lewiston Community Services District | CA5301002 | CWS | Junction City | 677 | Trinity County |
| Lhoist North America Ws | CA2702259 | NTNCWS | Salinas | 38 | Monterey County |
| Liberty -Yermo | CA3610118 | CWS | Downey | 671 | San Bernardino County |
| Liberty Elementary School | CA5403146 | NTNCWS | Tulare | 818 | Tulare County |
| Liberty Packing Company Llc | CA2400051 | NTNCWS | Los Banos | 120 | Merced County |
| Liberty Park Water Association | CA3000618 | CWS | Huntington Beach | 95 | Orange County |
| Liberty School | CA4900714 | NTNCWS | Petaluma | 225 | Sonoma County |
| Liberty Utilities - Mesa Crest | CA1910241 | CWS | Downey | 1,616 | Los Angeles County |
| Liberty-Bellview Heights | CA3600010 | CWS | Downey | 98 | San Bernardino County |
| Libitzky | CA5000141 | NTNCWS | Roseville | 120 | Stanislaus County |
| Lichau Hylands Mutual Water Company | CA4901381 | CWS | Penngrove | 56 | Sonoma County |
| Lick Observatory-Ucsc | CA4300909 | CWS | Mount Hamilton | 369 | Santa Clara County |
| Lieto Water System (Reach Chartr School) | CA4901190 | NTNCWS | Sebastopol | 30 | Sonoma County |
| Life Water Co-Op | CA1500579 | CWS | Inyokern | 35 | Kern County |
| Lili Valley Water Co. | CA0500027 | CWS | West Point | 126 | Calaveras County |
| Lily Of The Valley Mobile Village | CA1900913 | CWS | Saugus | 657 | Los Angeles County |
| Limoneira Ranch #1 | CA5601201 | CWS | Santa Paula | 813 | Ventura County |
| Lincoln Chan-Home Ranch | CA3400137 | CWS | Courtland | 33 | Sacramento County |
| Lincoln Grove Estates | CA0400020 | CWS | Oroville | 327 | Butte County |
| Lincoln High School Farm | CA3107342 | NTNCWS | Lincoln | 50 | Placer County |
| Linda Falls Terrace Mutual | CA2800527 | CWS | Angwin | 35 | Napa County |
| Linda Vista Mutual Water Co | CA2800528 | CWS | Angwin | 90 | Napa County |
| Linden County Water District | CA3910019 | CWS | Linden | 1,784 | San Joaquin County |
| Linden Usd-Chartville School | CA3902136 | NTNCWS | Ripon | 40 | San Joaquin County |
| Linden Usd-Glenwood School | CA3900756 | NTNCWS | Ripon | 100 | San Joaquin County |
| Linden Usd-Waterloo Elementary | CA3900757 | NTNCWS | Ripon | 225 | San Joaquin County |
| Lindy'S Landing | CA5400537 | CWS | Reedley | 30 | Tulare County |
| Lingate Lane Mutual Water Company | CA4200633 | CWS | Santa Barbara | 55 | Santa Barbara County |
| Linnell Farm Labor Center | CA5400631 | CWS | Visalia | 694 | Tulare County |
| Lion Raisins Packing Company | CA1000486 | NTNCWS | Selma | 80 | Fresno County |
| Little Avenue Water System | CA5200584 | CWS | Red Bluff | 53 | Tehama County |
| Little Baldy Water | CA1900158 | CWS | Llano | 55 | Los Angeles County |
| Little Bear Water Company | CA2710016 | CWS | Soledad | 2,327 | Monterey County |
| Little Lake Mobile Home Park | CA2300705 | CWS | Napa | 38 | Mendocino County |
| Little Potato Slough Mutual | CA3910022 | CWS | Lodi | 560 | San Joaquin County |
| Little River Inn | CA2300617 | NTNCWS | Little River | 95 | Mendocino County |
| Little Shasta School | CA4700578 | NTNCWS | Montague | 30 | Siskiyou County |
| Little Valley Csd | CA1800516 | CWS | Little Valley | 70 | Lassen County |
| Live Oak Acres Mwc Inc. | CA5200535 | CWS | Red Bluff | 80 | Shasta County, Tehama County |
| Live Oak Child Care Center | CA5103335 | NTNCWS | Live Oak | 105 | Sutter County |
| Live Oak Creek Mutual Water Company | CA4300829 | CWS | Gilroy | 30 | Santa Clara County |
| Live Oak Springs Water System | CA3700922 | CWS | Spring Valley | 317 | San Diego County |
| Live Oak Waldorf School | CA3100072 | NTNCWS | Meadow Vista | 200 | Placer County |
| Llanas Camp Four Water System | CA1502164 | CWS | Shafter | 54 | Kern County |
| Llano Del Rio Water Company | CA1900849 | CWS | Llano | 545 | Los Angeles County |
| Llano Mutual Water Company | CA1900303 | CWS | Llano | 245 | Los Angeles County |
| Lmr Main Street Partners Llc | CA2800012 | NTNCWS | St. Helena | 26 | Napa County |
| Lnf-Eagle Lake Ranger Station | CA1800569 | NTNCWS | Susanville | 40 | Lassen County |
| Loch Haven Mutual Water Company | CA4900575 | CWS | Santa Rosa | 26 | Sonoma County |
| Loch Lomond Mutual Water Co | CA1700518 | CWS | Cobb | 666 | Lake County |
| Locke Water Works Co [Sws] | CA3400138 | CWS | Walnut Grove | 80 | Sacramento County |
| Lockeford Community Serv. Dist. | CA3910008 | CWS | Lockeford | 3,572 | San Joaquin County |
| Lockeford Mobile Home Park Wtr Sys | CA3900682 | CWS | Concord | 123 | San Joaquin County |
| Lockheed Martin Skunk Works | CA1910238 | NTNCWS | Palmdale | 135 | Los Angeles County |
| Lockheed Martin Space Systems | CA4400801 | NTNCWS | Santa Cruz | 28 | Santa Cruz County |
| Lodi Homes | CA3900837 | CWS | Tracy | 39 | San Joaquin County |
| Lodi Lake Mobile Home Park | CA3900561 | CWS | Woodbridge | 104 | San Joaquin County |
| Lodi Usd-Davis School | CA3901085 | NTNCWS | Lodi | 389 | San Joaquin County |
| Lodi Usd-Houston School | CA3900850 | NTNCWS | Lodi | 405 | San Joaquin County |
| Lodi Usd-Live Oak School | CA3900849 | NTNCWS | Lodi | 375 | San Joaquin County |
| Lodi Usd-Turner Academy | CA3901032 | NTNCWS | Lodi | 32 | San Joaquin County |
| Lodi Usd-Turner Academy At Tokay Colony | CA3900848 | NTNCWS | Lodi | 120 | San Joaquin County |
| Lodi Wine & Business Center | CA3901179 | NTNCWS | Modesto | 61 | San Joaquin County |
| Loleta C.S.D. | CA1210023 | CWS | Loleta | 828 | Humboldt County |
| Loma Mar Mutual | CA4100512 | CWS | Loma Mar | 65 | San Mateo County |
| Loma Prieta Jusd-Loma Prieta School | CA4300721 | NTNCWS | Los Gatos | 542 | Santa Clara County |
| Loma Rica Water Company | CA5800803 | CWS | Bedford | 200 | Yuba County |
| Lomas Del Sol Mws | CA2701918 | CWS | Aromas | 93 | Monterey County |
| London Community Serv Dist | CA5410017 | CWS | Dinuba | 1,800 | Tulare County |
| Lone Pine | 090600138 | CWS | Lone Pine | 535 | Inyo County |
| Lone Pine Mhp | CA5000049 | CWS | Oakdale | 64 | Stanislaus County |
| Lone Pine Mutual Water Company | CA4900653 | CWS | Sebastopol | 65 | Sonoma County |
| Lone Star Dehydrator | CA1000576 | NTNCWS | Sanger | 25 | Fresno County |
| Lone Star School | CA1000190 | NTNCWS | Sanger | 732 | Fresno County |
| Long Barn Property Owners | CA5500057 | CWS | Long Barn | 97 | Tuolumne County |
| Long Canyon Water Company Corp. | CA1500578 | CWS | Bakersfield | 122 | Kern County |
| Long Valley Charter School | CA1800576 | NTNCWS | Doyle | 196 | Lassen County |
| Longview Mennonite School | CA2400122 | NTNCWS | Livingston | 120 | Merced County |
| Lopez Project | CA4010022 | CWS | San Luis Obispo | 69 | San Luis Obispo County |
| Los Alamitos Race Course | CA3000819 | NTNCWS | Los Alamitos | 1,600 | Orange County |
| Los Alamos Community Services District | CA4210002 | CWS | Los Alamos | 1,534 | Santa Barbara County |
| Los Angeles Cwwd 21-Kagel Canyon | CA1910075 | CWS | Alhambra | 736 | Los Angeles County |
| Los Angeles Cwwd 40, Reg. 35-N.E. L.A. | CA1910027 | CWS | Alhambra | 792 | Los Angeles County |
| Los Angeles Cwwd 40, Reg. 39-Rock Creek | CA1910025 | CWS | Alhambra | 1,030 | Los Angeles County |
| Los Angeles Residential Community Founda | CA1900062 | CWS | Santa Clarita | 184 | Los Angeles County |
| Los Angeles World Airports | CA1910138 | NTNCWS | Los Angeles | 180 | Los Angeles County |
| Los Angeles, City Of - Castaic Pwr Plant | CA1910443 | NTNCWS | Los Angeles | 55 | Los Angeles County |
| Los Angeles, City Of - Power Plant #1 | CA1900555 | CWS | Los Angeles | 10 | Los Angeles County |
| Los Angeles, City Of - Power Plant #2 | CA1900542 | CWS | Los Angeles | 28 | Los Angeles County |
| Los Carneros Mwa | CA2701570 | CWS | Aromas | 70 | Monterey County |
| Los Coyotes | 090605147 | CWS | Warner Springs | 114 | San Diego County |
| Los Gatos Tomato Products | CA1000490 | NTNCWS | Huron | 219 | Fresno County |
| Los Madrones Mwc | CA3500578 | CWS | San Juan Bautista | 39 | San Benito County |
| Los Molinos Comm. Services Dist. | CA5210003 | CWS | Los Molinos | 1,450 | Tehama County |
| Los Prietos Boy'S Camp | CA4200630 | NTNCWS | Santa Barbara | 25 | Santa Barbara County |
| Los Prietos Complex | CA4200918 | CWS | Solvang | 845 | Santa Barbara County |
| Los Ranchos De Uvas Water Company | CA4300637 | CWS | Gilroy | 58 | Santa Clara County |
| Los Rios Rancho Water System | CA3600154 | NTNCWS | Yucaipa | 46 | San Bernardino County |
| Los Robles Mobile Home Estates | CA4000649 | CWS | Paso Robles | 420 | San Luis Obispo County |
| Los Tules Mutual Water Company | CA3700958 | CWS | Warner Springs | 260 | San Diego County |
| Lost Hills Utility District | CA1510046 | CWS | Lost Hills | 1,926 | Kern County |
| Lost Lake Resort | 090600227 | CWS | Parker | 355 | Riverside County |
| Lower Lake County Water District | CA1710010 | CWS | Lower Lake | 1,326 | Lake County |
| Lower Rock Creek Mutual Water Co. | CA2600538 | CWS | Bishop | 310 | Mono County |
| Lsid - Tonyville | CA5410007 | CWS | Lindsay | 500 | Tulare County |
| Lsid-Strathmore System | CA5410036 | CWS | Lindsay | 500 | Tulare County |
| Lucerne Valley Elementary School | CA3600432 | NTNCWS | Lucerne Valley | 724 | San Bernardino County |
| Lucerne Valley High School | CA3601095 | NTNCWS | Lucerne Valley | 606 | San Bernardino County |
| Lucerne Valley Mwc | CA3600156 | CWS | Lucerne Valley | 228 | San Bernardino County |
| Lucerne Vista Mwc | CA3600157 | CWS | Lucerne Valley | 224 | San Bernardino County |
| Lukins Brothers Water Company | CA0910007 | CWS | South Lake Tahoe | 3,277 | El Dorado County |
| Lundberg Family Farm | CA0400133 | NTNCWS | Richvale | 240 | Butte County |
| Lundy Mutual Water Company | CA2600532 | CWS | Bishop | 200 | Mono County |
| Lupin Lodge | CA4300716 | CWS | Los Gatos | 300 | Santa Clara County |
| Lynwood Park Mutual Water Co. | CA1910081 | CWS | Compton | 1,564 | Los Angeles County |
| Lytle Creek Administration Site | CA3600478 | NTNCWS | San Bernardino | 100 | San Bernardino County |
| Lytle Springs Wc | CA3600158 | CWS | Lytle Creek | 475 | San Bernardino County |
| Lytton Rancheria Water System | 090600260 | CWS | Windsor | 600 | |
| M & L Cold Storage Water System | CA1503653 | NTNCWS | Delano | 50 | Kern County |
| M & L Office | CA1504005 | NTNCWS | Delano | 35 | Kern County |
| M.F. Mitchell & Company | CA1200579 | NTNCWS | Carlotta | 25 | Humboldt County |
| Mad River Compound - Usfs | CA5305103 | NTNCWS | Bridgeville | 41 | Trinity County |
| Madera Co Cmd19-Parkwood | CA2010004 | CWS | Madera | 1,637 | Madera County |
| Madera Co Csa 22C Gunner Ranch | CA2010019 | CWS | Madera | 3,050 | Madera County |
| Madera Co Md1-Hidden Lake Estates | CA2000544 | CWS | Madera | 162 | Madera County |
| Madera Co Md10A-Madera Ranchos | CA2010008 | CWS | Madera | 3,072 | Madera County |
| Madera Co Sa1-Indian Lakes | CA2010011 | CWS | Madera | 1,562 | Madera County |
| Madera Co Sa16 Sumner Hill | CA2000729 | CWS | Madera | 135 | Madera County |
| Madera Co Sa3-Parksdale | CA2010006 | CWS | Madera | 1,789 | Madera County |
| Madera Community College | CA2000695 | NTNCWS | Fresno | 750 | Madera County |
| Madera Irrigation District | CA2000352 | NTNCWS | Madera | 50 | Madera County |
| Madera Mh & Rv Park | CA2000595 | CWS | Madera | 450 | Madera County |
| Madison Center Water System | CA3301979 | NTNCWS | San Marcos | 63 | Riverside County |
| Madison Elementary School | CA1000105 | NTNCWS | Fresno | 597 | Fresno County |
| Madison Service Dist | CA5700571 | CWS | Madison | 876 | Yolo County |
| Madonna Inn Water Company | CA4000780 | NTNCWS | San Luis Obispo | 120 | San Luis Obispo County |
| Madrona Manor | CA4901330 | NTNCWS | Healdsburg | 34 | Sonoma County |
| Madrone Mutual Water Company | CA4900513 | CWS | Cotati | 76 | Sonoma County |
| Madson Gardens Apartments | CA5400679 | CWS | Tulare | 162 | Tulare County |
| Magic Mountain Mutual Water Company | CA4900637 | CWS | Santa Barbara | 171 | Sonoma County |
| Magnolia Mutual Water | CA3400130 | CWS | Courtland | 90 | Sacramento County |
| Magnolia Union School | CA1300553 | NTNCWS | Brawley | 142 | Imperial County |
| Maher Mutual Water Company | CA1500378 | CWS | Bakersfield | 140 | Kern County |
| Maher Rd Ws #05 | CA2700638 | CWS | Royal Oaks | 48 | Monterey County |
| Main Street Produce | CA4200974 | NTNCWS | Santa Maria | 45 | Santa Barbara County |
| Majestic Pines Community Sd | CA3710041 | CWS | Julian | 1,768 | San Diego County |
| Majestic Townsgate Water System | CA4200718 | NTNCWS | Agoura Hills | 200 | Santa Barbara County |
| Mallo Gold Mine Plaza | CA0300448 | NTNCWS | Pine Grove | 25 | Amador County |
| Mammoth Pool Mobile Home Park | CA2000589 | CWS | Palm Springs | 30 | Madera County |
| Manchester Rancheria | 090600139 | CWS | Point Arena | 100 | Mendocino County |
| Manchester Union Elementary School | CA2300826 | NTNCWS | Manchester | 75 | Mendocino County |
| Manila Community Services Dist. | CA1210017 | CWS | Arcata | 798 | Humboldt County |
| Manning Gardens Care Center Inc | CA1000324 | CWS | Fresno | 170 | Fresno County |
| Manon Manor Mutual Water Company | CA1500535 | CWS | Bakersfield | 200 | Kern County |
| Manteca Industrial Prk Csa-30 | CA3901322 | NTNCWS | Stockton | 76 | San Joaquin County |
| Manzana Products Company, Inc. | CA4901282 | NTNCWS | Sebastopol | 175 | Sonoma County |
| Manzanita Elementary School | CA0400063 | NTNCWS | Gridley | 295 | Butte County |
| Manzanita Hills Wa | CA2700629 | CWS | Royal Oaks | 75 | Monterey County |
| Mapache Trailer Park | CA3900661 | CWS | Concord | 275 | San Joaquin County |
| Marborg Industries | CA4200907 | NTNCWS | Santa Maria | 25 | Santa Barbara County |
| Marchi Central Farm | CA4100551 | CWS | Pescadero | 30 | San Mateo County |
| Marcum Illinois Elementary School | CA5100140 | NTNCWS | East Nicolaus | 185 | Sutter County |
| Maria Lane Mutual Water Company | CA4300752 | CWS | Saratoga | 42 | Santa Clara County |
| Mariana Ranchos Cwd | CA3610030 | CWS | Apple Valley | 1,502 | San Bernardino County |
| Mariani Nut Company - Buckeye Rd | CA5700617 | NTNCWS | Winters | 250 | Yolo County |
| Mariani Packing Company, Inc. | CA4800595 | NTNCWS | Vacaville | 320 | Solano County |
| Marin French Cheese Co | CA2100527 | NTNCWS | Peataluma | 44 | Marin County |
| Marina Landfill Ws | CA2702453 | NTNCWS | Marina | 180 | Monterey County |
| Marina Mobile Manor | CA0707608 | CWS | Fremont | 75 | Contra Costa County |
| Mariposa County Public Works Department | CA2210937 | NTNCWS | Mariposa | 55 | Mariposa County |
| Mariposa Pines Mutual | CA2210906 | CWS | Mariposa | 294 | Mariposa County |
| Mariposa Public Utility Dist | CA2210001 | CWS | Mariposa | 2,000 | Mariposa County |
| Mark West Acres Mwc | CA4900605 | CWS | Santa Rosa | 61 | Sonoma County |
| Mark West Meadows Mutual Water | CA4900905 | CWS | Santa Rosa | 31 | Sonoma County |
| Markleeville Water Co. | CA0202504 | CWS | Markleeville | 175 | Alpine County |
| Marko Zaninovich, Inc. - Pond Road | CA1503374 | NTNCWS | Delano | 100 | Kern County |
| Marquez Rental | CA2000800 | CWS | Firebaugh | 50 | Madera County |
| Martin Marietta Southern Calif Aggregate | CA1900018 | NTNCWS | San Diego | 51 | Los Angeles County |
| Martin'S Mobile Home Court | CA5000061 | CWS | San Ramon | 60 | Stanislaus County |
| Martinez Apartments | CA3900751 | CWS | French Camp | 26 | San Joaquin County |
| Mary Lou Mobile Home Park | CA1000265 | CWS | Stockton | 67 | Fresno County |
| Marygold Mwc | CA3610028 | CWS | Bloomington | 3,155 | San Bernardino County |
| Matanzas Creek Winery | CA4901248 | NTNCWS | Sonoma | 139 | Sonoma County |
| Matsuda'S By Green Acres, Llc | CA3400453 | NTNCWS | Sacramento | 125 | Sacramento County |
| Matsui Nursery Ws | CA2701931 | NTNCWS | Salinas | 165 | Monterey County |
| Mattole Elementary School | CA1200684 | NTNCWS | Petrolia | 50 | Humboldt County |
| Maurland Manor Water System | CA3900543 | CWS | Stockton | 92 | San Joaquin County |
| Maxwell Public Utility District | CA0610003 | CWS | Maxwell | 1,175 | Colusa County |
| Mayacamas Warehouse, Llc | CA4901454 | NTNCWS | Sonoma | 40 | Sonoma County |
| Maywood Mobile Home Park | CA5200556 | CWS | Corning | 140 | Tehama County |
| Maze Blvd Mobilehome Park | CA5000041 | CWS | Tracy | 36 | Stanislaus County |
| Mc Clellan Mhp | CA3400179 | CWS | North Highlands | 700 | Sacramento County |
| Mcalpine Lake & Park | CA3500562 | NTNCWS | San Juan Bautista | 31 | San Benito County |
| Mccabe Union School | CA1300579 | NTNCWS | El Centro | 1,250 | Imperial County |
| Mccahon Floral Ws | CA2702607 | NTNCWS | Royal Oaks | 29 | Monterey County |
| Mccloud C.S.D. | CA4710006 | CWS | Mccloud | 1,317 | Siskiyou County |
| Mcclure Boat Club, Inc. | CA2210905 | CWS | Snelling | 36 | Mariposa County |
| Mccourtney Road Transfer Station | CA2900537 | NTNCWS | Nevada City | 28 | Nevada County |
| Mccoy Rd Ws #05 | CA2701040 | CWS | Salinas | 92 | Monterey County |
| Mcevoy Ranch Water System | CA2100584 | NTNCWS | Petaluma | 41 | Marin County |
| Mchenry Business Park | CA5000411 | NTNCWS | Modesto | 27 | Stanislaus County |
| Mckinney Water District | CA3110022 | CWS | Folsom | 853 | El Dorado County, Placer County |
| Mclaughlin Waste Equipment Inc | CA3901414 | NTNCWS | Galt | 45 | San Joaquin County |
| Mcmahon Road Mutual Water Company | CA3500510 | CWS | Hollister | 102 | San Benito County |
| Mcmanis Family Vineyards Inc. | CA3902215 | NTNCWS | Ripon | 100 | San Joaquin County |
| Mcpr- Woodland Park | CA2204054 | NTNCWS | Mariposa | 35 | Mariposa County |
| Mcswain Elementary School | CA2400079 | NTNCWS | Merced | 1,025 | Merced County |
| Mcusd - Mariposa Junior High School | CA2210909 | NTNCWS | Mariposa | 135 | Mariposa County |
| Mcusd - Sierra Foothill Charter School | CA2210907 | NTNCWS | Mariposa | 151 | Mariposa County |
| Mcusd - Woodland Elementary School | CA2210910 | NTNCWS | Mariposa | 474 | Mariposa County |
| Mcusd -Coulterville-Greeley Hill School | CA2210908 | NTNCWS | Mariposa | 57 | Mariposa County |
| Mcwane Plant And Industrial, Llc | CA5402046 | NTNCWS | Exeter | 105 | Tulare County |
| Md 05 Mountain Ranches | CA2000549 | CWS | Madera | 239 | Madera County |
| Md 07 Marina View Heights | CA2000551 | CWS | Madera | 200 | Madera County |
| Md 08 North Fork Water System | CA2000561 | CWS | Madera | 264 | Madera County |
| Md 24 Teaford Meadow Lakes | CA2000552 | CWS | Madera | 150 | Madera County |
| Md 28 Ripperdan Self Help | CA2000553 | CWS | Madera | 48 | Madera County |
| Md 33 Fairmead | CA2000554 | CWS | Madera | 568 | Madera County |
| Md 36 Eastin Arcola | CA2000727 | CWS | Madera | 84 | Madera County |
| Md 37 La Vina | CA2000728 | CWS | Madera | 350 | Madera County |
| Md 40 Sunset Ridge Estates | CA2000851 | CWS | Madera | 150 | Madera County |
| Md 42 Still Meadow | CA2000737 | CWS | Madera | 100 | Madera County |
| Md 43 Miami Creek Knolls | CA2000557 | CWS | Madera | 100 | Madera County |
| Md 46 Ahwahnee Resorts | CA2000293 | CWS | Madera | 300 | Madera County |
| Md 58 Sierra Highlands | CA2000865 | CWS | Madera | 75 | Madera County |
| Md 60 Dillon Estates | CA2000849 | CWS | Madera | 150 | Madera County |
| Md 63 Meadow Springs Ranch | CA2000757 | CWS | Madera | 300 | Madera County |
| Md 73 Quartz Mountain | CA2000690 | CWS | Madera | 375 | Madera County |
| Md 85 Valeta | CA2000511 | CWS | Madera | 45 | Madera County |
| Md 95 Ranchos West | CA2000692 | CWS | Madera | 150 | Madera County |
| Mdf-Adin Ranger Station | CA2500547 | NTNCWS | Alturas | 50 | Modoc County |
| Meadow Edge Mhp | CA3200138 | CWS | Vinton | 53 | Plumas County |
| Meadow Estates Mutual | CA2300506 | CWS | Boonville | 100 | Mendocino County |
| Meadow Lake Apartments | CA1400511 | CWS | Fillmore | 22 | Inyo County |
| Meadow Lakes Club | CA1000056 | CWS | Fresno | 120 | Fresno County |
| Meadowbrook Oaks | CA0400026 | CWS | Rocklin | 50 | Butte County |
| Meadowcreek Mutual Water Company | CA1400111 | CWS | Bishop | 764 | Inyo County |
| Meadowlark Ranches Mutual Water Company | CA4200612 | CWS | Santa Ynez | 150 | Santa Barbara County |
| Meadowridge Mutual Water Co | CA4400665 | CWS | Freedom | 42 | Santa Cruz County |
| Meadows Of The Kern Mutual Water Company | CA1502645 | CWS | Bakersfield | 32 | Kern County |
| Mecca Arco Travel Center | CA3303092 | NTNCWS | Indio | 1,847 | Riverside County |
| Mecchi Water Company | CA4300912 | CWS | Lodi | 104 | Santa Clara County |
| Mel Mar Mutual Water Co | CA4500003 | CWS | Palo Cedro | 300 | Shasta County |
| Melita Heights Mutual Water Company | CA4900551 | CWS | Santa Rosa | 64 | Sonoma County |
| Melody Woods Water Company | CA4300525 | CWS | Los Gatos | 168 | Santa Clara County |
| Mendo Mill And Lumber Company | CA1700739 | NTNCWS | Ukiah | 45 | Lake County |
| Mendocino Hotel | CA2300628 | NTNCWS | Mendocino | 50 | Mendocino County |
| Mendocino Presbyterian Church | CA2301010 | NTNCWS | Mendocino | 30 | Mendocino County |
| Mendocino School District- Mendocino | CA2300584 | NTNCWS | Mendocino | 579 | Mendocino County |
| Mendocino School District-Albion School | CA2300846 | NTNCWS | Mendocino | 25 | Mendocino County |
| Merced Adventist Church Water Sys. | CA2400148 | NTNCWS | Merced | 152 | Merced County |
| Merced New Life School | CA2400219 | NTNCWS | Merced | 37 | Merced County |
| Meridian Elementary School | CA5100141 | NTNCWS | Meridian | 100 | Sutter County |
| Meridian Rd Ws #09 | CA2701837 | NTNCWS | San Ramon | 37 | Monterey County |
| Merquin Elementary School | CA2400064 | NTNCWS | Hilmar | 284 | Merced County |
| Merrill Gardens Iris Canyon Ws | CA2702816 | CWS | Monterey | 136 | Monterey County |
| Merry Mountain Mutual | CA0400013 | CWS | Clipper Mills | 90 | Butte County |
| Mesa Del Toro Mwc | CA2701503 | CWS | Salinas | 90 | Monterey County |
| Mesa Dunes Mobile Home Estates | CA4000650 | CWS | Arroyo Grande | 600 | San Luis Obispo County |
| Mesa Elementary School | CA5000584 | NTNCWS | Riverbank | 860 | Stanislaus County |
| Mesa Grande (Tract 2) | 090605011 | CWS | Santa Ysabel | 43 | Riverside County |
| Mesa Grande - Black Canyon | 090605132 | CWS | Santa Ysabel | 81 | San Diego County |
| Mesa Hills Mutual Water Company | CA4200862 | CWS | Solvang | 34 | Santa Barbara County |
| Mescal Creek Water, Inc | CA1900147 | CWS | Llano | 80 | Los Angeles County |
| Mesquite Mines Inc. | CA1300643 | NTNCWS | Brawley | 300 | Imperial County |
| Metro Air Park Water System | CA3400473 | NTNCWS | Sacramento | 2,500 | Sacramento County |
| Metropolitan Water Dist. Of So. Cal. | CA1910087 | CWS | La Verne | 0 | Los Angeles County |
| Mettler County Water District | CA1500401 | CWS | Bakersfield | 90 | Kern County |
| Mettler Valley Mutual | CA1900100 | CWS | Lancaster | 160 | Los Angeles County |
| Meyers Water Co. | CA2800530 | CWS | Napa | 250 | Napa County |
| Mhc Tt Inc. (Dba Pio Pico) | CA3702104 | CWS | Tampa | 23 | San Diego County |
| Mi Wuk Heights Mwc | CA5500060 | CWS | Mi Wuk Village | 445 | Tuolumne County |
| Mi Wuk Village Mut Wtr Co | CA5510006 | CWS | Mi Wuk Village | 1,076 | Tuolumne County |
| Michael Lucas Water System | CA4901365 | NTNCWS | Santa Rosa | 25 | Sonoma County |
| Michele Mutual Water Company | CA4900552 | CWS | Fulton | 93 | Sonoma County |
| Mid Valley Nut Co | CA5000600 | NTNCWS | Hughson | 60 | Stanislaus County |
| Middle Road Mutual Water Co | CA5601110 | CWS | Santa Paula | 134 | Ventura County |
| Middletown Rancheria Community Water System | 090600141 | CWS | Middletown | 487 | |
| Midland School | CA4200618 | CWS | Los Olivos | 100 | Santa Barbara County |
| Midway City Mutual Wc | CA3010097 | CWS | Westminster | 1,305 | Orange County |
| Midway Heights C. W. D. | CA3110041 | CWS | Meadow Vista | 1,491 | Placer County |
| Midway Mobilehome Park | CA4500082 | CWS | Ojai | 50 | Shasta County |
| Mil Potrero Mwc | CA1510028 | CWS | Pine Mountain Club | 2,200 | Kern County |
| Milk Specialties Global | CA5402050 | NTNCWS | Visalia | 95 | Tulare County |
| Mill Creek M.W.C. | CA1200547 | CWS | Fortuna | 85 | Humboldt County |
| Mill Creek Msc | CA3600166 | CWS | Mentone | 315 | San Bernardino County |
| Millennium Pacific Greenhouses | CA1503686 | NTNCWS | Tehachapi | 25 | Kern County |
| Millers Hill School | CA0900210 | NTNCWS | Shingle Springs | 120 | El Dorado County |
| Millville Elementary School | CA4500180 | NTNCWS | Millville | 240 | Shasta County |
| Milton Road Water Company | CA2801080 | CWS | Napa | 39 | Napa County |
| Minarets High School | CA2000947 | NTNCWS | Oneals | 325 | Madera County |
| Miner Family Winery | CA2803907 | NTNCWS | St. Helena | 25 | Napa County |
| Mineral County Water District | CA5200503 | CWS | Mineral | 634 | Tehama County |
| Mineral Mountain Mutual Water | CA0500019 | CWS | Muphys | 67 | Calaveras County |
| Minturn Nut Co., Inc. | CA2400223 | NTNCWS | Le Grand | 130 | Merced County |
| Mira Loma High Desert Hospital | CA1900929 | NTNCWS | Castaic | 500 | Los Angeles County |
| Mira Monte Water Co. | CA5200560 | CWS | Gerber | 145 | Tehama County |
| Miranda C.S.D. | CA1200707 | CWS | Miranda | 492 | Humboldt County |
| Mirasol Company Water System | CA1500152 | CWS | Buttonwillow | 26 | Kern County |
| Mireval Improvement Association | CA4300741 | CWS | Los Gatos | 60 | Santa Clara County |
| Misionero Vegetables Ws | CA2701946 | NTNCWS | Gonzales | 61 | Monterey County |
| Mission Farm R.V. Park | CA3500556 | CWS | San Juan Bautista | 110 | San Benito County |
| Mission Highlands Mutual Water Co. | CA4900563 | CWS | Sonoma | 150 | Sonoma County |
| Mission Oaks Mobile Home Park | CA3510006 | CWS | San Jose | 550 | San Benito County |
| Mission School Ws | CA2702317 | NTNCWS | Soledad | 100 | Monterey County |
| Mission Springs Conference Center | CA4400723 | CWS | Scotts Valley | 1,310 | Santa Cruz County |
| Mitchell'S Avenue E Mobile Home Park | CA1900785 | CWS | Lancaster | 27 | Los Angeles County |
| Mitchells Camp Family Assoc. | CA1300555 | CWS | Palo Verde | 125 | Imperial County |
| Mitomkai Tribal Water System | 090605120 | CWS | Willits | 300 | Mendocino County |
| Mitsubishi Cement Plant Cushenbury | CA3600141 | NTNCWS | Lucerne Valley | 160 | San Bernardino County |
| Mjusd Browns Valley School | CA5800844 | NTNCWS | Marysville | 155 | Yuba County |
| Mjusd Cordua School | CA5800840 | NTNCWS | Marysville | 110 | Yuba County |
| Mjusd Dobbins School | CA5800845 | NTNCWS | Marysville | 85 | Yuba County |
| Mjusd Foothill Intermediate School | CA5800843 | NTNCWS | Marysville | 325 | Yuba County |
| Mjusd Loma Rica School | CA5800847 | NTNCWS | Marysville | 150 | Yuba County |
| Mobile Home Estates | CA4900720 | CWS | Santa Rosa | 403 | Sonoma County |
| Mobile Villas Trailer Park | CA3901081 | CWS | Stockton | 130 | San Joaquin County |
| Modern Village Mwc | CA5200545 | CWS | Red Bluff | 85 | Tehama County |
| Modesto Irrigation District | CA5010038 | CWS | Modesto | 0 | Stanislaus County |
| Modoc Vineyard Academy | CA2500513 | NTNCWS | Alturas | 53 | Modoc County |
| Mojave Solar Project Alpha Power Plant | CA3601184 | NTNCWS | Hinkley | 86 | San Bernardino County |
| Mojave Solar Project Beta Power Plant | CA3601185 | NTNCWS | Hinkley | 86 | San Bernardino County |
| Mojave Water Agency | CA3610129 | CWS | Apple Valley | 0 | San Bernardino County |
| Mokelumne Mobile Senior Park | CA3900719 | CWS | Galt | 55 | San Joaquin County |
| Monarch Nut Company | CA5403140 | NTNCWS | Delano | 400 | Tulare County |
| Mondavi Farm Worker Center | CA2800040 | CWS | Napa | 66 | Napa County |
| Mono Vista Ranch Mhp | CA5500124 | CWS | Rancho Cucamonga | 105 | Tuolumne County |
| Monroe School | CA1000192 | NTNCWS | Caruthers | 200 | Fresno County |
| Monrovia Nursery | CA5403032 | NTNCWS | Dayton | 385 | Tulare County |
| Monrovia Nursery - Venice Hills | CA5403127 | NTNCWS | Dayton | 25 | Tulare County |
| Montague, City Of | CA4710007 | CWS | Montague | 1,264 | Siskiyou County |
| Montano Ranch | 090600038 | CWS | Thermal | 72 | |
| Monte Sereno Mutual Benefit Water | CA4000808 | CWS | San Luis Obispo | 65 | San Luis Obispo County |
| Monte Shasta M.W.C. | CA4700872 | CWS | Mt. Shasta | 150 | Siskiyou County |
| Monte Vista Christian School | CA4400754 | CWS | Watsonville | 25 | Santa Cruz County |
| Monte Vista Farming | CA5000603 | NTNCWS | Denair | 188 | Stanislaus County |
| Montecito Sea Meadows | CA4200733 | CWS | Santa Barbara | 100 | Santa Barbara County |
| Monterey Bay Academy | CA4400755 | CWS | La Selva Beach | 400 | Santa Cruz County |
| Monterey Bay Nursery Ws | CA2702336 | NTNCWS | Watsonville | 31 | Monterey County |
| Monterey Dunes Mwa | CA2701452 | CWS | Moss Landing | 32 | Monterey County |
| Monterey Mushrooms | CA4300941 | NTNCWS | Morgan Hill | 361 | Santa Clara County |
| Monterey Mushrooms - Hall Rd | CA2701876 | NTNCWS | Royal Oaks | 25 | Monterey County |
| Monterey Mushrooms - Maher Crt | CA2701940 | NTNCWS | Royal Oaks | 49 | Monterey County |
| Monterey One Water | CA2702456 | NTNCWS | Monterey | 93 | Monterey County |
| Monterey Park Tract Csd | CA5000389 | CWS | Ceres | 186 | Stanislaus County |
| Montessori Del Mar Learning Center | CA2300874 | NTNCWS | Fort Bragg | 50 | Mendocino County |
| Montgomery Creek School | CA4500170 | NTNCWS | Montgomery Creek | 95 | Shasta County |
| Moon Valley Water System | CA4900871 | CWS | Sonoma | 691 | Sonoma County |
| Moonstone Heights Mwa | CA1200590 | CWS | Trinidad | 33 | Humboldt County |
| Moore Learning (Formerly Sheldon Acres) | CA3400402 | NTNCWS | Elk Grove | 55 | Sacramento County |
| Mora Mhp | 090600025 | CWS | Whittier | 25 | |
| Morada Acres Water System | CA3900512 | CWS | Stockton | 105 | San Joaquin County |
| Morada Estates N Pws #46 | CA3901337 | CWS | Stockton | 426 | San Joaquin County |
| Morada Estates Pws | CA3900722 | CWS | Stockton | 290 | San Joaquin County |
| Morada Manor Water System | CA3900523 | CWS | Stockton | 112 | San Joaquin County |
| Morada Produce | CA3901425 | NTNCWS | Linden | 100 | San Joaquin County |
| Moraga Heights Mutual Water | CA0707585 | CWS | Canyon | 66 | Contra Costa County |
| Morehead Park | CA3900805 | CWS | Greenbrae | 300 | San Joaquin County |
| Moreton Bay Professional Plaza | CA4200634 | NTNCWS | Goleta | 25 | Santa Barbara County |
| Morgan Hill Usd-Machado School | CA4300593 | NTNCWS | Morgan Hill | 60 | Santa Clara County |
| Morning Star King, Llc | CA1600249 | NTNCWS | Los Banos | 80 | Kings County |
| Morning Star Pkg. Co.-Wms. | CA0605002 | NTNCWS | Los Banos | 30 | Colusa County |
| Morningside Mobilehome Park | CA5000054 | CWS | Modesto | 67 | Stanislaus County |
| Moro Cojo Mwa | CA2700656 | CWS | Prunedale | 67 | Monterey County |
| Moro Rd Ws #09 | CA2701926 | CWS | Salinas | 210 | Monterey County |
| Morongo Golf Course At Tukwet Cnyn | CA3303071 | NTNCWS | Banning | 185 | Riverside County |
| Morro Rock Mutual Water Co | CA4010015 | CWS | Cayucos | 2,181 | San Luis Obispo County |
| Moss Landing Mwc | CA2701683 | NTNCWS | Moss Landing | 200 | Monterey County |
| Moss Mobile Manor | CA3600397 | CWS | Lucerne Valley | 26 | San Bernardino County |
| Mount Laguna Improvement Assn. | CA3702283 | NTNCWS | Mt Laguna | 580 | San Diego County |
| Mount Madonna Center | CA4400764 | CWS | Watsonville | 50 | Santa Cruz County |
| Mount Toro Ranchos Mwa | CA2701935 | CWS | Salinas | 35 | Monterey County |
| Mountain Center Cafe | CA3301145 | CWS | Idyllwild | 77 | Riverside County |
| Mountain Creek School | CA0900309 | NTNCWS | Somerset | 106 | El Dorado County |
| Mountain Elementary School | CA4400756 | NTNCWS | Soquel | 240 | Santa Cruz County |
| Mountain Empire High School | CA3700117 | NTNCWS | Pine Valley | 1,000 | San Diego County |
| Mountain Gate C.S.D. | CA4510002 | CWS | Redding | 2,227 | Shasta County |
| Mountain House School | CA0105009 | NTNCWS | Byron | 50 | Alameda County |
| Mountain Meadows Mwc | CA2600620 | CWS | Mammoth Lakes | 525 | Mono County |
| Mountain Mesa Wc | CA1510042 | CWS | Bakersfield | 777 | Kern County |
| Mountain Of Attention Water | CA1700527 | CWS | Middletown | 26 | Lake County |
| Mountain Springs Mutual Water Company | CA4300740 | CWS | Los Gatos | 40 | Santa Clara County |
| Mountain Valley Apts & Rvp | CA5200571 | CWS | Red Bluff | 131 | Tehama County |
| Mountain Valley Child And Family Service | CA2900587 | NTNCWS | Nevada City | 50 | Nevada County |
| Mountain View Cold Storage | CA5403152 | NTNCWS | Reedley | 65 | Tulare County |
| Mountain View Continuation School | CA3601057 | NTNCWS | Lucerne Valley | 25 | San Bernardino County |
| Mountain View Duplexes | CA5400604 | CWS | Kingsburg | 103 | Tulare County |
| Mountain View Elementary School | CA5000255 | NTNCWS | Denair | 170 | Stanislaus County |
| Mountain View Mhp | CA5400819 | CWS | Visalia | 44 | Tulare County |
| Mountain View Mobile Estates, Llc | CA4900798 | CWS | Newport Beach | 250 | Sonoma County |
| Mountain Village Homeowner'S Assoc | CA0400090 | CWS | Forest Ranch | 45 | Butte County |
| Mp Associates, Inc. | CA0300524 | NTNCWS | Ione | 150 | Amador County |
| Mp Mine Operations Llc | CA3600172 | CWS | Mountain Pass | 655 | San Bernardino County |
| Mpwd-Coulterville Csa 1 | CA2210901 | CWS | Mariposa | 193 | Mariposa County |
| Mt Ararat Mobile Home Park | CA1000257 | CWS | Oak View | 42 | Fresno County |
| Mt Baldy Homeowners Assn. | CA3610033 | CWS | Mt. Baldy | 350 | San Bernardino County |
| Mt. Eden Mutual Water Company | CA4300831 | CWS | Saratoga | 165 | Santa Clara County |
| Mt. Hermon Association, Inc. | CA4410008 | CWS | Mount Hermon | 1,176 | Santa Cruz County |
| Mt. Pleasant Water Users Association | CA4300563 | CWS | San Jose | 300 | Santa Clara County |
| Muir Beach Community | CA2100508 | CWS | Muir Beach | 336 | Marin County |
| Mulberry Mhp | CA5000072 | CWS | Stockton | 148 | Stanislaus County |
| Mulberry Union School | CA1300556 | NTNCWS | Brawley | 85 | Imperial County |
| Muller Mutual Water Company | CA5500064 | CWS | Tuolumne | 154 | Tuolumne County |
| Mumm Of Napa Valley | CA2801024 | NTNCWS | Sonoma | 50 | Napa County |
| Muriel Wright Residential Center | CA4300929 | CWS | San Jose | 52 | Santa Clara County |
| Murphy Hill Ws #01 | CA2700662 | CWS | Aromas | 65 | Monterey County |
| Murphy Hill Ws #02 | CA2700663 | CWS | Aromas | 66 | Monterey County |
| Murrieta Palms Mobile Home Park | CA3301169 | CWS | Hemet | 237 | Riverside County |
| Murrieta/Hernandez Farms | CA1000585 | CWS | Kerman | 25 | Fresno County |
| Musco Family Olive Co | CA3901429 | NTNCWS | Tracy | 348 | San Joaquin County |
| Musd-New Haven School | CA3901163 | NTNCWS | Manteca | 626 | San Joaquin County |
| Musick Meadows 1 | CA1000060 | NTNCWS | Madera | 13 | Fresno County |
| Musick Meadows 2 | CA1000061 | NTNCWS | Shaver Lake | 121 | Fresno County |
| Mustang Mutual Water System | CA1500555 | CWS | Bakersfield | 200 | Kern County |
| Mustang Springs Mutual Water | CA4000775 | CWS | Paso Robles | 30 | San Luis Obispo County |
| Mwd - Eagle Mountain | CA3301226 | CWS | La Verne | 15 | Riverside County |
| Mwd Of So Cal Gene Plant | CA3600383 | CWS | La Verne | 29 | San Bernardino County |
| Mwd Of So Cal Iron Mountain | CA3600382 | CWS | La Verne | 23 | San Bernardino County |
| Mycopia Llc | CA4901475 | NTNCWS | Sebastopol | 70 | Sonoma County |
| Myers Flat M.W.S. Inc. | CA1200538 | CWS | Myers Flat | 330 | Humboldt County |
| Nacimiento Water Company | CA4010027 | CWS | Bradley | 2,191 | San Luis Obispo County |
| Nacimiento Water Project | CA4010080 | CWS | San Luis Obispo | 0 | San Luis Obispo County |
| Naf El Centro | CA1310700 | CWS | El Centro | 360 | Imperial County |
| Napa County Schools: Pope Valley | CA2800840 | NTNCWS | Pope Valley | 100 | Napa County |
| Napa River Ranch | CA2800531 | CWS | Napa | 70 | Napa County |
| Napa Valley Country Club | CA2800588 | NTNCWS | Napa | 400 | Napa County |
| Naples | CA4200721 | CWS | Goleta | 66 | Santa Barbara County |
| National Cement Co.-Lebec Plant | CA1502595 | NTNCWS | Encino | 120 | Kern County |
| Natividad Rd Ws #02 | CA2701922 | NTNCWS | Salinas | 35 | Monterey County |
| Navajo Mwc | CA3600180 | CWS | Apple Valley | 264 | San Bernardino County |
| Naval Base Ventura County, Point Mugu | CA5610700 | CWS | Point Mugu | 1,700 | Ventura County |
| Naval Base Ventura County, Port Hueneme | CA5610701 | CWS | Point Mugu | 3,500 | Ventura County |
| Naval Medical Center San Diego | CA3710710 | CWS | 2,981 | San Diego County | |
| Navalair Mobile Home Park | CA5602110 | CWS | Oxnard | 160 | Ventura County |
| Navelencia School | CA1000193 | NTNCWS | Reedley | 329 | Fresno County |
| Ncsos, Mccourtney Rd. | CA2900601 | NTNCWS | Grass Valley | 25 | Nevada County |
| Neil'S Service Center | CA4800801 | NTNCWS | Vacaville | 170 | Solano County |
| Nelson Industrial Park | CA2900618 | NTNCWS | Auburn | 32 | Nevada County |
| Nepenthe Ws | CA2701280 | CWS | Big Sur | 618 | Monterey County |
| Netto Ag Inc. | CA1600609 | NTNCWS | Hanford | 50 | Kings County |
| Nevada Id - Smartsville | CA5810005 | CWS | Grass Valley | 122 | Yuba County |
| New Auberry Water Association | CA1000063 | CWS | Auberry | 120 | Fresno County |
| New Avenue Mutual Water Company | CA4300771 | CWS | Gilroy | 305 | Santa Clara County |
| New Camaldoli Hermitage Ws | CA2702268 | CWS | Big Sur | 33 | Monterey County |
| New Hope Landing General Store | CA3900664 | CWS | Sacramento | 125 | San Joaquin County |
| New Horizons Mobile/Rv Park | CA1000259 | CWS | Redmond | 70 | Fresno County |
| New Jerusalem School | CA3900993 | NTNCWS | Tracy | 210 | San Joaquin County |
| New Legend Logistics | CA1503666 | NTNCWS | Yuba City | 33 | Kern County |
| New Meadows | CA5200546 | CWS | Palos Verdes Estates | 70 | Tehama County |
| Newberry Elementary School | CA3600790 | NTNCWS | Yermo | 255 | San Bernardino County |
| Newby Island Landfill, Republic Services | CA4300964 | NTNCWS | Milpitas | 65 | Santa Clara County |
| Newell County Water District | CA2500801 | CWS | Tulelake | 629 | Modoc County |
| Nicasio School | CA2100582 | NTNCWS | Nicasio | 47 | Marin County |
| Nicasio Valley Ranch Mutual | CA2100579 | CWS | Nicasio | 36 | Marin County |
| Nice Mutual Water Company | CA1710008 | CWS | Nice | 2,929 | Lake County |
| Nichols Farms | CA1600602 | NTNCWS | Hanford | 375 | Kings County |
| Nickel & Nickel Winery | CA2800027 | NTNCWS | St. Helena | 40 | Napa County |
| Nishi Quality Flowers, Inc. | CA5603116 | NTNCWS | Ventura | 92 | Ventura County |
| Nmip Fire & Water System, Llc | CA5000189 | NTNCWS | Modesto | 300 | Stanislaus County |
| Noel Heights-Cal Water Service (Puc) | CA4900785 | CWS | San Jose | 86 | Sonoma County |
| Noll Properties | CA4000734 | NTNCWS | San Luis Obispo | 100 | San Luis Obispo County |
| Nomlaki Tribal Community Complex | 090600070 | NTNCWS | Corning | 45 | |
| Norcal Water Works | CA5200657 | CWS | Sacramento | 45 | Tehama County |
| Nord Country School | CA0400073 | NTNCWS | Chico | 230 | Butte County |
| Nord Road Water Association | CA1502383 | CWS | Bakersfield | 32 | Kern County |
| Normans Nursery | CA3901345 | NTNCWS | Linden | 200 | San Joaquin County |
| Norris Canyon Property Owners Assn | CA0103040 | CWS | Castro Valley | 50 | Alameda County |
| North Edwards Wd | CA1510052 | CWS | North Edwards | 1,105 | Kern County |
| North Fork Community Development Council | CA2000953 | NTNCWS | North Fork | 25 | Madera County |
| North Fork Elementary School | CA2000612 | NTNCWS | Oneals | 350 | Madera County |
| North Fork Mono Casino Water System | 090600170 | NTNCWS | Madera | 7,780 | |
| North Gualala Water Company | CA2310007 | CWS | Gualala | 3,508 | Mendocino County |
| North Kaweah Mutual Water Company | CA5400506 | CWS | Three Rivers | 560 | Tulare County |
| North Kranenburg Ws | CA1503669 | CWS | Bakersfield | 27 | Kern County |
| North Lone Pine Mutual Water Company | CA1400072 | CWS | Lone Pine | 70 | Inyo County |
| North Marin Wd - Pt. Reyes | CA2110006 | CWS | Novato | 1,841 | Marin County |
| North Muroc Mutual Water Company | CA1500290 | CWS | North Edwards | 270 | Kern County |
| North Oaks Mutual Water Co | CA5000237 | CWS | Oakdale | 234 | Stanislaus County |
| North Peak Mutual Water Company | CA3701747 | CWS | Julian | 294 | San Diego County |
| North Shore Estates Ws | CA2702256 | CWS | Bradley | 60 | Monterey County |
| North Shore Mwc | CA3600184 | CWS | Fawnskin | 7 | San Bernardino County |
| North Star Mobile Home Park | CA4900797 | CWS | Santa Rosa | 221 | Sonoma County |
| North Tahoe Pud - Carnelian Woods | CA3110023 | CWS | Tahoe Vista | 524 | Placer County |
| North Tahoe Pud - Dollar Cove | CA3110036 | CWS | Tahoe Vista | 507 | Placer County |
| North Trails Mutual Water Company | CA1907014 | CWS | Agua Dulce | 100 | Los Angeles County |
| North Valley School Pws | CA3901090 | NTNCWS | Chico | 35 | San Joaquin County |
| North Valley Services | CA5200525 | NTNCWS | Red Bluff | 28 | Tehama County |
| North Yuba Water District | CA5810006 | CWS | Brownsville | 2,772 | Yuba County |
| Northbay Logistics Center Fka Savemart | CA4810019 | NTNCWS | San Rafael Ave | 180 | Solano County |
| Northcrest Mobile Home Park | CA0800552 | CWS | San Diego | 250 | Del Norte County |
| Northgate 880 [Sws] | CA3400173 | NTNCWS | Sacramento | 2,926 | Sacramento County |
| Northstar At Tahoe Comstock Water System | CA3107322 | NTNCWS | Truckee | 25 | Placer County |
| Northstar Csd - Martis Valley | CA3110051 | CWS | Truckee | 4,432 | Placer County |
| Northwest Pipe Company | CA3901181 | NTNCWS | Tracy | 82 | San Joaquin County |
| Northwest Prep Charter School | CA4900695 | NTNCWS | Santa Rosa | 325 | Sonoma County |
| Nps - Death Valley, Cow Creek/Nevares | CA1410503 | CWS | Death Valley | 88 | Inyo County |
| Nps - Death Valley, Furnace Creek | CA1410505 | CWS | Death Valley | 150 | Inyo County |
| Nps - Death Valley, Stovepipe Wells | CA1410502 | CWS | Death Valley | 25 | Inyo County |
| Nps-Ash Mountain | CA5410513 | CWS | Three Rivers | 2,930 | Tulare County |
| Nps-Grant Grove | CA1010501 | CWS | Three Rivers | 2,950 | Fresno County, Tulare County |
| Nps-Wolverton | CA5410503 | CWS | Three Rivers | 165 | Tulare County |
| Nuestro School | CA5100142 | NTNCWS | Live Oak | 120 | Sutter County |
| Nvusd: Stonebridge School | CA2800848 | NTNCWS | Napa | 266 | Napa County |
| Nyack Water System | CA3103291 | NTNCWS | Emigrant Gap | 50 | Placer County |
| Nyeland Acres Mutual Water Co | CA5602111 | CWS | Oxnard | 975 | Ventura County |
| O Me-Nook Maintenance And Operation | CA0800649 | NTNCWS | Crescent City | 120 | Del Norte County |
| O'Connor Hospital | CA4300808 | NTNCWS | San Jose | 2,500 | Santa Clara County |
| O'Connor Tract Co-Operative Water Co. | CA4110019 | CWS | Palo Alto | 2,789 | San Mateo County |
| O'Neill Vintners & Distillers | CA1000411 | NTNCWS | Parlier | 90 | Fresno County |
| O-G Packing Co | CA3901382 | NTNCWS | Stockton | 25 | San Joaquin County |
| Oak Creek Investment Water System | CA1503645 | NTNCWS | Mojave | 50 | Kern County |
| Oak Creek Mobile Home Park | CA2000775 | CWS | Coarsegold | 370 | Madera County |
| Oak Dell Park | CA4300603 | CWS | Saratoga | 104 | Santa Clara County |
| Oak Glen Domestic Water | CA3600185 | CWS | Hemet | 130 | San Bernardino County |
| Oak Glen Retreat | CA3600133 | CWS | Yorba Linda | 65 | San Bernardino County |
| Oak Grove Mobile Home Park | CA1900537 | CWS | Bell Canyon | 109 | Los Angeles County |
| Oak Grove School | CA4900703 | NTNCWS | Santa Rosa | 500 | Sonoma County |
| Oak Haven Association | CA3301528 | CWS | Temecula | 120 | Riverside County |
| Oak Heights W & R Co Inc | CA2700665 | CWS | Salinas | 105 | Monterey County |
| Oak Knolls Mutual Water Company | CA1500465 | CWS | Lake Isabella | 123 | Kern County |
| Oak Manor Ws | CA2700509 | CWS | Salinas | 92 | Monterey County |
| Oak Ridge Winery, Llc | CA3901197 | NTNCWS | Lodi | 70 | San Joaquin County |
| Oak Run Elementary School | CA4500190 | NTNCWS | Oak Run | 125 | Shasta County |
| Oak Trail Estates | CA4200881 | CWS | Santa Ynez | 211 | Santa Barbara County |
| Oak Trail Ranch | CA4200802 | CWS | Santa Ynez | 102 | Santa Barbara County |
| Oak Valley School | CA5400713 | NTNCWS | Tulare | 645 | Tulare County |
| Oak View Union Elementary Sch | CA3900846 | NTNCWS | Acampo | 350 | San Joaquin County |
| Oakhurst Mobile Home Estates | CA2000593 | CWS | Yorba Linda | 138 | Madera County |
| Oaklane Mobile Village, Llc. | CA0900404 | CWS | Roseville | 75 | El Dorado County |
| Oakley Mutual Water Company | CA0706004 | CWS | Oakley | 170 | Contra Costa County |
| Oakmont Water System | CA4300526 | CWS | Stockton | 61 | Santa Clara County |
| Oakvale Park | CA3700962 | CWS | Escondido | 260 | San Diego County |
| Oakville Grocery Co. | CA2800556 | NTNCWS | Sonoma | 25 | Napa County |
| Oakwood Lake Water District-Subdivision | CA3910023 | CWS | Stockton | 1,640 | San Joaquin County |
| Oasis Date Gardens | CA3301373 | NTNCWS | Thermal | 832 | Riverside County |
| Oasis Investments | CA5000263 | CWS | Turlock | 75 | Stanislaus County |
| Oasis Mobile Home Park | 090605129 | CWS | Thermal | 826 | Riverside County |
| Oasis Property Owners Association | CA1500585 | CWS | Bakersfield | 100 | Kern County |
| Occidental Arts & Ecology Center | CA4901141 | NTNCWS | Occidental | 51 | Sonoma County |
| Occidental Community Services District | CA4900536 | CWS | Occidental | 383 | Sonoma County |
| Ocean'S Edge Estates | CA2300634 | CWS | Fort Bragg | 250 | Mendocino County |
| Ocotillo Mutual Water Co | CA1300513 | CWS | Ocotillo | 150 | Imperial County |
| Ocotillo Oasis, Llc | CA3700291 | CWS | San Marcos | 96 | San Diego County |
| Odd Fellows Recreation Club | CA4910026 | CWS | Guerneville | 557 | Sonoma County |
| Odiyan Buddhist Retreat Center | CA4901314 | CWS | Cazadero | 35 | Sonoma County |
| Oid #22 - Williams Tract | CA5000015 | CWS | Oakdale | 150 | Stanislaus County |
| Oid #45 | CA5000013 | CWS | Oakdale | 144 | Stanislaus County |
| Oid #46 - Sunset Oaks | CA5000014 | CWS | Oakdale | 269 | Stanislaus County |
| Oid #51 - Sunset Oaks #10 | CA5000317 | CWS | Oakdale | 287 | Stanislaus County |
| Oid-Oakdale Rural Water System #1 | CA5000433 | CWS | Oakdale | 1,570 | Stanislaus County |
| Okieville Highland Acres Mwc | CA5403217 | CWS | Tulare | 300 | Tulare County |
| Oku Incorporated | CA4100540 | CWS | Pescadero | 35 | San Mateo County |
| Old Campo | 090600057 | CWS | Campo | 102 | San Diego County |
| Old River Mutual Water Company | CA1500096 | CWS | Clovis | 130 | Kern County |
| Old Stage Rd Ws #21 | CA2702708 | NTNCWS | Salinas | 25 | Monterey County |
| Old Sugar Mill Winery | CA5700508 | NTNCWS | Woodland | 25 | Yolo County |
| Olivares Farms Water System | CA2400335 | NTNCWS | Delhi | 28 | Merced County |
| Olivarez Honey Bees | CA1105005 | NTNCWS | Orland | 128 | Glenn County |
| Olive Crest | CA4200639 | NTNCWS | Santa Barbara | 25 | Santa Barbara County |
| Olive Dell Ranch | CA3600187 | CWS | Colton | 45 | Riverside County, San Bernardino County |
| Olive Lane Mobilehome Park | CA5000055 | CWS | Acampo | 153 | Stanislaus County |
| Olivet Elementary School | CA4900699 | NTNCWS | Santa Rosa | 400 | Sonoma County |
| Olivet University | CA3301863 | CWS | Anza | 212 | Riverside County |
| Olympic Valley Mwc | CA3110019 | CWS | Reno | 151 | Placer County |
| Olympic Valley Psd | CA3110020 | CWS | Olympic Valley | 1,165 | Placer County |
| Om Scott & Sons/Hyponex Corp | CA3901368 | NTNCWS | Linden | 50 | San Joaquin County |
| Omya California, A Division Of Omya Inc | CA3601064 | NTNCWS | Lucerne Valley | 100 | San Bernardino County |
| Onitsuka Brothers Ws | CA2700156 | NTNCWS | Salinas | 50 | Monterey County |
| Op Murphy & Sons Ws | CA2702830 | NTNCWS | Soledad | 25 | Monterey County |
| Opal Fry And Son | CA1500216 | NTNCWS | Bakersfield | 33 | Kern County |
| Open Sky Ranch | CA1000643 | NTNCWS | Kingsburg | 40 | Fresno County |
| Ophir Elementary School Water System | CA3100083 | NTNCWS | Loomis | 260 | Placer County |
| Opus One Winery | CA2801026 | NTNCWS | Oakville | 100 | Napa County |
| Orchard Ln Ws #02 | CA2700669 | CWS | Salinas | 32 | Monterey County |
| Orchard School | CA4400914 | NTNCWS | Aptos | 65 | Santa Cruz County |
| Orick C.S.D. | CA1200701 | CWS | Orick | 328 | Humboldt County |
| Original Sherwood Valley Rancheria | 090605021 | CWS | Willits | 60 | Mendocino County |
| Orland Estates Mobile H.P. | CA1100444 | CWS | Billings | 207 | Glenn County |
| Orland Mobile H.P. | CA1100445 | CWS | El Dorado Hills | 178 | Glenn County |
| Orleans C.S.D. | CA1200729 | CWS | Orleans | 636 | Humboldt County |
| Orleans Mutual Water Company | CA1200566 | CWS | Orleans | 85 | Humboldt County |
| Oroville Mobile Home Park | CA0400019 | CWS | Sacramento | 76 | Butte County |
| Ortega Oaks Rv Park&Campground | CA3301482 | CWS | Lake Forest | 180 | Riverside County |
| Orwood Resort | CA0707545 | CWS | Brentwood | 350 | Contra Costa County |
| Outdoor Resorts Rancho Ca | CA3301961 | CWS | Aguanga | 600 | Riverside County |
| Outlook Wa | CA2700622 | CWS | Carmel Valley | 35 | Monterey County |
| Outside Creek School | CA5400972 | NTNCWS | Visalia | 125 | Tulare County |
| Owens Peak South | CA1502659 | CWS | Ridgecrest | 50 | Kern County |
| Owens Peak West | CA1502608 | CWS | Inyokern | 79 | Kern County |
| Owens Valley Water Resources, Inc. | CA1400005 | CWS | Claremont | 311 | Inyo County |
| Owens-Brockway Glass Container Inc | CA3900825 | NTNCWS | Tracy | 404 | San Joaquin County |
| Oxnard Pallet Company | CA5603123 | NTNCWS | Oxnard | 38 | Ventura County |
| P G & E-Turner Cut Water System | CA3901388 | NTNCWS | Oakland | 30 | San Joaquin County |
| Pacheco Elementary School | CA4500160 | NTNCWS | Redding | 450 | Shasta County |
| Pacific Bell Ue17L Water System | CA3901086 | NTNCWS | Dallas | 150 | San Joaquin County |
| Pacific Coast Energy Company | CA4200961 | NTNCWS | Orcutt | 50 | Santa Barbara County |
| Pacific Dunes Ranch | CA4000226 | NTNCWS | Oceano | 26 | San Luis Obispo County |
| Pacific Point Christian School | CA4300610 | NTNCWS | Gilroy | 165 | Santa Clara County |
| Pacific Reserve Nursery Ws | CA2700101 | NTNCWS | Rio Vista | 25 | Monterey County |
| Pacific Scientific Energetic Mats. Comp. | CA3500563 | NTNCWS | Hollister | 550 | San Benito County |
| Pacific Union College | CA2810012 | CWS | Angwin | 758 | Napa County |
| Pacific Union Elementary School | CA1000194 | NTNCWS | Fresno | 490 | Fresno County |
| Pacific Woodtech | CA5200655 | NTNCWS | Red Bluff | 70 | Tehama County |
| Packwood School | CA5400850 | NTNCWS | Visalia | 105 | Tulare County |
| Page Avenue Mutual Water Company | CA3000585 | CWS | Fullerton | 119 | Orange County |
| Paicines Ranch | CA3500925 | NTNCWS | Paicines | 52 | San Benito County |
| Painted Cave | CA4200578 | CWS | Santa Barbara | 160 | Santa Barbara County |
| Pajaro Valley Greenhouse Ws | CA2700875 | NTNCWS | Salinas | 80 | Monterey County |
| Pala South | 090600144 | CWS | Pala | 360 | San Diego County |
| Pali Overnight Adventures | CA3600597 | NTNCWS | Running Springs | 54 | San Bernardino County |
| Palisade Glacier High School | CA1400522 | NTNCWS | Big Pine | 37 | Inyo County |
| Palisades, The | CA1100452 | CWS | Redding | 62 | Glenn County |
| Palm Springs Aerial Tramway | CA3301494 | NTNCWS | Palm Springs | 1,530 | Riverside County |
| Palm Springs Crest | CA3310081 | CWS | Desert Hot Springs | 399 | Riverside County |
| Palmer Creek Csd | CA1206004 | CWS | Fortuna | 320 | Humboldt County |
| Palms River Resort | CA3600372 | CWS | Needles | 531 | San Bernardino County |
| Palo Alto Park Mutual Water Company | CA4110020 | CWS | East Palo Alto | 2,900 | San Mateo County |
| Palo Verde County Water Dist. | CA1300616 | CWS | Palo Verde | 410 | Imperial County |
| Palo Verde Union Elementary School | CA5400519 | NTNCWS | Tulare | 500 | Tulare County |
| Palomar Christian Conference Center | CA3701982 | CWS | Palomar Mountain | 33 | San Diego County |
| Palomar Mountain Mutual Water Co. | CA3700933 | CWS | Bonita | 150 | San Diego County |
| Palomar Observatory | CA3702236 | CWS | Palomar Mountain | 20 | San Diego County |
| Palomino Estates Water Company | CA1206002 | CWS | Garberville | 64 | Humboldt County |
| Palomino Lakes Mutual Water Co. | CA4900570 | CWS | Cloverdale | 300 | Sonoma County |
| Panama Road Property Owners Assoc | CA1502465 | CWS | Bakersfield | 45 | Kern County |
| Panoche Water District | CA1000345 | CWS | Firebaugh | 225 | Fresno County, Merced County |
| Pape Machinery | CA3400416 | NTNCWS | Sacramento | 44 | Sacramento County |
| Pappas & Co (Mendota) | CA1009039 | CWS | Fresno | 39 | Fresno County |
| Par Country Estates Csa-16 | CA3901172 | CWS | Stockton | 178 | San Joaquin County |
| Paradise Lake Mutual Water Co. | CA2700674 | CWS | Salinas | 213 | Monterey County |
| Paradise Mobile Estates | CA3600399 | CWS | San Juan Capistrano | 106 | San Bernardino County |
| Paradise Ranch Mhp | CA1910099 | CWS | Beverly Hills | 360 | Los Angeles County |
| Paradise Rd Ws #05 | CA2700678 | CWS | Prunedale | 42 | Monterey County |
| Paradise Rd Ws #09 | CA2700682 | CWS | Salinas | 56 | Monterey County |
| Paradise Rd Ws #21 | CA2701633 | CWS | Salinas | 48 | Monterey County |
| Paradise School | CA5000274 | NTNCWS | Modesto | 218 | Stanislaus County |
| Paradise Valley Mwc | CA3301502 | CWS | Mountain Center | 30 | Riverside County |
| Paradise Water System | CA1503194 | NTNCWS | Bakersfield | 31 | Kern County |
| Paragon Triangle Water Supply | CA4000604 | NTNCWS | San Luis Obispo | 50 | San Luis Obispo County |
| Pardee Center | CA0500053 | NTNCWS | Valley Springs | 50 | Calaveras County |
| Pardee Recreation Area | CA0301038 | NTNCWS | Valley Springs | 116 | Amador County |
| Park Green Houses Water System | CA3901466 | NTNCWS | Ripon | 25 | San Joaquin County |
| Park Heights Mutual Water Co | CA5000017 | CWS | Modesto | 250 | Stanislaus County |
| Park Investments Water System | CA5400887 | NTNCWS | Three Rivers | 26 | Tulare County |
| Park Moabi | CA3600193 | NTNCWS | San Bernardino | 267 | San Bernardino County |
| Park Royal Mutual Water Company | CA4900553 | CWS | Santa Rosa | 75 | Sonoma County |
| Park West Mutual Water Company | CA1400110 | CWS | Bishop | 188 | Inyo County |
| Parkway Lakes Rv Park | CA4300924 | CWS | Sacramento | 250 | Santa Clara County |
| Parreira Almond Processing Company, Llc | CA2400338 | NTNCWS | Los Banos | 76 | Merced County |
| Parsons Water Supply | CA4000778 | NTNCWS | San Luis Obispo | 35 | San Luis Obispo County |
| Partington Mwc | CA2701263 | CWS | Big Sur | 35 | Monterey County |
| Paskenta Comm. Services Dist. | CA5200534 | CWS | Paskenta | 237 | Tehama County |
| Paso 360 | CA4000781 | NTNCWS | St. Helena | 65 | San Luis Obispo County |
| Paso Robles Chevrolet Cadillac | CA4000692 | NTNCWS | Paso Robles | 25 | San Luis Obispo County |
| Pauma Valley Water Company | CA3700934 | CWS | Pauma Valley | 185 | San Diego County |
| Pavestone | CA5700798 | NTNCWS | Winters | 42 | Yolo County |
| Pcsh, Llc | CA2800112 | NTNCWS | St. Helena, Ca 94574 | 25 | Napa County |
| Pcwa - Weimar | CA3110035 | CWS | Auburn | 1,689 | Placer County |
| Peak To Peak Mountain Charter School Ws | CA1503683 | NTNCWS | Pine Mountain Club | 100 | Kern County |
| Pedrazzi Mwc | CA2701364 | CWS | Salinas | 273 | Monterey County |
| Peju Province | CA2801027 | NTNCWS | Rutherford | 27 | Napa County |
| Pena'S Disposal Services | CA5403205 | NTNCWS | Cutler | 86 | Tulare County |
| Penn Valley Shopping Center | CA2900532 | NTNCWS | Penn Valley | 82 | Nevada County |
| Penngrove Water Company (Puc) | CA4910003 | CWS | Santa Rosa | 1,742 | Sonoma County |
| Pentecostal Ws | CA2700558 | NTNCWS | Salinas | 29 | Monterey County |
| Peppermint Creek Mhp | CA5500116 | CWS | Stockton | 280 | Tuolumne County |
| Pesante Rd Ws #02 | CA2700687 | CWS | Salinas | 120 | Monterey County |
| Pesante Rd Ws #06 | CA2700691 | CWS | Salinas | 50 | Monterey County |
| Peters Fruit Farms, Inc | CA5403081 | NTNCWS | Reedley | 125 | Tulare County |
| Pg & E Pipeline Operation | CA3600192 | NTNCWS | Hinkley | 50 | San Bernardino County |
| Pg&E | CA4000589 | NTNCWS | Avila Beach | 1,200 | San Luis Obispo County |
| Pg&E | CA5800919 | NTNCWS | Marysville | 50 | Yuba County |
| Pg&E - Table Mountain | CA0409187 | NTNCWS | San Ramon | 25 | Butte County |
| Pg&E Auberry Service Center | CA1000548 | NTNCWS | Auberry | 25 | Fresno County |
| Pg&E Gregg Substation And Gc Yard | CA2000955 | NTNCWS | Fresno | 29 | Madera County |
| Pg&E Helms Support Facility | CA1000472 | CWS | Auberry | 40 | Fresno County |
| Pg&E Oakhurst Service Center | CA2000733 | NTNCWS | San Ramon | 40 | Madera County |
| Pg&E Rodgers Flat Service Center | CA3200166 | NTNCWS | Magalia | 39 | Plumas County |
| Phelps Vineyards | CA2800609 | NTNCWS | St. Helena | 56 | Napa County |
| Pheneger Creek Ws | CA2702373 | NTNCWS | Big Sur | 29 | Monterey County |
| Phillips Farms | CA3901176 | NTNCWS | Lodi | 30 | San Joaquin County |
| Phillipsville C.S.D. | CA1200541 | CWS | Phillipsville | 124 | Humboldt County |
| Phoenix Lake Estates Cc Mwc | CA5510026 | CWS | Standard | 1,168 | Tuolumne County |
| Pier 1900 Homeowner'S Association | CA1700630 | CWS | Lakeport | 152 | Lake County |
| Pierpoint Springs Water Co. | CA5400732 | CWS | Springville | 27 | Tulare County |
| Pike Ranch Mutual Water Co | CA2000526 | CWS | Oakhurst | 74 | Madera County |
| Pilot Travel Center #168 - Water | CA5700552 | NTNCWS | Chico | 82 | Yolo County |
| Pine Cove Rv Park | CA5301008 | CWS | Camas | 223 | Trinity County |
| Pine Cove Water District | CA3310030 | CWS | Idyllwild | 1,540 | Riverside County |
| Pine Creek Village | CA1400006 | CWS | Mammoth Lakes | 240 | Inyo County |
| Pine Grove Mobile Home Park | CA0800800 | CWS | San Diego | 142 | Del Norte County |
| Pine Grove Mobilehome Park | CA4500290 | CWS | Pleasant Hill | 53 | Shasta County |
| Pine Hill Egg Ranch | CA3710055 | NTNCWS | Ramona | 40 | San Diego County |
| Pine Hill Terrace Mobile Home Park | CA4900674 | CWS | Sebastopol | 27 | Sonoma County |
| Pine Hills Mutual Water Company | CA3700905 | CWS | Julian | 380 | San Diego County |
| Pine Mountain Mutual Water Co. | CA2300591 | CWS | Willits | 310 | Mendocino County |
| Pine Ridge Park Estates | CA4500089 | CWS | Red Bluff | 44 | Shasta County |
| Pine Ridge School | CA1000111 | NTNCWS | Auberry | 100 | Fresno County |
| Pine Ridge Winery | CA2801029 | NTNCWS | Napa | 75 | Napa County |
| Pine St Ws #01 | CA2701403 | CWS | Greenfield | 65 | Monterey County |
| Pine Tree Lane Mutual Water Co | CA4400582 | CWS | Aptos | 75 | Santa Cruz County |
| Pine Union School | CA1300560 | NTNCWS | Holtville | 217 | Imperial County |
| Pine Valley Bible Conference Center | CA3701934 | CWS | Pine Valley | 50 | San Diego County |
| Pine Valley Border Patrol Station | CA3710049 | NTNCWS | San Diego | 54 | San Diego County |
| Pine Valley Mutual Wc | CA3710039 | CWS | Pine Valley | 2,574 | San Diego County |
| Pine Valley Trailer Park | CA3701961 | CWS | Costa Mesa | 200 | San Diego County |
| Pinebrook Community Water Well | CA1500404 | CWS | Wofford Heights | 68 | Kern County |
| Pinecrest Elementary School | CA5500221 | NTNCWS | Pinecrest | 26 | Tuolumne County |
| Pinecrest Permittees Assn | CA5510004 | CWS | Pinecrest | 55 | Tuolumne County |
| Pineview Mobile Home Park | CA1800523 | CWS | Cedar Glen | 80 | Lassen County |
| Pinon Pines Mwc | CA1510054 | CWS | Frazier Park | 908 | Kern County |
| Pinon Valley Water Company | CA1500540 | CWS | Tehachapi | 112 | Kern County |
| Pinyon Crest Hoa | CA3301511 | CWS | Palm Desert | 104 | Riverside County |
| Pinyon Pines County Water Dist | CA3301512 | CWS | Mountain Center | 232 | Riverside County |
| Pioneer Elementary School | CA0900111 | NTNCWS | Somerset | 221 | El Dorado County |
| Pioneer Elementary School | CA1600011 | NTNCWS | Hanford | 750 | Kings County |
| Pioneer Equine Hospital Water System | CA5000581 | NTNCWS | Oakdale | 25 | Stanislaus County |
| Pioneer Hi-Bred International | CA5700827 | NTNCWS | Woodland | 80 | Yolo County |
| Pioneer Place Mws | CA2701956 | CWS | Aromas | 64 | Monterey County |
| Pit River Montgomery Creek Rancheria | 090605062 | CWS | Burney | 90 | Shasta County |
| Pit River Xl Rancheria | 090605041 | CWS | Burney | 61 | Modoc County |
| Piute Mountain School Water | CA1502607 | NTNCWS | Caliente | 75 | Kern County |
| Pixley Public Util Dist | CA5410009 | CWS | Pixley | 2,772 | Tulare County |
| Placer Csa - Sheridan | CA3110048 | CWS | Auburn | 653 | Placer County |
| Placer Cwa - Alta | CA3110024 | CWS | Auburn | 1,044 | Placer County |
| Placer Cwa - Applegate | CA3110050 | CWS | Auburn | 190 | Placer County |
| Placer Cwa - Bianchi Estates | CA3110040 | CWS | Auburn | 110 | Placer County |
| Placer Cwa - Colfax | CA3110006 | CWS | Auburn | 3,073 | Placer County |
| Placer Cwa - Monte Vista | CA3110124 | CWS | Auburn | 46 | Placer County |
| Plainfield Elem School - Water | CA5700643 | NTNCWS | Woodland | 400 | Yolo County |
| Plainsburg Elementary School | CA2400065 | NTNCWS | Merced | 123 | Merced County |
| Plainview Mutual Water Company | CA5410039 | CWS | Strathmore | 617 | Tulare County |
| Plainview Mwc - Central Water | CA5400682 | CWS | Strathmore | 138 | Tulare County |
| Planada Elementaryschool | CA2400066 | NTNCWS | Planada | 567 | Merced County |
| Plant Water Well - Rockview Dairy | CA1909648 | NTNCWS | Downey | 45 | Los Angeles County |
| Plantation Mobile Home Park | CA3400401 | CWS | Sacramento | 20 | Sacramento County |
| Plantation On The Lake Park | CA3301943 | CWS | Calimesa | 885 | Riverside County |
| Plavada Community Association | CA2910011 | CWS | Soda Springs | 126 | Nevada County |
| Playa Dulce | CA4000837 | NTNCWS | San Luis Obispo | 35 | San Luis Obispo County |
| Plaza Elementary School | CA1100448 | NTNCWS | Orland | 250 | Glenn County |
| Plaza Mobile Home Park | CA4900787 | CWS | Stockton | 169 | Sonoma County |
| Pleasant Grove Elem. School | CA5100143 | NTNCWS | Pleasant Grove | 177 | Sutter County |
| Pleasant Grove Elementary School | CA3400250 | NTNCWS | Sacramento | 553 | Sacramento County |
| Pleasant Ridge School | CA2900535 | NTNCWS | Grass Valley | 250 | Nevada County |
| Pleasant Valley Baptist Church | CA0400162 | NTNCWS | Chico | 600 | Butte County |
| Pleasant Valley Elementary | CA4000774 | NTNCWS | San Miguel | 100 | San Luis Obispo County |
| Pleasant View West School | CA5400882 | NTNCWS | Porterville | 220 | Tulare County |
| Pleasantimes Mutual Water Co | CA0707576 | CWS | Bethel Island | 644 | Contra Costa County |
| Plug Connection Lodi | CA3901278 | NTNCWS | Vista | 102 | San Joaquin County |
| Plum Valley Elem School (New School) | CA5200506 | NTNCWS | Red Bluff | 70 | Tehama County |
| Plumas Eureka Csd | CA3210011 | CWS | Blairsden | 334 | Plumas County |
| Plumfield Academy School (Occidental Rd) | CA4901215 | NTNCWS | Sebastopol | 30 | Sonoma County |
| Plymouth, City Of | CA0310004 | CWS | Plymouth | 1,060 | Amador County |
| Pnf Mt Hough Ranger Station | CA3200048 | NTNCWS | Quincy | 100 | Plumas County |
| Pnp Stockton #80 | CA3901481 | NTNCWS | Rancho Cordova | 59 | San Joaquin County |
| Poindexter Nut Company | CA1000575 | NTNCWS | Selma | 50 | Fresno County |
| Point Arena Rancheria | 090600145 | CWS | Point Arena | 616 | Mendocino County |
| Point Arena Water Works | CA2310013 | CWS | Point Arena | 459 | Mendocino County |
| Point Cabrillo Highlands | CA2300668 | CWS | Oakland | 42 | Mendocino County |
| Point Of View Mutual Water Co | CA2300604 | CWS | Mendocino | 36 | Mendocino County |
| Polymerpak | CA5400969 | NTNCWS | Exeter | 50 | Tulare County |
| Pond Mutual Water Company | CA1502620 | CWS | Wasco | 48 | Kern County |
| Pond School Water System | CA1502221 | NTNCWS | Wasco | 250 | Kern County |
| Pond-Derosa Oaks Wc | CA2701553 | CWS | Fremont | 216 | Monterey County |
| Ponderosa Csd | CA5400934 | CWS | Springville | 340 | Tulare County |
| Ponderosa Mobile Home Park | CA5500092 | CWS | Dana Point | 146 | Tuolumne County |
| Ponderosa Telephone-Service Ct | CA2000843 | NTNCWS | Oneals | 46 | Madera County |
| Poplar Comm Service Dist | CA5410026 | CWS | Poplar | 2,200 | Tulare County |
| Port Hueneme Water Agency | CA5610080 | CWS | Port Hueneme | 0 | Ventura County |
| Port San Luis Harbor District | CA4000800 | NTNCWS | Avila Beach | 125 | San Luis Obispo County |
| Port Sonoma Marina | CA4901297 | NTNCWS | Petaluma | 50 | Sonoma County |
| Porterville Citrus Rayo | CA5400541 | NTNCWS | Terra Bella | 100 | Tulare County |
| Porterville Developmental Center | CA5410801 | CWS | Porterville | 176 | Tulare County |
| Porterville Mobile Village | CA5400504 | CWS | Sacramento | 205 | Tulare County |
| Portola Improvement Association Mwc | CA4100555 | CWS | La Honda | 80 | San Mateo County |
| Post Ranch Inn Ws | CA2702299 | CWS | Big Sur | 70 | Monterey County |
| Potter Valley School District | CA2300755 | NTNCWS | Potter Valley | 309 | Mendocino County |
| Power Systems Headquarters - Ycwa | CA5800015 | NTNCWS | Dobbins | 40 | Yuba County |
| Prairie Elementary School | CA4500161 | NTNCWS | Redding | 375 | Shasta County |
| Prather Water District | CA1000424 | NTNCWS | Clovis | 49 | Fresno County |
| Precision Mutual Water Company | CA4000224 | NTNCWS | Arroyo Grande | 25 | San Luis Obispo County |
| Presentation School | CA4900945 | NTNCWS | Sonoma | 200 | Sonoma County |
| Preserve At Millerton Lake Water System | CA2010018 | CWS | Pismo Beach | 204 | Madera County |
| Prima Frutta Packing | CA3901456 | NTNCWS | Linden | 25 | San Joaquin County |
| Primex Farms Water System | CA1503521 | NTNCWS | Wasco | 450 | Kern County |
| Primm Valley Golf Club | CA3601122 | NTNCWS | Las Vegas | 50 | San Bernardino County |
| Primrose Lane Apartments | CA1400045 | CWS | Camarillo | 73 | Inyo County |
| Princes Camp Resort Ws | CA2701355 | CWS | Salinas | 126 | Monterey County |
| Prunedale Mwc | CA2700702 | CWS | Salinas | 277 | Monterey County |
| Prunedale School Ws | CA2700705 | NTNCWS | Salinas | 655 | Monterey County |
| Prunedale Shopping Center Ws | CA2701231 | NTNCWS | Larkspur | 150 | Monterey County |
| Prunetree Shopping Center Ws | CA2702368 | NTNCWS | Irvine | 200 | Monterey County |
| Psmcsd - Blackie Rd Ws | CA2702094 | CWS | Royal Oaks | 60 | Monterey County |
| Psmcsd - Langley/Valle Pacifico Ws | CA2701670 | CWS | Royal Oaks | 81 | Monterey County |
| Psmcsd - Moss Landing Harbor Ws | CA2701515 | CWS | Royal Oaks | 520 | Monterey County |
| Psmcsd - Normco | CA2700511 | CWS | Royal Oaks | 928 | Monterey County |
| Psmcsd - Springfield Ws | CA2700771 | CWS | Royal Oaks | 200 | Monterey County |
| Psmcsd - Sunny Mesa | CA2700773 | CWS | Royal Oaks | 880 | Monterey County |
| Psmcsd - Vega Rd Ws #01 | CA2700787 | CWS | Royal Oaks | 438 | Monterey County |
| Psmcsd - Vierra Estates Ws | CA2702007 | CWS | Royal Oaks | 164 | Monterey County |
| Puente Housing Solutions | CA4100610 | CWS | Pescadero | 28 | San Mateo County |
| Puerta La Cruz Cc #14 | CA3710800 | CWS | Warner Springs | 40 | San Diego County |
| Pulikla Tribe | 090605057 | CWS | Klamath | 70 | |
| Puresource Water, Inc | CA4400598 | CWS | Aptos | 210 | Santa Cruz County |
| Purina Mills Inc | CA5000454 | NTNCWS | Turlock | 25 | Stanislaus County |
| Pyramid Flowers | CA5602513 | NTNCWS | Oxnard | 30 | Ventura County |
| Quady Residence And Wnery | CA2000956 | NTNCWS | Madera | 32 | Madera County |
| Quail Creek Estates Mutual Water Company | CA4300979 | CWS | Gilroy | 55 | Santa Clara County |
| Quechan Casino Resort | 090400679 | NTNCWS | Winterhaven | 2,950 | |
| Quiet Oaks Mobile Home Park | CA3701341 | CWS | Stockton | 120 | San Diego County |
| Quintette Service Corp Water | CA0900308 | CWS | Georgetown | 68 | El Dorado County |
| Quivira Vineyards | CA4901162 | NTNCWS | Healdsburg | 31 | Sonoma County |
| Qvwd-West & East Combined Water System | CA1503226 | CWS | Tehachapi | 221 | Kern County |
| R A Farms | CA4400543 | NTNCWS | Watsonville | 48 | Santa Cruz County |
| R Ranch At The Lake | CA2800593 | CWS | Napa | 20 | Napa County |
| R-Ranch In The Sequoias | CA5402036 | CWS | Kernville | 25 | Tulare County |
| R-Wild Horse Ranch | CA5200864 | CWS | Platina | 55 | Tehama County |
| R.S. Mutual Water Company | CA1500458 | CWS | Wofford Heights | 35 | Kern County |
| Ragged Point Inn | CA4000684 | NTNCWS | Ragged Point | 100 | San Luis Obispo County |
| Rainbird Valley Mwc | CA1500393 | CWS | Weldon | 238 | Kern County |
| Rainbow Farms | CA5000440 | NTNCWS | Turlock | 30 | Stanislaus County |
| Rainbow'S End Mobile Home Park | CA4500334 | CWS | Burney | 30 | Shasta County |
| Raineri Mutual Water Company | CA4300520 | CWS | Los Gatos | 145 | Santa Clara County |
| Rains Creek Water District | CA4900611 | CWS | Cloverdale | 208 | Sonoma County |
| Rambling Hills Estates | CA5500243 | CWS | Guerneville | 78 | Tuolumne County |
| Ramon Zaragoza Water | 090600036 | CWS | Thermal | 51 | |
| Ramona Oaks Rv Resort | CA3702338 | NTNCWS | Ramona | 250 | San Diego County |
| Ramona Water Company | CA3301529 | CWS | Anza | 250 | Riverside County |
| Ranch Road Estates Mutual Water Company | CA1400031 | CWS | Bishop | 57 | Inyo County |
| Rancheritos #2 | CA3601186 | CWS | Apple Valley | 291 | San Bernardino County |
| Rancho Borromeo Mwc | CA2700709 | CWS | Salinas | 100 | Monterey County |
| Rancho Calimesa Mobile Home Park | CA3301534 | CWS | Calimesa | 296 | Riverside County |
| Rancho Carrillo Mwc | CA3301535 | CWS | Rancho Mission Viejo | 210 | Riverside County |
| Rancho Chaparral Mwc | CA2701278 | CWS | Big Sur | 42 | Monterey County |
| Rancho Colina Mobile Home Park | CA4000653 | CWS | Morro Bay | 252 | San Luis Obispo County |
| Rancho Colorado Ws | CA5200575 | CWS | Red Bluff | 34 | Tehama County |
| Rancho Corralitos | CA4400624 | CWS | Corralitos | 87 | Santa Cruz County |
| Rancho Del Campo Water System | CA3700859 | CWS | Spring Valley | 290 | San Diego County |
| Rancho Del Oro Mhp | CA0300053 | CWS | Placida | 44 | Amador County |
| Rancho Del Paradiso-Cal Water Svc (Puc) | CA4900514 | CWS | San Jose | 110 | Sonoma County |
| Rancho Estates Mutual Water Co. | CA3700936 | CWS | Pauma Valley | 200 | San Diego County |
| Rancho Marcelino Water | CA4200531 | CWS | Solvang | 240 | Santa Barbara County |
| Rancho Marina | CA3400149 | CWS | Sacramento | 60 | Sacramento County |
| Rancho Nipomo Water Company | CA4000771 | CWS | Arroyo Grande | 44 | San Luis Obispo County |
| Rancho Pauma Mutual Wc | CA3710012 | CWS | Pauma Valley | 899 | San Diego County |
| Rancho Pino Verde | CA3601085 | CWS | Lucerne Valley | 66 | San Bernardino County |
| Rancho Robles Mutual Water Company | CA4300577 | CWS | San Martin | 103 | Santa Clara County |
| Rancho Salinas Mbwc | CA4000803 | CWS | Paso Robles | 50 | San Luis Obispo County |
| Rancho San Andreas | CA4400660 | CWS | Watsonville | 200 | Santa Cruz County |
| Rancho San Joaquin Mwc | CA3500581 | CWS | Hollister | 96 | San Benito County |
| Rancho San Joaquin Water Sys | CA3900558 | CWS | Stockton | 172 | San Joaquin County |
| Rancho Santa Teresa Mw Co. | CA3700918 | CWS | Ramona | 102 | San Diego County |
| Rancho Seco Inc. Water System | CA1500327 | CWS | Cantil | 33 | Kern County |
| Rancho Seco Ngs (Smud) | CA3400232 | NTNCWS | Sacramento | 31 | Sacramento County |
| Rancho Sespe Workers Imp Assoc | CA5601144 | CWS | Clovis | 600 | Ventura County |
| Rancho Tehama Elem School | CA5205007 | NTNCWS | Corning | 90 | Tehama County |
| Rancho Villanueva Llc | 090605145 | CWS | Pala | 68 | |
| Rancho Ynecita | CA4200837 | CWS | Los Olivos | 129 | Santa Barbara County |
| Ranchos Del Rio | CA1500553 | CWS | Bakersfield | 62 | Kern County |
| Ranchos Los Ferro Mhp | 090600032 | CWS | Thermal | 41 | |
| Rand Communities Water District | CA1510016 | CWS | Johanesburg | 303 | Kern County, San Bernardino County |
| Randal'S Ranchette Mutual Water Company | CA4900599 | CWS | Santa Rosa | 93 | Sonoma County |
| Randall-Bold Water Treatment Plant | CA0710010 | CWS | Concord | 1 | Contra Costa County |
| Rapid River Mobilehome Park | CA4500203 | CWS | Moraga | 92 | Shasta County |
| Ratna Ling Retreat | CA4901264 | NTNCWS | Cazadero | 37 | Sonoma County |
| Ratto Bros, Inc | CA5000499 | NTNCWS | Modesto | 110 | Stanislaus County |
| Rau Dairy | CA1009120 | CWS | Caruthers | 66 | Fresno County |
| Rawhide Mutual Water Company | CA5500071 | CWS | Jamestown | 269 | Tuolumne County |
| Rawson Creek Mutual Water Company | CA1400026 | CWS | Bishop | 90 | Inyo County |
| Ray Water Company | CA4200867 | CWS | Santa Maria | 40 | Santa Barbara County |
| Ray'S Station Winery | CA2300879 | NTNCWS | Hopland | 134 | Mendocino County |
| Raymond Vineyard & Cellar | CA2801031 | NTNCWS | St Helena | 90 | Napa County |
| Rbvon | CA5000593 | NTNCWS | Westley | 50 | Stanislaus County |
| Rebel Ridge Village | CA5800850 | CWS | Camptonville | 60 | Yuba County |
| Reche Canyon Mutual Water Co. | CA3301541 | CWS | Colton | 150 | Riverside County |
| Red Bluff Fish & Wildlife Office | CA5205009 | NTNCWS | Red Bluff | 38 | Tehama County |
| Redcrest Water Works | CA1200544 | CWS | Whitethorn | 116 | Humboldt County |
| Redding Rancheria | 090605083 | CWS | Redding | 2,015 | |
| Redding Travel Center | CA4500149 | NTNCWS | Westlake | 120 | Shasta County |
| Redway C.S.D. | CA1210011 | CWS | Redway | 1,207 | Humboldt County |
| Redwood Empire Sawmill | CA4901179 | NTNCWS | Cloverdale | 80 | Sonoma County |
| Redwood Glen Camp & Conference Ctr | CA4100522 | CWS | Loma Mar | 31 | San Mateo County |
| Redwood Heights Mutual Water Company | CA4900639 | CWS | Cazadero | 30 | Sonoma County |
| Redwood Maint. & Oper. | CA0800647 | NTNCWS | Crescent City | 421 | Del Norte County |
| Redwood Park C.S.D. | CA0800526 | CWS | Klamath | 200 | Del Norte County |
| Redwood Terrace Mutual | CA4100510 | CWS | La Honda | 56 | San Mateo County |
| Redwood Valley Rancheria | 090605118 | CWS | Redwood Valley | 152 | Mendocino County |
| Reeds Creek Estates | CA5200500 | CWS | Red Bluff | 70 | Tehama County |
| Reeds Creek School | CA5200540 | NTNCWS | Red Bluff | 196 | Tehama County |
| Reesedale Mutual Water Company | CA1900145 | CWS | Lancaster | 76 | Los Angeles County |
| Reforestation Technologies International | CA4300951 | NTNCWS | Gilroy | 34 | Santa Clara County |
| Renaissance High School | CA4400758 | NTNCWS | Watsonville | 166 | Santa Cruz County |
| Resort Improvement District #1 | CA1210022 | CWS | Whitethorn | 803 | Humboldt County |
| Resource Center | CA4200977 | NTNCWS | Goleta | 85 | Santa Barbara County |
| Resthaven Mobile Home Park | CA4000654 | CWS | Paso Robles | 99 | San Luis Obispo County |
| Revol Greens | CA1503682 | NTNCWS | Tehachapi | 190 | Kern County |
| Reynolds Consumer Products (Red Bluff) | CA5200626 | NTNCWS | Reb Bluff | 60 | Tehama County |
| Reynolds Water System | CA1700744 | NTNCWS | Middletown | 100 | Lake County |
| Richard A. Mcgee Training Center | CA3410802 | NTNCWS | Galt | 300 | Sacramento County |
| Richardson Beardsley Park Inc. | CA3701780 | CWS | Julian | 30 | San Diego County |
| Richfield Elementary School | CA5200565 | NTNCWS | Corning | 280 | Tehama County |
| Richgrove Community Services District | CA5410024 | CWS | Richgrove | 1,617 | Tulare County |
| Richmond Elementary School | CA1800573 | NTNCWS | Susanville | 221 | Lassen County |
| Richvale Elementary School | CA0400062 | NTNCWS | Biggs | 63 | Butte County |
| Ridge Mutual Water Company | CA4400618 | CWS | Los Gatos | 213 | Santa Cruz County |
| Ridgeview Estates Mwc | CA4400585 | CWS | Boulder Creek | 50 | Santa Cruz County |
| Ridgewood Water System | CA2300708 | CWS | Willits | 265 | Mendocino County |
| Riebli Mutual Water Company | CA4900603 | CWS | Fulton | 150 | Sonoma County |
| Rim Rock Water Company | CA4000750 | CWS | Grover Beach | 55 | San Luis Obispo County |
| Rincon Del Diablo Mwd (Id-A) | CA3710044 | CWS | Escondido | 5,016 | San Diego County |
| Rincon Paradise Creek | 090600146 | CWS | Valley Center | 305 | San Diego County |
| Rincon Valley Mobile Estates | CA4900600 | CWS | Novato | 460 | Sonoma County |
| Rincon Water & Road Works | CA5601137 | CWS | Ventura | 25 | Ventura County |
| Rio Alto Water District | CA5210005 | CWS | Cottonwood | 3,377 | Tehama County |
| Rio Bend Rv Golf Resort & Storm Crossing | CA1300620 | CWS | El Centro | 130 | Imperial County |
| Rio Bravo Greeley School Water System | CA1502229 | NTNCWS | Bakersfield | 1,219 | Kern County |
| Rio Cosumnes Correctional Center [Sws] | CA3400229 | CWS | Sacramento | 2,800 | Sacramento County |
| Rio Lindo Adventist Academy | CA4900577 | CWS | Healdsburg | 178 | Sonoma County |
| Rio Manor Mutual Water Co | CA5610035 | CWS | Camarillo | 983 | Ventura County |
| Rio Mesa High School/Oxnard Uhs | CA5602407 | NTNCWS | Oxnard | 2,600 | Ventura County |
| Rio Ranch Community Svcs Dist | CA5200555 | CWS | Red Bluff | 44 | Tehama County |
| Rio School Dist/ Rio Real School | CA5602408 | NTNCWS | Oxnard | 550 | Ventura County |
| Rio School Dist/Rio Del Valle School | CA5602406 | NTNCWS | Oxnard | 820 | Ventura County |
| Rio Vista Mobile Home Park | CA5200508 | CWS | Sacramento | 543 | Tehama County |
| Rio Vista Mobilehome Estates | CA4500106 | CWS | Redding | 26 | Shasta County, Tehama County |
| Ripon Usd-Colony Oak School | CA3901331 | NTNCWS | Ripon | 465 | San Joaquin County |
| Ripperdan Community Day School | CA2000602 | NTNCWS | Madera | 120 | Madera County |
| Riselen Park | CA5800823 | CWS | Sacramento | 100 | Yuba County |
| Rite Of Passage/Sierra Ridge | CA0500091 | CWS | San Andreas | 65 | Calaveras County |
| River Breeze Mobile Home Park | CA4500092 | CWS | Sacramento | 87 | Shasta County |
| River Estates Mutual Water Company | CA2300605 | CWS | Ukiah | 250 | Mendocino County |
| River Grove Mutual Water Assn | CA4400621 | CWS | Felton | 54 | Santa Cruz County |
| River Highlands Csd | CA5800820 | CWS | Marysville | 200 | Yuba County |
| River Pines Pud | CA0310006 | CWS | River Pines | 574 | Amador County |
| River Ranch Farm Worker Center | CA2800035 | CWS | Napa | 66 | Napa County |
| River Ranch Mhp | CA3600155 | CWS | Victorville | 176 | San Bernardino County |
| River Ranch Mobile Home Park | CA5200510 | CWS | Concord | 305 | Tehama County |
| River Rd Ws #25 | CA2701063 | CWS | Gonzales | 65 | Monterey County |
| River Reflections Estates | 090600194 | CWS | Earp | 267 | San Bernardino County |
| River Retreat Mutual Water Company | CA5400556 | CWS | Three Rivers | 64 | Tulare County |
| River Road Mutual Water Company | CA5000020 | CWS | Modesto | 26 | Stanislaus County |
| River Road Plaza | CA5000447 | NTNCWS | Oakdale | 25 | Stanislaus County |
| River Valley Christian School | CA1100749 | NTNCWS | Orland | 80 | Glenn County |
| River View Mhc Llc | CA5200558 | CWS | Sacramento | 100 | Tehama County |
| River'S Edge Marina & Resort | CA3400107 | CWS | Isleton | 150 | Sacramento County |
| Riverbank Lra | CA5000211 | NTNCWS | Riverbank | 156 | Stanislaus County |
| Riverbend Mobile Home & Rv Park | CA1000426 | CWS | Granite Bay | 87 | Fresno County |
| Riverdale Estates | CA3301040 | CWS | Irvine | 300 | Riverside County |
| Riverdale Park Tract Csd | CA5000019 | CWS | Modesto | 610 | Stanislaus County |
| Riverdale Public Utility District | CA1010028 | CWS | Riverdale | 2,756 | Fresno County |
| Riverdale Village | CA1500452 | CWS | Bakersfield | 750 | Kern County |
| Riverfront Mutual Water Company | CA1300664 | CWS | Alpine | 25 | Imperial County |
| Rivergold Elementary School | CA2000844 | NTNCWS | Oakhurst | 444 | Madera County |
| Riverkern Mutual Water Company | CA1500251 | CWS | Kernville | 272 | Kern County |
| Riverland Mobilehome Park | CA4500094 | CWS | Stockton | 260 | Shasta County |
| Riverland Resort | CA5400929 | CWS | Reedley | 40 | Tulare County |
| Rivernook Campground | CA1500481 | CWS | Kernville | 70 | Kern County |
| Rivers End Trailer Park | CA1900868 | CWS | Agoura Hills | 35 | Los Angeles County |
| Riverside Crossing Mhp | CA5200531 | CWS | Los Molinos | 41 | Tehama County |
| Riverside Csd | CA1200518 | CWS | Ferndale | 333 | Humboldt County |
| Riverside Mobile Home Park | CA3900762 | CWS | Vacaville | 55 | San Joaquin County |
| Riverstone/Rootcreek Water District | CA2010016 | CWS | Fresno | 10,276 | Madera County |
| Riverview Farms Ws | CA2700032 | NTNCWS | Salinas | 40 | Monterey County |
| Riverview Homeowners Association | CA1502750 | CWS | Bakersfield | 40 | Kern County |
| Riverview Mobile Home Estates | CA5000090 | CWS | Santa Cruz | 540 | Stanislaus County |
| Riverview Mobile Home Park | CA0707553 | CWS | Sacramento | 126 | Contra Costa County |
| Riverview School | CA1000196 | NTNCWS | Reedley | 536 | Fresno County |
| Riverview Water Association | CA0707577 | CWS | Bethel Island | 230 | Contra Costa County |
| Robert Young Family Limited Partner | CA4901459 | NTNCWS | Geyserville | 28 | Sonoma County |
| Roberts Ferry School Cafeteria | CA5000155 | NTNCWS | Waterford | 100 | Stanislaus County |
| Robin Way Water System | CA4900913 | CWS | Fairfield | 66 | Sonoma County |
| Robinson'S Corner Mhp | CA0400021 | CWS | Long Beach | 20 | Butte County |
| Robley Property Mws | CA2701822 | CWS | Salinas | 92 | Monterey County |
| Rock Creek Mutual Water Co. | CA0800529 | CWS | Crescent City | 60 | Del Norte County |
| Rockford School | CA5400884 | NTNCWS | Porterville | 321 | Tulare County |
| Rockwell Collins Inc. (Fka Upco-Utas) | CA4800596 | NTNCWS | Fairfield | 510 | Solano County |
| Rockwood Estates Mutual Water Company | CA4301013 | CWS | Morgan Hill | 28 | Santa Clara County |
| Rocky Comfort Mutual Water Co | CA3600209 | CWS | Mentone | 130 | San Bernardino County |
| Rod Mclellan Botanicals Ws | CA2702293 | NTNCWS | Aromas | 69 | Monterey County |
| Rodriguez Mhp | 090600040 | CWS | Coachella | 45 | |
| Roederer Estate Winery | CA2300907 | NTNCWS | Philo | 25 | Mendocino County |
| Rogina Water Company Inc. | CA2310002 | CWS | Talmage | 2,554 | Mendocino County |
| Rolling Acres Mutual Water Company | CA5700707 | CWS | Davis | 40 | Yolo County |
| Rolling Green Utilities, Inc. | CA1400010 | CWS | Big Pine | 940 | Inyo County |
| Rolling Hills Mutual Water Company | CA4200851 | CWS | Orcutt | 66 | Santa Barbara County |
| Rolling Hills Nut Company | CA5000607 | NTNCWS | Hickman | 45 | Stanislaus County |
| Rolling Hills Rancho Wa | CA2700713 | CWS | Salinas | 185 | Monterey County |
| Rolling Oaks Road Association | CA4900846 | CWS | Rohnert Park | 25 | Sonoma County |
| Rombauer Vineyards | CA2801033 | NTNCWS | St. Helena | 50 | Napa County |
| Roosevelt Elementary School | CA1000208 | NTNCWS | Fresno | 580 | Fresno County |
| Rosa Morada Mutual Water Company | CA3500549 | CWS | Hollister | 69 | San Benito County |
| Rosamond School Water System | CA1502231 | NTNCWS | Rosamond | 940 | Kern County |
| Rosario Park | CA4200579 | CWS | Santa Barbara | 38 | Santa Barbara County |
| Rosecrest Mutual | CA3100538 | CWS | Roseville | 31 | Placer County |
| Rosehart Industrial Park Ws | CA2702121 | NTNCWS | Salinas | 28 | Monterey County |
| Roseland Mobile Home Park | CA4900675 | CWS | San Juan Capistrano | 130 | Sonoma County |
| Roseview Heights Mutual Water Company | CA4300562 | CWS | San Jose | 148 | Santa Clara County |
| Rough & Ready Village | CA2900530 | CWS | Stockton | 154 | Nevada County |
| Round Hill Winery | CA2801035 | NTNCWS | St. Helena | 100 | Napa County |
| Round Mountain Water Company | CA1500561 | CWS | Bakersfield | 50 | Kern County |
| Round Valley Admin. Complex | 090605128 | NTNCWS | Covelo | 100 | |
| Round Valley Agency | 090605073 | CWS | Covelo | 84 | Mendocino County |
| Round Valley Elementary School | CA2300830 | NTNCWS | Covelo | 289 | Mendocino County |
| Round Valley Health Clinic | 090605113 | NTNCWS | Covelo | 119 | |
| Round Valley Hidden Oaks Casino And Restaurant | 090605177 | NTNCWS | Covelo | 137 | |
| Round Valley High School | CA2300829 | NTNCWS | Covelo | 186 | Mendocino County |
| Round Valley Piner | 090605015 | CWS | Covelo | 409 | Mendocino County |
| Round Valley School | CA1400019 | NTNCWS | Bishop | 80 | Inyo County |
| Rountree Facility(Prev. Sheriff'S Rehab) | CA4400762 | CWS | Santa Cruz | 160 | Santa Cruz County |
| Royal Carrizo Hoa | CA3301588 | CWS | Palm Desert | 25 | Riverside County |
| Royal Oak Place Ws | CA2702388 | CWS | Royal Oaks | 60 | Monterey County |
| Royal Sierra Estates Ws | CA2700970 | CWS | Salinas | 36 | Monterey County |
| Rs Utilities Water System | CA1504012 | NTNCWS | San Jose | 25 | Kern County |
| Rubys Valley Care Home | CA1000200 | CWS | West Des Moines | 43 | Fresno County |
| Ruiz Mhp | 090600035 | CWS | Mecca | 46 | |
| Running Creek Casino Water System (Habematolel) | 090605000 | NTNCWS | Upper Lake | 960 | |
| Rural North Vacaville Water District | CA4810013 | CWS | Vacaville | 1,313 | Solano County |
| Rush Creek Lodge Water System | CA5500369 | NTNCWS | Tiburon | 40 | Tuolumne County |
| Rush Creek Mutual Water System | CA5301017 | CWS | Weaverville | 102 | Trinity County |
| Russian River Mutual Water Co. | CA4900665 | CWS | Healdsburg | 87 | Sonoma County |
| Russos Mobile Park | CA0707601 | CWS | Bethel Island | 110 | Contra Costa County |
| Ruth Lake Marina | CA5305003 | NTNCWS | Mad River | 202 | Trinity County |
| Ruth Lake Recreation Area | CA5305004 | NTNCWS | Mad River | 252 | Trinity County |
| Rutherford Hill Mutual Water | CA2800023 | NTNCWS | Rutherford | 232 | Napa County |
| Rutherford Hill Winery | CA2801084 | NTNCWS | Rutherford | 30 | Napa County |
| Ryel Family Trust | CA2400211 | NTNCWS | Merced | 59 | Merced County |
| S & T Mutual Water Company | CA4000523 | CWS | Los Osos | 591 | San Luis Obispo County |
| S & W Warehousing, Llc | CA4901273 | NTNCWS | Sonoma | 50 | Sonoma County |
| S M S Briners Inc | CA3901318 | NTNCWS | Sunol | 30 | San Joaquin County |
| Sa 14 Chuk Chanse Subdivision | CA2000724 | CWS | Madera | 100 | Madera County |
| Sable Offshore Corp Las Flores Canyon | CA4200743 | NTNCWS | Gaviota | 90 | Santa Barbara County |
| Sable Offshore Corp Popco | CA4200691 | NTNCWS | Gaviota | 30 | Santa Barbara County |
| Sac City Mobile Home Community Lp | CA3400296 | CWS | Sacramento | 350 | Sacramento County |
| Sacramento Rendering | CA3400425 | NTNCWS | Sacramento | 300 | Sacramento County |
| Sacramento River Rv Park | CA4500255 | CWS | Eugene | 80 | Shasta County |
| Saddleback Mutual Water Co. | CA5200645 | CWS | Cottonwood | 90 | Tehama County |
| Safari West | CA4901251 | NTNCWS | Santa Rosa | 99 | Sonoma County |
| Sahara Mobile Court | CA3900964 | CWS | Pleasanton | 300 | San Joaquin County |
| Saint Andrews Abbey | CA1900057 | NTNCWS | Valyermo | 210 | Los Angeles County |
| Saint Francis Winery-Wild Oak Vineyards | CA4901255 | NTNCWS | Santa Rosa | 50 | Sonoma County |
| Saint Marie Mobile Home Park | CA4200842 | CWS | Irvine | 320 | Santa Barbara County |
| Sakata Seed Woodland Station | CA5700758 | NTNCWS | Woodland | 80 | Yolo County |
| Salmon Creek Middle School | CA4901168 | NTNCWS | Occidental | 300 | Sonoma County |
| Salyer Heights W.S., Inc | CA5304502 | CWS | Salyer | 130 | Trinity County |
| Salyer Mutual Wc (Formerly Riverview Ac) | CA5304501 | CWS | Salyer | 231 | Trinity County |
| San Andreas Mutual Water Co | CA4400558 | CWS | La Selva Beach | 392 | Santa Cruz County |
| San Antonio Canyon Msc | CA3610082 | CWS | Mt. Baldy | 119 | Los Angeles County, San Bernardino County |
| San Antonio School District Ws | CA2700727 | NTNCWS | Lockwood | 300 | Monterey County |
| San Ardo Wd | CA2700728 | CWS | San Ardo | 575 | Monterey County |
| San Augustin Mutual Water Company | CA4200714 | CWS | Gaviota | 43 | Santa Barbara County |
| San Benito County Water District | CA3510007 | CWS | Hollister | 0 | San Benito County |
| San Bernardino Valley Wd | CA3610019 | CWS | San Bernardino | 109,608 | Riverside County, San Bernardino County |
| San Cayetano Mutual Water Co | CA5601116 | CWS | Fillmore | 109 | Ventura County |
| San Diego County Water Authority | CA3710042 | CWS | San Diego | 0 | San Diego County |
| San Felipe Water System | 090600115 | CWS | Santa Ysabel | 52 | |
| San Jerardo Coop Ws | CA2701904 | CWS | Salinas | 249 | Monterey County |
| San Joaquin County - Colonial Heights | CA3910002 | CWS | Stockton | 1,841 | San Joaquin County |
| San Joaquin County - Thornton | CA3910009 | CWS | Stockton | 964 | San Joaquin County |
| San Joaquin County - Wilkinson Manor | CA3910024 | CWS | Stockton | 851 | San Joaquin County |
| San Joaquin County-Raymus Village | CA3910014 | CWS | Stockton | 1,086 | San Joaquin County |
| San Joaquin Estates Mutual Water Company | CA1500575 | CWS | Bakersfield | 165 | Kern County |
| San Joaquin Valley National Cemetery | CA2400200 | NTNCWS | Santa Nella | 25 | Merced County |
| San Joaquin Water Works #2 | CA3901092 | CWS | Stockton | 310 | San Joaquin County |
| San Joaquin Wine Company | CA2000920 | NTNCWS | Madera | 90 | Madera County |
| San Juan Bautista, City Of | CA3510002 | CWS | San Juan Bautista | 2,335 | San Benito County |
| San Juan Rd Ws #01 | CA2700733 | CWS | Aromas | 49 | Monterey County |
| San Juan Vista | CA3901215 | CWS | Stockton | 201 | San Joaquin County |
| San Justo Mutual Water Company | CA3500550 | CWS | Hollister | 166 | San Benito County |
| San Lucas County Water District | CA2701676 | CWS | San Lucas | 315 | Monterey County |
| San Luis Hills | CA2400209 | CWS | Los Banos | 221 | Merced County |
| San Marcos Mutual Water Company | CA4200580 | CWS | Santa Barbara | 120 | Santa Barbara County |
| San Martin County Water District | CA4300542 | CWS | San Martin | 627 | Santa Clara County |
| San Martin Foothills Water Company | CA4300638 | CWS | San Martin | 145 | Santa Clara County |
| San Miguel Community Services District | CA4010010 | CWS | San Miguel | 3,019 | San Luis Obispo County |
| San Miguel Ws #01 | CA2700738 | CWS | Royal Oaks | 100 | Monterey County |
| San Miguel Ws #03 | CA2700740 | CWS | Royal Oaks | 45 | Monterey County |
| San Miguel Ws #22 | CA2702073 | CWS | Salinas | 93 | Monterey County |
| San Miguelito Mwc | CA4010003 | CWS | Avila Beach | 1,600 | San Luis Obispo County |
| San Pasqual Academy | CA3700968 | CWS | Spring Valley | 298 | San Diego County |
| San Pasqual District A | 090605017 | CWS | Valley Center | 1,225 | San Diego County |
| San Pasqual District B | 090605080 | CWS | Valley Center | 705 | San Diego County |
| San Simeon Csd | CA4000568 | CWS | San Simeon | 462 | San Luis Obispo County |
| San Vicente Mwc | CA2702466 | CWS | Soledad | 69 | Monterey County |
| San Vicente Water Company | CA4210005 | CWS | Santa Barbara | 408 | Santa Barbara County |
| San Ysidro Health - Mhfm | CA3705073 | NTNCWS | Campo | 30 | San Diego County |
| San-I-Pak Inc | CA3901378 | NTNCWS | Tracy | 25 | San Joaquin County |
| Sandmound Mutual | CA0707556 | CWS | Bethel Island | 100 | Contra Costa County |
| Sandoval Mhp | 090600026 | CWS | Thermal | 38 | |
| Sandy Creek Village Mhp | CA1000260 | CWS | Madera | 89 | Fresno County |
| Sandy Point Mobile Home Park | CA0707597 | CWS | Bethel Island | 67 | Contra Costa County |
| Santa Anita Mutual Water Company | CA4200678 | CWS | Gaviota | 38 | Santa Barbara County |
| Santa Clara Resources | CA5603117 | NTNCWS | Carpinteria | 30 | Ventura County |
| Santa Clara School | CA5601405 | NTNCWS | Santa Paula | 39 | Ventura County |
| Santa Clara Valley Medical Center | CA4300833 | NTNCWS | San Jose | 3,000 | Santa Clara County |
| Santa Clara Valley Water District | CA4310027 | CWS | San Jose | 0 | Santa Clara County, Santa Cruz County |
| Santa Cruz County Fairgrounds | CA4400725 | NTNCWS | Watsonville | 50 | Santa Cruz County |
| Santa Cruz Waldorf School | CA4400875 | NTNCWS | Santa Cruz | 190 | Santa Cruz County |
| Santa Lucia Preserve Ws | CA2702521 | CWS | Carmel | 524 | Monterey County |
| Santa Margarita Ranch Headquarters | CA4000842 | NTNCWS | San Luis Obispo | 62 | San Luis Obispo County |
| Santa Nella County Water District | CA2410018 | CWS | Santa Nella | 2,211 | Merced County |
| Santa Rita Water | CA4200822 | CWS | Lompoc | 66 | Santa Barbara County |
| Santa Rosa Golf & Country Club | CA4900878 | NTNCWS | Santa Rosa | 250 | Sonoma County |
| Santa Rosa Mobile Estates | CA4900796 | CWS | San Leandro | 420 | Sonoma County |
| Santa Rosa Rancheria | 090600148 | CWS | Lemoore | 1,000 | Kings County |
| Santa Rosa Reservation | 090605019 | CWS | Anza | 205 | Riverside County |
| Santa Teresa Meadows Water Company | CA4300760 | CWS | Coyote | 68 | Santa Clara County |
| Santa Ynez Rancho Estates | CA4200619 | CWS | Santa Ynez | 304 | Santa Barbara County |
| Santa Ynez Roblar Mobile Home Park | CA4200827 | CWS | La Canada | 25 | Santa Barbara County |
| Santa Ysabel Enterprise System | 090600054 | NTNCWS | Santa Ysabel | 510 | San Diego County |
| Santa Ysabel Main | 090600150 | CWS | Santa Ysabel | 325 | San Diego County |
| Santa Ysabel Ranch Mwc | CA4000802 | CWS | San Luis Obispo | 344 | San Luis Obispo County |
| Santos Ranch Pws #5-Csa #35 | CA3901216 | CWS | Stockton | 320 | San Joaquin County |
| Saputo Dairy Food Usa | CA5403118 | NTNCWS | Tulare | 165 | Tulare County |
| Saputo Dairy Foods Usa, Llc | CA2400055 | NTNCWS | Gustine | 318 | Merced County |
| Saratoga Heights Mutual Water Company | CA4300545 | CWS | Saratoga | 258 | Santa Clara County |
| Saticoy Country Club-City Of Ventura | CA5602140 | CWS | Ventura | 196 | Ventura County |
| Saucelito Elementary School | CA5400558 | NTNCWS | Terra Bella | 91 | Tulare County |
| Saviers Road Mutual Water Co | CA5602115 | CWS | Port Hueneme | 368 | Ventura County |
| Sbdno County Service Area 70 Cedar Glen | CA3610026 | CWS | San Bernardino | 1,240 | San Bernardino County |
| Sce Bishop Creek Plant 4 | CA1400078 | CWS | Rosemead | 35 | Inyo County |
| Sce Bishop Creek Plant 5 | CA1410801 | NTNCWS | Rosemead | 43 | Inyo County |
| Sce/Big Creek Powerhouse 1 | CA1009111 | CWS | Rosemead | 104 | Fresno County |
| Scheid Vineyard Ws | CA2702539 | NTNCWS | Greenfield | 105 | Monterey County |
| Schelby School | CA2400113 | NTNCWS | Merced | 290 | Merced County |
| Schramsberg Winery | CA2801036 | NTNCWS | Calistoga | 65 | Napa County |
| Schulte Road Warehouse 3, Llc Wtr Sys | CA3902181 | NTNCWS | Tracy | 110 | San Joaquin County |
| Schweikart Water System | CA1502545 | CWS | Bakersfield | 27 | Kern County |
| Sconza Candy Company | CA5000179 | NTNCWS | Oakdale | 170 | Stanislaus County |
| Scotia Csd | CA1210010 | CWS | Scotia | 681 | Humboldt County |
| Seafair Road And Water Company | CA2300609 | CWS | Mendocino | 50 | Mendocino County |
| Searles Valley Minerals Operations Inc | CA3610854 | CWS | Trona | 1,818 | San Bernardino County |
| Seaside Municipal Water System | CA2710018 | CWS | Seaside | 2,800 | Monterey County |
| Seawood Estates Mutual Water Company | CA1200588 | CWS | Trinidad | 63 | Humboldt County |
| Sebastopol Charter School | CA4901436 | NTNCWS | Sebastopol | 310 | Sonoma County |
| Seeley Cwd | CA1310013 | CWS | Seeley | 1,729 | Imperial County |
| Seghesio Farms | CA4901266 | NTNCWS | Healdsburg | 38 | Sonoma County |
| Segura'S Rv Park Llc | CA1100254 | CWS | Newcastle | 20 | Glenn County |
| Select Harvest Usa, Llc | CA2400339 | NTNCWS | Turlock | 120 | Merced County |
| Selma High School | CA1000367 | NTNCWS | Selma | 2,225 | Fresno County |
| Sendero Ranch | CA3200221 | NTNCWS | Portola | 25 | Plumas County |
| Seneca Family Of Agencies | CA4901143 | NTNCWS | Oakland | 30 | Sonoma County |
| Senior Canyon Mutual Water Co | CA5601117 | CWS | Ojai | 800 | Ventura County |
| Senior Care Villa Water | CA3106937 | NTNCWS | Loomis | 30 | Placer County |
| Sensient Natural Ingredients Llc | CA2400013 | NTNCWS | Turlock | 410 | Merced County |
| Sequoia Bible Fellowship | CA1000583 | NTNCWS | Squaw Valley | 39 | Fresno County |
| Sequoia Grove Vineyards | CA2801037 | NTNCWS | Napa | 25 | Napa County |
| Sequoia Union Elementary School | CA5400709 | NTNCWS | Lemon Cove | 400 | Tulare County |
| Sequoia Water Assoc | CA3400155 | CWS | Courtland | 54 | Sacramento County |
| Sereno Del Mar Water Company (Puc) | CA4900647 | CWS | Forestville | 375 | Sonoma County |
| Seville Water Company | CA5400550 | CWS | Visalia | 691 | Tulare County |
| Seymour'S Mutual Water System | CA5301201 | CWS | Trinity Center | 40 | Trinity County |
| Sfpuc-Pleasanton Wells | CA0110018 | CWS | Burlingame | 1 | Alameda County |
| Shackleford Creek Community Water System | 090605102 | CWS | Fort Jones | 80 | |
| Shaded Terrace Pws | CA3900720 | CWS | Stockton | 238 | San Joaquin County |
| Shadow Acres Mutual Water Company | CA1900301 | CWS | Palmdale | 450 | Los Angeles County |
| Shadow Mountain Mhp | CA4700803 | CWS | San Juan Capistrano | 126 | Siskiyou County |
| Shady Grove Mobile Home Park, Llc | CA5400529 | CWS | Ventura | 95 | Tulare County |
| Shady Lake Water Association | CA2900511 | CWS | North San Juan | 90 | Nevada County |
| Shady Oaks Mobile Home Park Llc | CA2000828 | CWS | Fresno | 23 | Madera County |
| Shady Rest Trailer Court | CA3900755 | CWS | Danville | 150 | San Joaquin County |
| Shaffer Elementary School | CA1800575 | NTNCWS | Litchfield | 250 | Lassen County |
| Shamrock Mobile Home Park | CA4900723 | CWS | Santa Rosa | 188 | Sonoma County |
| Shanel Tribal Utility District | 090600133 | CWS | Hopland | 250 | Sonoma County |
| Sharondale Mesa Hoa | CA3301879 | CWS | Calimesa | 340 | Riverside County |
| Shasta C.S.D. | CA4510013 | CWS | Shasta | 3,069 | Shasta County |
| Shasta Cascade Mobilehome Park | CA4700627 | CWS | Honolulu | 100 | Siskiyou County |
| Shasta Co Csa # 13 Alpine Meadows | CA4500314 | CWS | Redding | 109 | Shasta County |
| Shasta Co Csa # 8 Palo Cedro | CA4500313 | CWS | Redding | 261 | Shasta County |
| Shasta Csa - Castella, #3 | CA4500015 | CWS | Redding | 333 | Shasta County |
| Shasta Csa - Cragview, #23 | CA4500028 | CWS | Redding | 248 | Shasta County |
| Shasta Csa - French Gulch, #11 | CA4500317 | CWS | Redding | 419 | Shasta County |
| Shasta Csa - Jones Valley, #6 | CA4510004 | CWS | Redding | 2,006 | Shasta County |
| Shasta Csa - Sugarloaf, #2 | CA4500006 | CWS | Redding | 274 | Shasta County |
| Shasta Forest Village M.W.C. | CA4510009 | CWS | Shingletown | 750 | Shasta County |
| Shasta Horizon Mobile Home Park | CA4700541 | CWS | Sacramento | 55 | Siskiyou County |
| Shasta View Heights Owners Association | CA4700630 | CWS | Yreka | 48 | Siskiyou County |
| Shasta-Sustainable Resource Management | CA4500037 | NTNCWS | Anderson | 45 | Shasta County |
| Shastina Mobile Estates | CA4700884 | CWS | Roseville | 32 | Siskiyou County |
| Shaver Lake Heights Mwc | CA1010053 | CWS | Clovis | 616 | Fresno County |
| Shaver Lake Heights Water Assn | CA1000069 | CWS | Prather | 25 | Fresno County |
| Sheridan Road Mutual Water Association | CA4000623 | NTNCWS | Arroyo Grande | 38 | San Luis Obispo County |
| Sherwood Forest Mhp | CA1000247 | CWS | Sanger | 60 | Fresno County |
| Sherwood Mobile Home Park | CA1900907 | CWS | Lancaster | 540 | Los Angeles County |
| Shiloh School District | CA5000295 | NTNCWS | Modesto | 105 | Stanislaus County |
| Shoei Foods (Usa), Inc. | CA5800909 | NTNCWS | Olivehurst | 50 | Yuba County |
| Shorelands Road & Water Company | CA2300545 | CWS | Mendocino | 78 | Mendocino County |
| Sid - Blue Ridge Oaks | CA4810024 | CWS | Vacaville | 63 | Solano County |
| Sid - Elmira | CA4810011 | CWS | Vacaville | 290 | Solano County |
| Sid - Gibson Canyon | CA4810010 | CWS | Vacaville | 535 | Solano County |
| Sid - Peabody | CA4810026 | CWS | Vacaville | 56 | Solano County |
| Sid - Pleasant Hills Ranch | CA4810025 | CWS | Vacaville | 89 | Solano County |
| Sid - Quail Canyon | CA4810012 | CWS | Vacaville | 132 | Solano County |
| Sierra Army Depot | CA1810700 | NTNCWS | Herlong | 1,200 | Lassen County |
| Sierra Bella Mutual Water Company | CA1500341 | CWS | Wofford Heights | 30 | Kern County |
| Sierra Breeze Mutual Water Company | CA1500447 | CWS | Inyokern | 199 | Kern County |
| Sierra Cascade Nursery | CA1805005 | NTNCWS | Susanville | 55 | Lassen County |
| Sierra Cedars Csd | CA1010052 | CWS | Shaver Lake | 250 | Fresno County |
| Sierra City Water Works, Inc. | CA4600056 | CWS | Grass Valley | 250 | Sierra County |
| Sierra Co. W.W.D #1 Calpine | CA4600019 | CWS | Calpine | 182 | Sierra County |
| Sierra Csa #5, Sierra Brooks | CA4600009 | CWS | Downieville | 726 | Sierra County |
| Sierra East Hoa | CA2600622 | CWS | Coleville | 84 | Mono County |
| Sierra Enterprise Elementary School | CA3400251 | NTNCWS | Sacramento | 643 | Sacramento County |
| Sierra Estates Mutual Water Company | CA2900548 | CWS | Penn Valley | 100 | Nevada County |
| Sierra Family Medical Clinic | CA2900330 | NTNCWS | Nevada City | 35 | Nevada County |
| Sierra Gold Nurseries | CA5103015 | NTNCWS | Yuba City | 100 | Sutter County |
| Sierra Grande Estates Mutual Water Co. | CA1400070 | CWS | Bishop | 138 | Inyo County |
| Sierra High School | CA1000280 | NTNCWS | Tollhouse | 720 | Fresno County |
| Sierra Highland Csd | CA1400007 | CWS | Bishop | 600 | Inyo County |
| Sierra King Homeowners Assn | CA5400940 | CWS | Three Rivers | 124 | Tulare County |
| Sierra Lakes County Water Dist | CA3110017 | CWS | Truckee | 210 | Placer County |
| Sierra Linda Mutual Water Co | CA2000506 | CWS | North Fork | 200 | Madera County |
| Sierra Meadows | CA1502564 | CWS | Kernville | 68 | Kern County |
| Sierra Moon Mutual Water Company | CA0409183 | CWS | Chico | 330 | Butte County |
| Sierra Mutual Water Company | CA5403110 | CWS | Porterville | 47 | Tulare County |
| Sierra Nevada Brewing Co. | CA0409197 | NTNCWS | Chico | 400 | Butte County |
| Sierra North Community Service District | CA1400109 | CWS | Bishop | 42 | Inyo County |
| Sierra Outdoor School | CA5500171 | NTNCWS | Sonora | 39 | Tuolumne County |
| Sierra Pacific Ind - Anderson | CA4500191 | NTNCWS | Shasta Lake | 250 | Shasta County |
| Sierra Pacific Industries | CA5500360 | NTNCWS | Chinese Camp | 144 | Tuolumne County |
| Sierra Pacific Industries - Red Bluff Mi | CA5201057 | NTNCWS | Red Bluff | 450 | Tehama County |
| Sierra Pacific Industries - Richfield | CA5201055 | NTNCWS | Corning | 350 | Tehama County |
| Sierra Pacific Industries - Windows | CA5201143 | NTNCWS | Red Bluff | 350 | Tehama County |
| Sierra Pacific Industries Quincy | CA3200141 | NTNCWS | Quincy | 315 | Plumas County |
| Sierra Park Water Company Inc. | CA5510016 | CWS | Mi-Wuk Village | 100 | Tuolumne County |
| Sierra Pines Mobile Home Park | CA0202522 | CWS | South Lake Tahoe | 70 | Alpine County, Nevada County |
| Sierra Twain Harte Mhp | CA5500096 | CWS | Jamestown | 129 | Tuolumne County |
| Sierra View Jr Academy | CA5400711 | NTNCWS | Exeter | 121 | Tulare County |
| Sierra View School | CA2000846 | NTNCWS | Madera | 250 | Madera County |
| Sierra Village Mobile Home Park | CA5500353 | CWS | Mi Wuk Village | 21 | Tuolumne County |
| Sierra Village Mutual Water Co | CA5500074 | CWS | Twain Harte | 264 | Tuolumne County |
| Sierra Vista Association | CA5400964 | CWS | Clovis | 43 | Tulare County |
| Sierra Waldorf School | CA5500242 | NTNCWS | Jamestown | 175 | Tuolumne County |
| Sierra Water Resources - Sierra City | CA4600017 | CWS | Claremont | 324 | Sierra County |
| Sierraville P.U.D. | CA4600018 | CWS | Sierraville | 200 | Sierra County |
| Siesta Mobile Home Park | CA5602109 | CWS | Oxnard | 160 | Ventura County |
| Siete Robles Mutual Water Co | CA5601119 | CWS | Ojai | 323 | Ventura County |
| Silver Dollar Fairgrounds | CA0405003 | NTNCWS | Chico | 195 | Butte County |
| Silver Oak Wine Cellars | CA2801038 | NTNCWS | Healdsburg | 167 | Napa County |
| Silver Oak Wine Cellars Llc | CA4901374 | NTNCWS | Healdsburg | 33 | Sonoma County |
| Silverado Vineyards | CA2801041 | NTNCWS | Rutherford | 100 | Napa County |
| Silverado Water System | CA3400452 | NTNCWS | Sacramento | 40 | Sacramento County |
| Silverfork School | CA0900304 | NTNCWS | Pollock Pines | 25 | El Dorado County |
| Sisar Mutual Water Co | CA5601120 | CWS | Santa Paula | 363 | Ventura County |
| Siskiyou Co. Rolling Hills Mwc | CA4700528 | CWS | Yreka | 300 | Siskiyou County |
| Siskiyou Co.Service Area #5/Carrick | CA4700521 | CWS | Weed | 143 | Siskiyou County |
| Siskiyou Forest Products | CA4500035 | NTNCWS | Anderson | 40 | Shasta County |
| Siskiyou Lake Highlands Mwc | CA4700880 | CWS | Mt. Shasta | 310 | Siskiyou County |
| Sisquoc | CA4200560 | CWS | Santa Maria | 137 | Santa Barbara County |
| Six Acres Water Company | CA4900608 | CWS | San Francisco | 66 | Sonoma County |
| Sj County-Redwood School | CA3900978 | NTNCWS | Stockton | 83 | San Joaquin County |
| Sjc Micke Grove Park | CA3900511 | NTNCWS | Lod | 25 | San Joaquin County |
| Skp Park Of The Sierras Inc | CA2000832 | CWS | Coarsegold | 130 | Madera County |
| Sky Acres Mutual Water Corp | CA2000524 | CWS | Oakhurst | 175 | Madera County |
| Sky Forest Mwc | CA3600258 | CWS | Sky Forest | 492 | San Bernardino County |
| Sky View County Water | CA5200562 | CWS | Paynes Creek | 429 | Tehama County |
| Skylawn Memorial Park (Skylawn Inc) | CA4100605 | NTNCWS | San Mateo | 50 | San Mateo County |
| Skyline Park | CA4200616 | CWS | Santa Ynez | 295 | Santa Barbara County |
| Skywalker Ranch | CA2100566 | NTNCWS | Nicasio | 250 | Marin County |
| Sleepy Valley Water Company | CA1900903 | CWS | Santa Clarita | 160 | Los Angeles County |
| Slide Inn Snowbowl Water Co | CA5500077 | CWS | Sonora | 417 | Tuolumne County |
| Slo Csa No. 10 - Cayucos Wtp | CA4010025 | CWS | San Luis Obispo | 0 | San Luis Obispo County |
| Slo Csa No. 16 - Shandon | CA4010028 | CWS | San Luis Obispo | 1,085 | San Luis Obispo County |
| Slo Cwwd No. 23 - Santa Margarita | CA4010024 | CWS | San Luis Obispo | 1,291 | San Luis Obispo County |
| Slo Partners | CA4000753 | NTNCWS | Pismo Beach | 40 | San Luis Obispo County |
| Slocsa #10A - Cayucos | CA4010901 | CWS | San Luis Obispo | 1,200 | San Luis Obispo County |
| Smiley Park Country Club | CA3600260 | CWS | Running Springs | 370 | San Bernardino County |
| Smith River C.S.D. | CA0810002 | CWS | Smith River | 2,568 | Del Norte County |
| Smwd - Sj Ground Water Plant | CA3010120 | CWS | Rancho Santa Margarita | 0 | Orange County |
| Smwd-Nichols Institute | CA3000980 | NTNCWS | Rancho Santa Margarita | 1,600 | Orange County |
| Snelling Merced Falls School | CA2400062 | NTNCWS | Snelling | 69 | Merced County |
| Snow Summit | CA3600707 | NTNCWS | Big Bear Lake | 75,500 | San Bernardino County |
| Snowcrest Heights Imp Assoc | CA3600262 | CWS | Mount Baldy | 403 | Los Angeles County, San Bernardino County |
| Snowshoe Springs Assn. | CA0510011 | CWS | Stockton | 686 | Calaveras County |
| Snug Harbor Rv Lp | CA4800561 | CWS | Walnut Grove | 24 | Solano County |
| So Trinity Unified School Dist. | CA5305107 | NTNCWS | Bridgeville | 100 | Trinity County |
| Soboba | 090600151 | CWS | San Jacinto | 3,000 | Riverside County |
| Sobre Vista Water Company | CA4900901 | CWS | El Verano | 80 | Sonoma County |
| Solano Verde Mutual Water Co | CA5602130 | CWS | Camarillo | 100 | Ventura County |
| Soledad Mountain Project Water System | CA1503664 | NTNCWS | Mojave | 250 | Kern County |
| Somerston Winery | CA2800015 | NTNCWS | St. Helena | 28 | Napa County |
| Son Shine Properties | CA1500588 | CWS | Edison | 438 | Kern County |
| Sonoma County Csa 41-Fitch Mountain | CA4910010 | CWS | Santa Rosa | 1,115 | Sonoma County |
| Sonoma County Csa 41-Freestone | CA4900549 | CWS | Santa Rosa | 90 | Sonoma County |
| Sonoma County Csa 41-Jenner | CA4900532 | CWS | Santa Rosa | 406 | Sonoma County |
| Sonoma County Csa 41-Salmon Creek | CA4900543 | CWS | Santa Rosa | 327 | Sonoma County |
| Sonoma County Mutual Water Company | CA4900640 | CWS | San Francisco | 40 | Sonoma County |
| Sonoma County Pub Works-Central Landfill | CA4901212 | NTNCWS | Petaluma | 34 | Sonoma County |
| Sonoma County Water Agency | CA4910020 | CWS | Santa Rosa | 0 | Sonoma County |
| Sonoma Mountain County Water District | CA4900580 | CWS | Santa Rosa | 185 | Sonoma County |
| Sonoma Ranch Mutual Water Company | CA4900843 | CWS | Hercules | 151 | Sonoma County |
| Sonoma Springs | CA4900533 | CWS | Glen Ellen | 37 | Sonoma County |
| Sonoma Warehousing | CA4901061 | NTNCWS | Sonoma | 200 | Sonoma County |
| Sonoma West Holdings Industrial Park | CA4901250 | NTNCWS | Sebastopol | 25 | Sonoma County |
| Sonoma West Holdings North Plant | CA4900859 | NTNCWS | Sebastopol | 50 | Sonoma County |
| Sonora Estates Mobile Home Park | CA5500086 | CWS | Yorba Linda | 235 | Tuolumne County |
| Sonora Meadows Mutual Wtr Co | CA5510023 | CWS | Sonora | 1,123 | Tuolumne County |
| Sonora Water Resources, Inc | CA5510024 | CWS | Claremont | 785 | Tuolumne County |
| Soults Pump & Equipment Company | CA5403208 | NTNCWS | Tulare | 31 | Tulare County |
| South Campo | 090600059 | CWS | Campo | 63 | |
| South Cloverdale Water Company | CA4900510 | CWS | Cloverdale | 90 | Sonoma County |
| South County Retirement Home | CA4300832 | CWS | San Martin | 46 | Santa Clara County |
| South Desert Mutual Water Company | CA1502619 | CWS | Inyokern | 26 | Kern County |
| South Feather W&P - Bangor | CA0410012 | CWS | Oroville | 73 | Butte County |
| South Fork Elementary School Water Sys | CA1502260 | NTNCWS | Weldon | 154 | Kern County |
| South Fork Estates Mutual Water Co | CA5403113 | CWS | Three Rivers | 106 | Tulare County |
| South Fork Middle School | CA1503368 | NTNCWS | Weldon | 204 | Kern County |
| South Kaweah Mutual Water Company | CA5400754 | CWS | Three Rivers | 384 | Tulare County |
| South Kern Industrial Center | CA1503232 | NTNCWS | Taft | 45 | Kern County |
| South Kern Mutual Water Company | CA1500344 | CWS | Clovis | 32 | Kern County |
| South Midway City Mutual Water Co. | CA3000825 | CWS | Huntington Beach | 891 | Orange County |
| South Mountain Mutual Water Co | CA5601141 | CWS | Santa Paula | 58 | Ventura County |
| South San Joaquin Irrigation District | CA5010040 | CWS | Ripon | 0 | San Joaquin County, Stanislaus County |
| South Valley Farms-Beech Huller/Office | CA1503384 | NTNCWS | Wasco | 75 | Kern County |
| Southside Elementary School | CA3500521 | NTNCWS | Hollister | 300 | San Benito County |
| Southwest Tract W M D [Sws] | CA3400156 | CWS | Sacramento | 103 | Sacramento County |
| Southwest Transportation Agency | CA1000562 | NTNCWS | Caruthers | 25 | Fresno County |
| Spanish Flat Water District | CA2810014 | CWS | Napa | 92 | Napa County |
| Spanish Lakes Mutual Water Co | CA4000789 | CWS | Templeton | 125 | San Luis Obispo County |
| Spaulding Eagle Lake Mwc | CA1800534 | CWS | Susanville | 36 | Lassen County |
| Spca Ws | CA2702370 | NTNCWS | Monterey | 55 | Monterey County |
| Specialty Minerals Inc | CA3601155 | NTNCWS | Lucerne Valley | 67 | San Bernardino County |
| Speedling, Inc | CA4000208 | NTNCWS | Nipomo | 40 | San Luis Obispo County |
| Speedway Sonoma Llc | CA4901080 | NTNCWS | Sonoma | 33 | Sonoma County |
| Spence Rd Cultivation Ws | CA2700014 | NTNCWS | Salinas | 25 | Monterey County |
| Spence Rd Ws #05 | CA2701726 | NTNCWS | Salinas | 25 | Monterey County |
| Spencer Valley School District | CA3701005 | NTNCWS | Santa Ysabel | 40 | San Diego County |
| Spindrift Marina | CA3400169 | CWS | St. Helena | 100 | Sacramento County |
| Sportsmans Paradise | CA1300622 | CWS | Blythe | 138 | Imperial County |
| Spreckels Ln Ws #02 | CA2701679 | NTNCWS | Salinas | 31 | Monterey County |
| Spreckels Ln Ws #03 | CA2701912 | NTNCWS | Salinas | 45 | Monterey County |
| Spreckels Sugar Company | CA1300644 | NTNCWS | Brawley | 300 | Imperial County |
| Spring Canyon Wa | CA2700838 | CWS | Salinas | 90 | Monterey County |
| Spring Creek Estates Pws | CA3900927 | CWS | Stockton | 119 | San Joaquin County |
| Spring Mountain Mutual Water Company | CA1500566 | CWS | Woody | 26 | Kern County |
| Spring Valley Heights Association Inc | CA4300856 | CWS | Milpitas | 65 | Santa Clara County |
| Spring Valley School | CA0400065 | NTNCWS | Oroville | 100 | Butte County |
| Spring Valley School | CA2000607 | NTNCWS | North Fork | 150 | Madera County |
| Springville Pud | CA5410011 | CWS | Springville | 1,500 | Tulare County |
| Springwood Estates Mwc | CA3500575 | CWS | Hollister | 50 | San Benito County |
| Spv Water Company | CA1907028 | CWS | Valencia | 211 | Los Angeles County |
| St Francis Tract Water System | CA4400557 | CWS | Freedom | 118 | Santa Cruz County |
| St Josephs Hospital | CA3901082 | NTNCWS | Stockton | 150 | San Joaquin County |
| St Marys High School | CA3901209 | NTNCWS | Stockton | 953 | San Joaquin County |
| St Nicholas Ranch & Retreat | CA1000377 | NTNCWS | Squaw Valley | 123 | Fresno County |
| St. Clair Ranchos Mutual Water Co. | CA1500507 | CWS | Bakersfield | 105 | Kern County |
| St. Helena Purlieu Llc | CA2800741 | NTNCWS | St Helena | 25 | Napa County |
| St. Supery Winery | CA2801046 | NTNCWS | Rutherford | 40 | Napa County |
| Stafford Meat Company | CA3400456 | NTNCWS | Rio Linda | 32 | Sacramento County |
| Stags Leap Winery | CA2801086 | NTNCWS | Napa | 50 | Napa County |
| Stags Leap Wine Cellars | CA2801047 | NTNCWS | Napa | 44 | Napa County |
| Stanislaus Regional Water Authority | CA5010043 | CWS | Turlock | 0 | Stanislaus County |
| Stanislaus Union School Dist | CA5000249 | NTNCWS | Modesto | 390 | Stanislaus County |
| Starlite Community Service District | CA1400002 | CWS | Bishop | 241 | Inyo County |
| Starlite Pines Mutual Water Co Inc | CA4500195 | CWS | Shingletown | 500 | Shasta County |
| State Ready Mix, Inc. | CA5603122 | NTNCWS | Saticoy | 25 | Ventura County |
| Station House Inn | CA0900529 | NTNCWS | Sacramento | 30 | El Dorado County |
| Sterling Industrial | CA5000565 | NTNCWS | Modesto | 35 | Stanislaus County |
| Sterling Mutual Water Company | CA1910158 | CWS | El Monte | 198 | Los Angeles County |
| Sterling Vineyards | CA2800129 | NTNCWS | Calistoga | 500 | Napa County |
| Stinson Beach County Wtr Dist | CA2110004 | CWS | Stinson Beach | 583 | Marin County |
| Stockdale Annex Mutual Water | CA1500211 | CWS | Bakersfield | 433 | Kern County |
| Stockdale Mutual Water Co. | CA1500349 | CWS | Bakersfield | 200 | Kern County |
| Stockdale Ranchos Mutual Water Co | CA1500557 | CWS | Bakersfield | 313 | Kern County |
| Stocking Ranch Deepwell | CA4800767 | NTNCWS | Vacaville | 53 | Solano County |
| Stockton Baptist Church | CA3901387 | NTNCWS | Stockton | 76 | San Joaquin County |
| Stockton East Water District | CA3910006 | CWS | Stockton | 0 | San Joaquin County |
| Stockton Verde Mobile Home Park | CA3910020 | CWS | Stockton | 703 | San Joaquin County |
| Stoco Mutual Water Company | CA1500517 | NTNCWS | Bakersfield | 85 | Kern County |
| Stone Creek Water Company | CA3301011 | CWS | Palm Desert | 152 | Riverside County |
| Stonebridge Mutual Water Co | CA4300787 | CWS | Morgan Hill | 38 | Santa Clara County |
| Stonegate Mobile Home Park | CA4900795 | CWS | Los Angeles | 196 | Sonoma County |
| Stonepine Resort Ws | CA2702172 | NTNCWS | Carmel Valley | 66 | Monterey County |
| Stonestreet Winery | CA4901259 | NTNCWS | Geyserville | 55 | Sonoma County |
| Stonewood Canyon Estates | CA3301800 | CWS | Idyllwild | 40 | Riverside County |
| Strasbaugh, Inc | CA4000777 | NTNCWS | San Luis Obispo | 200 | San Luis Obispo County |
| Stratford Pud | CA1610006 | CWS | Hanford | 1,277 | Kings County |
| Strathmore Public Util Dist | CA5410012 | CWS | Strathmore | 2,669 | Tulare County |
| Stratos Way Water Company, Inc | CA5000474 | NTNCWS | Modesto | 135 | Stanislaus County |
| Strawberry Lodge Mwc | CA3600301 | CWS | Twin Peaks | 381 | San Bernardino County |
| Strawberry Rd Ws #06 | CA2700766 | CWS | Watsonville | 78 | Monterey County |
| Streeter Industrial Plaza | CA2900626 | NTNCWS | Auburn | 35 | Nevada County |
| Strickland Mutual Water Company | CA5602117 | CWS | Oxnard | 429 | Ventura County |
| Stripe N Seal | CA4901362 | NTNCWS | Santa Rosa | 26 | Sonoma County |
| Struve Rd Ws #02 | CA2700772 | CWS | Elverta | 166 | Monterey County |
| Suburban Water Systems-Covina Knolls | CA1910200 | CWS | Covina | 1,451 | Los Angeles County |
| Sugar Pine Homeowners Assoc | CA2000533 | CWS | Oakhurst | 120 | Madera County |
| Sugar Pine Rv Resort | CA5500115 | CWS | Twain Harte | 160 | Tuolumne County |
| Sullivan Mutual Water | CA4300571 | CWS | Morgan Hill | 53 | Santa Clara County |
| Sultana Community Services District | CA5400824 | CWS | Sultana | 983 | Tulare County |
| Summerfield Waldorf School | CA4900907 | NTNCWS | Santa Rosa | 301 | Sonoma County |
| Summerhill Mhp Ws | CA2700792 | CWS | Santa Cruz | 95 | Monterey County |
| Summit Industrial Park Water System | CA1503543 | NTNCWS | Tehachapi | 25 | Kern County |
| Summit Mutual Water Company | CA4400559 | CWS | Los Gatos | 152 | Santa Cruz County |
| Summit View Ranch Mutual Water Co. | CA4900892 | CWS | Santa Rosa | 45 | Sonoma County |
| Summit West Mutual Water Co. | CA4400617 | CWS | Los Gatos | 481 | Santa Cruz County |
| Sun Empire School | CA1000201 | NTNCWS | Kerman | 550 | Fresno County |
| Sun Maid Growers Of California | CA1000381 | NTNCWS | Madera | 750 | Fresno County |
| Sun Mountain M.W.C. | CA4700686 | CWS | Mt. Shasta | 109 | Siskiyou County |
| Sun Oaks Racquet Club | CA4500216 | NTNCWS | Redding | 71 | Shasta County |
| Sun Pacific - Tulare | CA5403031 | NTNCWS | Tulare | 301 | Tulare County |
| Sun Pacific Shippers - Delano | CA1504008 | NTNCWS | Bakersfield | 25 | Kern County |
| Sun Pacific Shippers Lp - Exeter | CA5402013 | NTNCWS | Exeter | 200 | Tulare County |
| Sun Pacific Shippers-Lerdo | CA1503182 | NTNCWS | Bakersfield | 175 | Kern County |
| Sun Pacific Shippers-Maricopa Water Sys. | CA1503515 | NTNCWS | Bakersfield | 100 | Kern County |
| Sun Valley Rice Company | CA0605007 | NTNCWS | Dunnigan | 104 | Colusa County |
| Sunbeam Lake Rv Resort | CA1300626 | CWS | El Centro | 650 | Imperial County |
| Sundale Mutual Water Company A, B | CA1900563 | CWS | Lancaster | 1,155 | Los Angeles County |
| Sundale Union School | CA5400714 | NTNCWS | Tulare | 930 | Tulare County |
| Sunland Village Mobile Home Park | CA1400144 | CWS | Crowley Lake | 29 | Inyo County |
| Sunny Acres Mws | CA2701589 | CWS | Chualar | 45 | Monterey County |
| Sunny Acres Preschool | CA5403131 | NTNCWS | Porterville | 50 | Tulare County |
| Sunny Road Water System | CA3901213 | CWS | El Monte | 34 | San Joaquin County |
| Sunnygem Juice Plant | CA1503671 | NTNCWS | Buttonwillow | 42 | Kern County |
| Sunnyside Convalescent Hosp | CA1000366 | CWS | Fresno | 107 | Fresno County |
| Sunnyside Estates Water System | CA3900714 | CWS | Stockton | 69 | San Joaquin County |
| Sunnyside Farms Mutual Water Company | CA1900146 | CWS | Palmdale | 436 | Los Angeles County |
| Sunrise Estates Mutual Water Company | CA3700277 | CWS | Jamul | 150 | San Diego County |
| Sunrise Mobilehome Park | CA4500104 | CWS | San Francisco | 37 | Shasta County |
| Sunrise Mountain Mutual Water Company | CA4900641 | CWS | Cazadero | 100 | Sonoma County |
| Sunrise Mutual Water Co. | CA5400881 | CWS | Visalia | 109 | Tulare County |
| Sunrise Shore Mutual Water Company | CA1700536 | CWS | Lower Lake | 83 | Lake County |
| Sunrise Village Mhp | CA5000095 | CWS | Scottsdale | 339 | Stanislaus County |
| Sunset Beach Mutual Water Co | CA4400599 | CWS | Watsonville | 182 | Santa Cruz County |
| Sunset Moulding Chico | CA0400150 | NTNCWS | Chico | 38 | Butte County |
| Sunset Park Community | CA4900794 | CWS | Santa Rosa | 157 | Sonoma County |
| Sunset Vista Estates Mhp | CA1600002 | CWS | Lemoore | 400 | Kings County |
| Sunset West Community Llc | CA1000378 | CWS | Seaside | 350 | Fresno County |
| Sunset West Mutual Water Company | CA0300055 | NTNCWS | Jackson | 25 | Amador County |
| Sunview Cold Storage Water System | CA1502581 | NTNCWS | Delano | 130 | Kern County |
| Superior Mutual Water Company | CA1503209 | NTNCWS | Bakersfield | 61 | Kern County |
| Superior Packing Co | CA4800615 | NTNCWS | Dixon | 156 | Solano County |
| Sure Fresh Produce | CA4200832 | NTNCWS | Santa Maria | 100 | Santa Barbara County |
| Surfwood Mutual Water Corporation | CA2300590 | CWS | Mendocino | 160 | Mendocino County |
| Surrey Village Water Co. Inc. | CA5200570 | CWS | Red Bluff | 163 | Tehama County |
| Susan Hills Estates Wc | CA1800529 | CWS | Susanville | 252 | Lassen County |
| Susan River Park Water Co. | CA1800503 | CWS | Westwood | 140 | Lassen County |
| Susanville Upper Rancheria | 090605150 | CWS | Susanville | 190 | Lassen County |
| Sutter Community S.D. | CA5110007 | CWS | Sutter | 2,904 | Sutter County |
| Sutter Home Winery | CA2800059 | NTNCWS | St. Helena | 244 | Napa County |
| Sutter Home Winery Inc. | CA3902180 | NTNCWS | St. Helena | 355 | San Joaquin County |
| Sutter Home Winery Inc. Trinchero Cc | CA4000841 | NTNCWS | St. Helena | 26 | San Luis Obispo County |
| Sutter Pines Mhp | CA0300011 | CWS | Sutter Creek | 40 | Amador County |
| Sutter Santa Rosa Regional Hospital | CA4901370 | NTNCWS | Santa Rosa | 1,000 | Sonoma County |
| Sweet Water Co-Op | CA1500591 | CWS | Inyokern | 47 | Kern County |
| Sweetwater Springs Cwd - Monte Rio | CA4910028 | CWS | Guerneville | 3,531 | Sonoma County |
| Sws Land Development Inc | CA2000951 | NTNCWS | Madera | 35 | Madera County |
| Syar Industries | CA2800580 | NTNCWS | Napa | 130 | Napa County |
| Sycamore Mineral Springs Resort | CA4000689 | NTNCWS | San Luis Obispo | 200 | San Luis Obispo County |
| Syngenta Seeds Llc | CA5700764 | NTNCWS | Woodland | 65 | Yolo County |
| Sysco Food Services Of Sacramento, Inc. | CA5105004 | NTNCWS | Pleasant Grove | 300 | Sutter County |
| T & A Onions | CA3500926 | NTNCWS | Salinas | 165 | San Benito County |
| Table Bluff (New) Reservation | 090605124 | CWS | Loleta | 230 | Humboldt County |
| Tahama Village Mobile Home Park | CA3900602 | CWS | Oakdale | 200 | San Joaquin County |
| Tahoe City Pud - Alpine Peaks | CA3110044 | CWS | Tahoe City | 214 | Placer County |
| Tahoe City Pud - Madden Creek | CA3110043 | CWS | Tahoe City | 397 | Placer County |
| Tahoe City Pud - Mckinney/Quail | CA3110011 | CWS | Tahoe City | 1,245 | Placer County |
| Tahoe City Pud - Rubicon | CA0910012 | CWS | Tahoe City | 1,384 | El Dorado County |
| Tahoe City Pud - Tahoe Cedars | CA3110013 | CWS | Tahoe City | 2,745 | El Dorado County, Placer County |
| Tahoe City Pud - Tahoe Swiss Village | CA3110042 | CWS | Tahoe City | 837 | Placer County |
| Tahoe City Pud - Timberland | CA3100029 | CWS | Tahoe City | 301 | Placer County |
| Tahoe Keys Water Company | CA0910015 | CWS | South Lake Tahoe | 1,420 | El Dorado County |
| Tahoe Park Water Co - Skyland/Nielsen | CA3110049 | CWS | Eldorado Hills | 50 | Placer County |
| Tahoe Park Water Company | CA3110018 | CWS | Eldorado Hills | 750 | Placer County |
| Tahoe Timber Trails | CA2900507 | NTNCWS | Truckee | 254 | Nevada County |
| Talley Farms Labor Housing | CA4000678 | NTNCWS | Arroyo Grande | 90 | San Luis Obispo County |
| Talley Transportation Inc | CA2000961 | NTNCWS | Madera | 35 | Madera County |
| Talmont Resort Improvement District | CA3110047 | CWS | Tahoe City | 300 | Placer County |
| Tamarron Mobile Home Park | CA5500193 | CWS | Newport Beach | 225 | Tuolumne County |
| Tank Farm Business Park | CA4000216 | NTNCWS | San Luis Obispo | 45 | San Luis Obispo County |
| Tarditi Rentals Water | CA3901442 | NTNCWS | Lodi | 27 | San Joaquin County |
| Tasco Spreckels Water Company | CA2710023 | CWS | Salinas | 672 | Monterey County |
| Tassajara Springs Ws | CA2701705 | CWS | Carmel Valley | 150 | Monterey County |
| Tavis Corporation | CA2210918 | NTNCWS | Mariposa | 50 | Mariposa County |
| Taylor Farms Retail, Inc. | CA3500913 | NTNCWS | San Juan Bautista | 1,055 | San Benito County |
| Tds California | CA5000494 | NTNCWS | Denair | 30 | Stanislaus County |
| Tecate Vista Mutual Water Company | CA3700953 | NTNCWS | Tecate | 204 | San Diego County |
| Teen Challenge | CA5403213 | CWS | Reedley | 130 | Fresno County, Tulare County |
| Tehachapi Cement Llc | CA1500050 | NTNCWS | Tehachapi | 115 | Kern County |
| Tehachapi Church Of The Nazarene | CA1502753 | NTNCWS | Tehachapi | 469 | Kern County |
| Teichert Construction | CA5700542 | NTNCWS | Sacramento | 35 | Yolo County |
| Teixeira Farms - Frontier Cooling | CA4200943 | NTNCWS | Santa Maria | 80 | Santa Barbara County |
| Tejon Ranch Grapevine Water | CA1500415 | NTNCWS | Lebec | 2,207 | Kern County |
| Tejon Ranch Main Headquarters | CA1500413 | CWS | Lebec | 132 | Kern County |
| Temalpakh Farm | 090605167 | NTNCWS | Coachella | 100 | Riverside County |
| Tennant C.S.D. | CA4700531 | CWS | Macdoel | 50 | Siskiyou County |
| Terra De Oro Water Company | CA4000749 | CWS | Arroyo Grande | 38 | San Luis Obispo County |
| Terra Linda Farms | CA1009222 | CWS | Riverdale | 79 | Fresno County |
| Terra Nova Mobile Home Park | CA1900721 | CWS | Rancho Cucamonga | 140 | Los Angeles County |
| Terrace View Water System | CA4901355 | CWS | Rohnert Park | 60 | Sonoma County |
| Terrace Water Company | CA3610048 | CWS | Colton | 2,400 | San Bernardino County |
| Terry School | CA1000198 | NTNCWS | Selma | 226 | Fresno County |
| Tesoro Viejo Master Mwc, Inc. | CA2010017 | CWS | San Jose | 4,660 | Madera County |
| Tessenderlo Kerley Inc | CA1000485 | NTNCWS | Phoenix | 50 | Fresno County |
| Teviston Community Services District | CA5400641 | CWS | Pixley | 403 | Tulare County |
| Texas Canyon Ranger Station | CA1900752 | NTNCWS | Arcadia | 30 | Los Angeles County |
| The Anne Sippi Clinic-Riverside Ranch | CA1503509 | CWS | Bakersfield | 51 | Kern County |
| The Fruit Yard Restaurant | CA5000154 | NTNCWS | Modesto | 43 | Stanislaus County |
| The Garlic Company | CA1503290 | NTNCWS | Shafter | 300 | Kern County |
| The Lakes Association | CA5400880 | CWS | Visalia | 495 | Tulare County |
| The Lodge At Sonoma | CA4901258 | NTNCWS | Sonoma | 300 | Sonoma County |
| The Maples | CA5700754 | NTNCWS | Woodland | 25 | Yolo County |
| The Morning Star Company | CA5000478 | NTNCWS | Newman | 200 | Stanislaus County |
| The Morning Star Packing Company | CA2400175 | NTNCWS | Los Banos | 50 | Merced County |
| The Painted Turtle Camp | CA1900074 | CWS | Lake Hughes | 57 | Los Angeles County |
| The Ranch At Live Oak | CA5602302 | NTNCWS | Malibu | 82 | Ventura County |
| The Ranch Winery | CA2801049 | NTNCWS | St. Helena | 200 | Napa County |
| The Rental Place | CA4901225 | NTNCWS | Sonoma | 30 | Sonoma County |
| The River Community | CA1900616 | CWS | Azusa | 35 | Los Angeles County |
| The Steward | CA4200741 | NTNCWS | 348 | Santa Barbara County | |
| The Village | CA2000573 | CWS | Coarsegold | 40 | Madera County |
| The Village Mobile Home Park | CA1900520 | CWS | Valencia | 71 | Los Angeles County |
| The Willows Resort | CA4400850 | CWS | Monterey | 57 | Santa Cruz County |
| Thermal Park | CA3303035 | CWS | Indio | 73 | Riverside County |
| Thimio Mwc | CA2702608 | CWS | Prunedale | 59 | Monterey County |
| Thomas Aquinas College | CA5601139 | NTNCWS | Santa Paula | 382 | Ventura County |
| Thomas Mountain Water Company | CA3301676 | CWS | Mountain Center | 157 | Riverside County |
| Thomas Shaft Wholesale | CA3810008 | CWS | Burlingame | 1 | San Joaquin County |
| Thousand Pines Christian | CA3600585 | NTNCWS | Crestline | 28 | San Bernardino County |
| Thousand Trails - Morgan Hill | CA4300615 | CWS | Morgan Hill | 13 | Santa Clara County |
| Three Crowns Association | CA1000533 | NTNCWS | Fresno | 25 | Fresno County |
| Three Rivers Elementary School | CA5400704 | NTNCWS | Three Rivers | 180 | Tulare County |
| Three Rivers Village | CA5400838 | NTNCWS | Santa Barbara | 25 | Tulare County |
| Three Springs Ranch Mutual Water Company | CA4300770 | CWS | Mt. Hamilton | 110 | Santa Clara County |
| Three Valleys Mwd | CA1910041 | CWS | Claremont | 0 | Los Angeles County |
| Thunderbird Cwd | CA3600306 | CWS | Apple Valley | 1,056 | San Bernardino County |
| Tico Mutual Water Co | CA5601122 | CWS | Ojai | 72 | Ventura County |
| Tid/ La Grange Water System | CA5000010 | CWS | Turlock | 195 | Stanislaus County |
| Tierra Bonita Mutual Water | CA1900154 | CWS | Lancaster | 75 | Los Angeles County |
| Tierra Buena Mhp #1 | CA5100112 | CWS | Zamora | 50 | Sutter County |
| Tierra Meadows Hoa Ws | CA2701367 | CWS | Salinas | 58 | Monterey County |
| Tierra Verde Mwc | CA2700775 | CWS | Salinas | 48 | Monterey County |
| Tierra Vista Mwc | CA2701959 | CWS | Salinas | 54 | Monterey County |
| Tiger Water Supply | CA4000205 | NTNCWS | San Luis Obispo | 1,600 | San Luis Obispo County |
| Timber Cove County Water District | CA4900584 | CWS | Jenner | 190 | Sonoma County |
| Timber Cove Inn | CA4901046 | NTNCWS | Jenner | 38 | Sonoma County |
| Tlc Child & Family Services | CA4901267 | NTNCWS | Sebastopol | 35 | Sonoma County |
| Tmc Suburban, Llc | CA4000752 | NTNCWS | San Luis Obispo | 25 | San Luis Obispo County |
| Tn Truss | CA1900040 | NTNCWS | Granada Hills | 35 | Los Angeles County |
| Tokay Park Water Co | CA3400172 | CWS | Sacramento | 653 | Sacramento County |
| Toledo Mhp | 090600021 | CWS | Thermal | 68 | |
| Tom Pistachio Water System | CA2000370 | NTNCWS | Fresno | 2,100 | Madera County |
| Tomales Elem & Middle School | CA2100560 | NTNCWS | Tomales | 225 | Marin County |
| Tomales High School | CA2100538 | NTNCWS | Tomales | 200 | Marin County |
| Tooleville Mutual Non Profit Water Assn | CA5400567 | CWS | Exeter | 340 | Tulare County |
| Top Industries Ws | CA2704623 | NTNCWS | Salinas | 50 | Monterey County |
| Torres-Martinez Avenue 64 | 090605116 | CWS | Thermal | 110 | |
| Torres-Martinez Clinic | 090605130 | CWS | Thermal | 379 | Riverside County |
| Town & Country Water Company | CA1502663 | CWS | Bakersfield | 73 | Kern County |
| Town Of Parker | 090415013 | CWS | Parker | 3,360 | San Bernardino County |
| Town Of Sunol - Sfpuc | CA0110012 | CWS | Burlingame | 281 | Alameda County |
| Toyon Middle School | CA0500085 | NTNCWS | San Andreas | 200 | Calaveras County |
| Toyon Park Water System Llc | CA0500039 | NTNCWS | Valley Springs | 150 | Calaveras County |
| Toyota San Luis Obispo | CA4000213 | NTNCWS | Santa Maria | 57 | San Luis Obispo County |
| Tpwc Dba The Prisoner Wine Company | CA2800562 | NTNCWS | St Helena | 200 | Napa County |
| Tract 1199 Water System | CA1000075 | CWS | Selma | 25 | Fresno County |
| Tract 92 Community Services District | CA5400903 | CWS | Farmersville | 500 | Tulare County |
| Tracy Matrl Recvry/Sld Waste Ws | CA3901477 | NTNCWS | Tracy | 130 | San Joaquin County |
| Tradewind Water Assoc. | CA1500406 | CWS | Weldon | 632 | Kern County |
| Traditional Medicinals, Inc. | CA4901147 | NTNCWS | Sebastopol | 120 | Sonoma County |
| Trailer Haven Mobile Home Park | CA0103041 | CWS | Sacramento | 459 | Alameda County |
| Trails End Mutual Water Company | CA3301682 | CWS | Mountain Center | 52 | Riverside County |
| Tranquillity Irrigation District | CA1010030 | CWS | Tranquillity | 686 | Fresno County |
| Travis Afb Wtp - Vallejo | CA4810015 | CWS | Vallejo | 3 | Solano County |
| Treasure Creek Woods Mwc | CA5301101 | CWS | Trinty Center | 131 | Trinity County |
| Treasure Island | CA3810702 | CWS | Burlingame | 3,864 | San Francisco County |
| Treehouse California Almonds Llc | CA5403139 | NTNCWS | Earlimart | 140 | Tulare County |
| Tres Pinos Cwd | CA3500509 | CWS | Tres Pinos | 350 | San Benito County |
| Tri-Cal Incorporated | CA3500805 | NTNCWS | Gilroy | 35 | San Benito County |
| Trinidad Extended Stay Rv | CA1200706 | CWS | Sacramento | 130 | Humboldt County |
| Trinidad, City Of | CA1210018 | CWS | Trinidad | 1,072 | Humboldt County |
| Trinity Center M.W.C. | CA5310003 | CWS | Trinity Center | 729 | Trinity County |
| Trinity Co. W.W. Dist #1 | CA5310002 | CWS | Hayfork | 2,324 | Trinity County |
| Trinity Knolls Mutual Water Company | CA5301102 | CWS | Trinity Center | 138 | Trinity County |
| Trinity Village Mutual Water | CA5304102 | CWS | Salyer | 330 | Trinity County |
| Triple R Mutual Water Co | CA5400670 | CWS | Springville | 408 | Tulare County |
| Truckee-Donner Pud - Hirschdale | CA2910010 | CWS | Truckee | 85 | Nevada County |
| True Leaf Farms, Llc. | CA3500917 | NTNCWS | San Juan Bautista | 372 | San Benito County |
| True Organic Products | CA1000584 | NTNCWS | Spreckles | 90 | Fresno County |
| Truroots | CA0400154 | NTNCWS | Chico | 85 | Butte County |
| Tucker Acres Mutual Water Co. | CA2800516 | CWS | Calistoga | 200 | Napa County |
| Tucker Oaks East Water District | CA4500303 | CWS | Anderson | 95 | Shasta County |
| Tud - Ponderosa | CA5510002 | CWS | Sonora | 1,781 | Tuolumne County |
| Tud - Tuolumne Water System | CA5510003 | CWS | Sonora | 1,798 | Tuolumne County |
| Tud-Apple Valley Estates | CA5510028 | CWS | Sonora | 829 | Tuolumne County |
| Tud-Peaceful Pines Water System | CA5510021 | CWS | Sonora | 92 | Tuolumne County |
| Tularcitos Mwc | CA2701800 | CWS | Carmel Valley | 90 | Monterey County |
| Tulare Co Correctional Center Road Camp | CA5400797 | NTNCWS | Visalia | 500 | Tulare County |
| Tulare County Civic Center | CA5401039 | NTNCWS | Visalia | 300 | Tulare County |
| Tulare County Hauling | CA5403050 | NTNCWS | Visalia | 25 | Tulare County |
| Tulare County Road Yard 2/3 | CA5402027 | NTNCWS | Visalia | 75 | Tulare County |
| Tulare Farms Lllp Water System | CA3901463 | NTNCWS | Manteca | 25 | San Joaquin County |
| Tule River Apple Valley | 090605074 | CWS | Porterville | 25 | |
| Tule River Reservation Main | 090600156 | CWS | Porterville | 2,560 | Tulare County |
| Tulelake, City Of | CA4710010 | CWS | Tulelake | 925 | Modoc County, Siskiyou County |
| Tully Mobile Estates | CA5000067 | CWS | Oakdale | 56 | Stanislaus County |
| Tunnel Trailer Park | CA3400192 | CWS | Walnut Grove | 48 | Sacramento County |
| Tuolumne - Black Oak Casino | 090605149 | NTNCWS | Tuolumne | 2,600 | |
| Tuolumne Me-Wuk Ridgeline | 090605169 | CWS | Tuolumne | 30 | |
| Turkey Creek Golf Club | CA3107084 | NTNCWS | Lincoln | 50 | Placer County |
| Turlock Auction Yard, Inc. | CA2400014 | NTNCWS | Turlock | 170 | Merced County |
| Turlock Golf & Country Club | CA2400078 | NTNCWS | Turlock | 350 | Merced County |
| Turner Road Vintners (East) | CA3901312 | NTNCWS | Lodi | 80 | San Joaquin County |
| Turner Trailer Park | 090605122 | CWS | Valley Center | 70 | |
| Tut Brothers Farm #96 | CA1500516 | CWS | Watsonville | 32 | Kern County |
| Twain Harte Community Services District | CA5510005 | CWS | Twain Harte | 2,378 | Tuolumne County |
| Twain Harte Valley Mwc | CA5500080 | CWS | Twain Harte | 202 | Tuolumne County |
| Twin Creeks Mobile And Rv Village | CA1700580 | CWS | Irvine | 50 | Lake County |
| Twin Cypress Mobile Home Park | CA5000071 | CWS | Oakdale | 112 | Stanislaus County |
| Twin Hills School Dist-Apple Blossom Sch | CA4900710 | NTNCWS | Sebastopol | 400 | Sonoma County |
| Twin Hills School Dist-Twin Hills School | CA4900707 | NTNCWS | Sebastopol | 400 | Sonoma County |
| Twin Lakes Resort | CA3701793 | CWS | La Mesa | 400 | San Diego County |
| Twin Oaks Mobile Park | CA3901074 | CWS | Stockton | 238 | San Joaquin County |
| Twin Ridges Grizzly Hill School | CA2900578 | NTNCWS | Nevada City | 125 | Nevada County |
| Twin Ridges Oak Tree School | CA2900593 | NTNCWS | Nevada City | 120 | Nevada County |
| Twin Valley Inc | CA4300575 | CWS | Castroville | 317 | Santa Clara County |
| Two Twenty Four Mobile Home Pk | CA2000592 | CWS | Clovis | 35 | Madera County |
| U.C. Kearney Field Station | CA1000279 | NTNCWS | Parlier | 102 | Fresno County |
| U.S. Coast Guard Training Center | CA4910701 | CWS | Petaluma | 469 | Sonoma County |
| U.S. Gypsum Co | CA1300517 | NTNCWS | Plaster City | 280 | Imperial County |
| U.S.N., San Nicolas Island | CA5610702 | CWS | Point Mugu | 187 | Ventura County |
| Uc Davis-School Of Vet. Med. Center | CA5401006 | NTNCWS | Davis | 50 | Tulare County |
| Uc Desert Research And Extension Center | CA1300571 | NTNCWS | Holtville | 33 | Imperial County |
| Under Canvas-Yosemite | CA5500372 | NTNCWS | Goveland | 26 | Tuolumne County |
| Union Heights Mwc | CA3500825 | CWS | Hollister | 98 | San Benito County |
| Union Pacific Railroad Co.-Keene Water | CA1500371 | CWS | Denver | 208 | Kern County |
| Unitarian Church Of Davis | CA5700773 | NTNCWS | Davis | 45 | Yolo County |
| United Parcel Service | CA0500009 | NTNCWS | West Sacramento | 112 | Calaveras County |
| United Parcel Svc - Anderson | CA4500315 | NTNCWS | West Sacramento | 150 | Shasta County |
| United Wtr Cons Dist | CA5610046 | CWS | Oxnard | 0 | Ventura County |
| Uplands Of The Kern Mutual Water Company | CA1500593 | CWS | Bakersfield | 80 | Kern County |
| Upper Lake County Water District | CA1710009 | CWS | Upper Lake | 989 | Lake County |
| Upper Lake Hardisty System | 090605025 | CWS | Upper Lake | 98 | Colusa County |
| Upper Little Bear Mountain Club | CA3600446 | CWS | Blue Jay | 72 | San Bernardino County |
| Upper Valley Disposal Service | CA2800020 | NTNCWS | St. Helena | 52 | Napa County |
| Ups Bishop (Cabis) | CA1410012 | NTNCWS | Baldwin Park | 35 | Inyo County |
| Us Horticulture Llc | CA2000672 | NTNCWS | Champaign | 73 | Madera County |
| Us Pipe Fabrication | CA5800913 | NTNCWS | Olivehurst | 50 | Yuba County |
| Usa Waste Of California | CA1000467 | NTNCWS | Fresno | 50 | Fresno County |
| Usasa-Pom Enclave - Camp Roberts | CA4000620 | NTNCWS | Seaside | 75 | San Luis Obispo County |
| Usbr-Sldmwa - Cvp Jones Pumping Plant | CA0110650 | NTNCWS | Byron | 90 | Alameda County |
| Usda Agricultural Research Service | CA1000565 | NTNCWS | Parlier | 80 | Fresno County |
| Usfs - Chuchupate Ranger Station | CA5601721 | NTNCWS | Solvang | 26 | Ventura County |
| Usfs Groveland Ranger Stn. | CA5500016 | NTNCWS | Sonora | 60 | Tuolumne County |
| Usfs Yolla Bolla Corp Yard | CA4500277 | NTNCWS | Platina | 68 | Shasta County |
| Usfs-Valyermo Ranger Station | CA1909627 | NTNCWS | Arcadia | 25 | Los Angeles County |
| Usfs/Trimmer Work Center | CA1000136 | NTNCWS | Clovis | 56 | Fresno County |
| Usfws San Luis Nwr Complex | CA2410021 | NTNCWS | Los Banos | 146 | Merced County |
| Usmc - Housing Coleville | CA2610701 | CWS | Bridgeport | 424 | Mono County |
| Usmc Nebo (Barstow) | CA3610701 | CWS | Barstow | 217 | San Bernardino County |
| Usmc Yermo Annex | CA3610702 | NTNCWS | Barstow | 1,184 | San Bernardino County |
| Usmc/Mtn Warfare Trng Ctr - Bridgeport | CA2610700 | CWS | Bridgeport | 300 | Mono County |
| Usn San Clemente Island | CA3710707 | NTNCWS | San Diego | 200 | San Diego County |
| Utu Utu Gwaitu Paiute Tribe | 090600159 | CWS | Benton | 222 | Mono County |
| Uvas Pines Rv Park | CA4300999 | CWS | Morgan Hill | 65 | Santa Clara County |
| V & P Trailer Court Water System | CA3900732 | CWS | Stockton | 35 | San Joaquin County |
| V Lions Ops Water System | CA1502133 | NTNCWS | Wasco | 250 | Kern County |
| V. Sattui Winery | CA2801088 | NTNCWS | Calistoga | 45 | Napa County |
| Vaca Villa Apartments | CA4800531 | CWS | Vacaville | 60 | Solano County |
| Vaca-Dixon Substation | CA4800826 | NTNCWS | Oakland | 40 | Solano County |
| Vachell Water System | CA4000806 | NTNCWS | San Luis Obispo | 150 | San Luis Obispo County |
| Vailima Estates Mutual Water | CA2800532 | CWS | St. Helena | 25 | Napa County |
| Valenzuela Water System | CA3500527 | CWS | Hollister | 55 | San Benito County |
| Valhalla Water Association | CA1900599 | CWS | Tujunga | 25 | Los Angeles County |
| Valimet Inc | CA3901194 | NTNCWS | Stockton | 46 | San Joaquin County |
| Valivu Estates Mhp | CA3200189 | CWS | Greenville | 54 | Plumas County |
| Valley Children'S Hospital | CA2000275 | NTNCWS | Madera | 2,500 | Madera County |
| Valley Creek Mhp Ws | CA2702405 | CWS | Bulverde | 129 | Monterey County |
| Valley Estates Poa, Inc. | CA1500478 | CWS | Weldon | 386 | Kern County |
| Valley Ford Water Association | CA4900568 | CWS | Valley Ford | 84 | Sonoma County |
| Valley Home School Pioneer | CA5000277 | NTNCWS | Valley Home | 26 | Stanislaus County |
| Valley Home School Texas | CA5000132 | NTNCWS | Valley Home | 80 | Stanislaus County |
| Valley Landscaping & Maint Inc | CA3901400 | NTNCWS | Lodi | 25 | San Joaquin County |
| Valley Mobile Home Park | CA1300572 | CWS | Calexico | 70 | Imperial County |
| Valley Oaks Mhp Ws | CA2701687 | CWS | Lockwood | 108 | Monterey County |
| Valley Of Enchantment Mwc | CA3610051 | CWS | Crestline | 2,471 | San Bernardino County |
| Valley Springs Pud | CA0510010 | CWS | Valley Springs | 900 | Calaveras County |
| Valley State Prison | CA2010801 | CWS | Chowchilla | 3,151 | Madera County |
| Valley View Estates Mutual Water Co | CA1500569 | CWS | Keene | 97 | Kern County |
| Valley View Park Mwc | CA3610046 | CWS | Crestline | 499 | San Bernardino County |
| Valley View Ranches | CA4300996 | CWS | Gilroy | 45 | Santa Clara County |
| Valley View Trailer Park | CA3301717 | CWS | Hopewell | 135 | Riverside County |
| Valley Vista Mutual Water Company | CA1400025 | CWS | Bishop | 70 | Inyo County |
| Valpico Industrial Park | CA3901409 | NTNCWS | Tracy | 150 | San Joaquin County |
| Van Groningen & Sons Inc Water System | CA3902190 | NTNCWS | Manteca | 125 | San Joaquin County |
| Van Loon Water Association | CA1400518 | CWS | Bishop | 25 | Inyo County |
| Vargas Mhp | 090600042 | CWS | Indio | 35 | |
| Varian Ranch Mutual Water | CA4000765 | CWS | Arroyo Grande | 105 | San Luis Obispo County |
| Ventana Big Sur Inn Ws | CA2702328 | CWS | Big Sur | 66 | Monterey County |
| Ventura Coastal, Llc - Tipton Division | CA5403119 | NTNCWS | Tipton | 130 | Tulare County |
| Ventura Coastal, Llc - Visalia Division | CA5401082 | NTNCWS | Tipton | 120 | Tulare County |
| Ventura Cwwd No. 17 - Bell Canyon | CA5610003 | CWS | Moorpark | 1,946 | Ventura County |
| Ventura Cwwd No. 19 - Somis | CA5610015 | CWS | Moorpark | 1,429 | Ventura County |
| Ventura Cwwd No. 38 - Lake Sherwood | CA5610069 | CWS | Moorpark | 1,759 | Ventura County |
| Ventura Farms | CA5603118 | NTNCWS | Thousand Oaks | 100 | Ventura County |
| Venture Estates Mwc | CA3500552 | CWS | Hollister | 50 | San Benito County |
| Verde Vale Elementary School | CA4500193 | NTNCWS | Anderson | 340 | Shasta County |
| Verde Vale Water Company | CA4500007 | CWS | Anderson | 356 | Shasta County |
| Veterans Home Of California | CA2810008 | CWS | Yountville | 1,000 | Napa County |
| Veterinary Development Company | CA3107310 | NTNCWS | Loomis | 40 | Placer County |
| Victor Service Center | CA3901285 | NTNCWS | Oakland | 50 | San Joaquin County |
| Victor Valley Wastewater Reclam | CA3601145 | NTNCWS | Victorville | 80 | San Bernardino County |
| Victory Mutual Water Company | CA1500231 | CWS | Bakersfield | 740 | Kern County |
| Vie-Del Company | CA1000593 | NTNCWS | Fresno | 49 | Fresno County |
| Vieira'S Resort, Inc | CA3400164 | CWS | Isleton | 150 | Sacramento County |
| Vieja Mutual Water Company | CA4200702 | CWS | Santa Barbara | 60 | Santa Barbara County |
| Viejo Ltd | CA3901421 | NTNCWS | San Francisco | 163 | San Joaquin County |
| Vierra Knolls Mwc | CA2702055 | CWS | Salinas | 66 | Monterey County |
| Vierra Meadows Mwc | CA2702003 | CWS | Salinas | 65 | Monterey County |
| Viking Rv Park | CA1000454 | CWS | Kingsburg | 44 | Fresno County |
| Villa Blue Estates Water District | CA1700579 | CWS | Upper Lake | 60 | Lake County |
| Villa Cerezos | CA3900596 | CWS | Los Altos | 200 | San Joaquin County |
| Villa Del Monte Mwc | CA4400595 | CWS | Los Gatos | 422 | Santa Cruz County |
| Villa Tahoe Condominiums | CA0900624 | CWS | Milpitas | 66 | El Dorado County |
| Village Apartments | CA5400875 | CWS | Three Rivers | 33 | Tulare County |
| Village Bradshaw | CA3400454 | NTNCWS | Sacramento | 100 | Sacramento County |
| Village Green | CA4500194 | CWS | Anderson | 90 | Shasta County |
| Vina Elementary School | CA5200544 | NTNCWS | Vine | 90 | Tehama County |
| Vine & Branch Fellowship | CA0500095 | NTNCWS | Angels Camp | 85 | Calaveras County |
| Vinehill Vistas Mutual Water Company | CA4900793 | CWS | Sebastopol | 37 | Sonoma County |
| Vineyard Ave Estates Mwc | CA5610056 | CWS | Oxnard | 1,200 | Ventura County |
| Vineyard Avenue Acres Mwc | CA5610029 | CWS | Oxnard | 1,820 | Ventura County |
| Vineyard Estates Mwc | CA3500579 | CWS | Hollister | 90 | San Benito County |
| Vineyard Mutual Water Company/Industrial | CA5602120 | NTNCWS | Ventura | 259 | Ventura County |
| Vineyard Rv Park | CA4800753 | CWS | Vacaville | 550 | Solano County |
| Vino Farms, Inc. - Preston Ranch | CA4901236 | NTNCWS | Healdsburg | 72 | Sonoma County |
| Vino Farms, Inc. - Wasson Ranch | CA4901161 | NTNCWS | Healdsburg | 35 | Sonoma County |
| Vinwood Cellars Production Area | CA4901201 | NTNCWS | Geyserville | 80 | Sonoma County |
| Virginia Dare Winery | CA4900935 | NTNCWS | Geyserville | 51 | Sonoma County |
| Vista De Las Cruces | CA4200747 | NTNCWS | Gaviota | 50 | Santa Barbara County |
| Vista Del Toro Ws | CA2700799 | CWS | Corral De Tierra | 92 | Monterey County |
| Vista Grande Water System | CA5200012 | CWS | Gerber | 468 | Tehama County |
| Vista Grande Water Users Association | CA4300550 | CWS | Los Gatos | 79 | Santa Clara County |
| Vista Hills Mutual Water Company | CA4200848 | CWS | Lompoc | 75 | Santa Barbara County |
| Vista Robles Association | CA4400625 | CWS | Ben Lomond | 53 | Santa Cruz County |
| Volcano Community Service Dist | CA0300016 | CWS | Volcano | 103 | Amador County |
| Volta Community Sd | CA2400201 | CWS | Los Banos | 366 | Merced County |
| Vulcan Materials Company - Cal Mat | CA5602514 | NTNCWS | Oxnard | 30 | Ventura County |
| Waddington W.W. | CA1200718 | CWS | Ferndale | 75 | Humboldt County |
| Wagon Train Road Llc | CA3601133 | NTNCWS | Phelan/Cajon Jnctn | 25 | San Bernardino County |
| Wal*Mart Dist. Ctr/Eco Res | CA5200006 | NTNCWS | Red Bluff | 825 | Tehama County |
| Walker Creek Ranch Educational Center | CA2100545 | NTNCWS | Petaluma | 200 | Marin County |
| Walker Ranch Csd | CA3205001 | CWS | Quincy | 150 | Plumas County |
| Walking M Ranches | CA4200804 | CWS | Solvang | 54 | Santa Barbara County |
| Walnut Acres | CA3901113 | CWS | Stockton | 106 | San Joaquin County |
| Walnut Cove Mobile Estates | CA1700674 | CWS | Kelseyville | 200 | Lake County |
| Walnut Grove Elementary School | CA3400268 | NTNCWS | Rio Vista | 200 | Sacramento County |
| Walnut Hills Mutual Water Co | CA4000670 | CWS | Paso Robles | 486 | San Luis Obispo County |
| Ward Well Water Company | CA3110031 | CWS | Tahoe City | 425 | Placer County |
| Warner Springs Estates | CA3702354 | CWS | Temecula | 448 | San Diego County |
| Warner Springs Ranch Resort Llc | CA3700959 | NTNCWS | San Diego | 32 | San Diego County |
| Warner Unified School District | CA3701010 | NTNCWS | Warner Springs | 250 | San Diego County |
| Washington School Ws | CA2701221 | NTNCWS | Salinas | 250 | Monterey County |
| Washington Ridge C.C. | CA2910013 | CWS | Nevada City | 70 | Nevada County |
| Washington School | CA2400071 | NTNCWS | Winton | 340 | Merced County |
| Washington Water District | CA2900523 | CWS | Washington | 330 | Nevada County |
| Washoe Tribe Stewart | 093200359 | CWS | Gardnerville | 150 | El Dorado County |
| Washoe Tribe Woodfords | 090600362 | CWS | Gardnerville | 250 | Mono County |
| Waste Connections Water Co | CA4000766 | NTNCWS | San Luis Obispo | 35 | San Luis Obispo County |
| Wasuma School | CA2000616 | NTNCWS | Oakhurst | 354 | Madera County |
| Water Facilities Authority-Jpa | CA3610006 | CWS | Upland | 0 | San Bernardino County |
| Waterford - Hickman | CA5010026 | CWS | Waterford | 597 | Stanislaus County |
| Waterford-River Pointe | CA5010042 | CWS | Waterford | 1,079 | Stanislaus County |
| Waters Road Domestic Users Group | CA5602132 | CWS | Moorpark | 25 | Ventura County |
| Watsonville Produce Inc | CA2700518 | NTNCWS | Moss Landing | 98 | Monterey County |
| Waukena Elementary School | CA5400795 | NTNCWS | Tulare | 220 | Tulare County |
| Wayside Motel Apartments Wtr Sys | CA3900835 | CWS | Stockton | 70 | San Joaquin County |
| Weaver Lumber Water System | CA4500337 | NTNCWS | Anderson | 40 | Shasta County |
| Weed, City Of | CA4710009 | CWS | Weed | 2,662 | Siskiyou County |
| Weeks Roses Water System | CA1503642 | NTNCWS | Wasco | 25 | Kern County |
| Wegis Mutual Water Company | CA1502600 | CWS | Bakersfield | 64 | Kern County |
| Wendell Lane Mutual Water Company | CA4900669 | CWS | Sebastopol | 82 | Sonoma County |
| Weott C.S.D. | CA1200553 | CWS | Weott | 448 | Humboldt County |
| Wespak, Inc. | CA5400526 | NTNCWS | Dinuba | 53 | Tulare County |
| West Almanor M.W.C. | CA3210007 | CWS | Chester | 1,464 | Plumas County |
| West Coast Sand & Gravel | CA5000529 | NTNCWS | Modesto | 25 | Stanislaus County |
| West Cottonwood Apartments | CA4500247 | CWS | Chico | 90 | Shasta County |
| West End Consolidated Water Company | CA3610086 | CWS | Upland | 0 | Los Angeles County, San Bernardino County |
| West End Mwc | CA3600345 | CWS | Lucerne Valley | 98 | San Bernardino County |
| West Palm Springs Village | CA3310078 | CWS | Desert Hot Springs | 517 | Riverside County |
| West Park Properties | CA0800605 | CWS | Crescent City | 112 | Del Norte County |
| West Side Union School District | CA4900719 | NTNCWS | Healdsburg | 175 | Sonoma County |
| West Tech Industrial Park | CA1000578 | NTNCWS | Kingsburg | 42 | Fresno County |
| West Tehachapi Mutual | CA1500340 | CWS | Tehachapi | 150 | Kern County |
| West Valley Baptist Church | CA5700816 | NTNCWS | Woodland | 25 | Yolo County |
| West Valley County Water District | CA1909006 | CWS | Sacramento | 798 | Los Angeles County |
| West Valley High School | CA4500214 | NTNCWS | Cottonwood | 850 | Shasta County |
| West Valley Mutual Water Company | CA1500550 | CWS | Inyokern | 70 | Kern County |
| West Water Company (Puc) | CA4900893 | CWS | Santa Rosa | 40 | Sonoma County |
| Western Acres Mutual Water Company | CA1503475 | CWS | Hanford | 380 | Kern County |
| Western Hills Water District/Diablo Gran | CA5010039 | CWS | Patterson | 2,000 | Stanislaus County |
| Western Mobile Home Park | CA4900791 | CWS | Stockton | 178 | Sonoma County |
| Western Mwd (Arlington) | CA3310075 | CWS | Riverside | 0 | Orange County, Riverside County |
| Western Mwd (Id A - Rainbow) | CA3310076 | CWS | Riverside | 196 | Riverside County |
| Western Pallet Supply & Logistics | CA3901336 | NTNCWS | Tracy | 60 | San Joaquin County |
| Western Skies Mobile Home Park | CA1900541 | CWS | Lancaster | 198 | Los Angeles County |
| Western Valley Meat Company | CA1000461 | NTNCWS | Fresno | 815 | Fresno County |
| Westerner Mobile Home Park | CA3400331 | CWS | Elk Grove | 65 | Sacramento County |
| Westhaven C.S.D. | CA1210024 | CWS | Trinidad | 490 | Humboldt County |
| Westlands Water District | CA1000361 | NTNCWS | Fresno | 48 | Fresno County |
| Westley Csd | CA5000408 | CWS | Crows Landing | 70 | Stanislaus County |
| Westminster Woods Camp | CA4901095 | NTNCWS | Occidental | 18 | Sonoma County |
| Westmorland, City Of | CA1310008 | CWS | Westmorland | 2,202 | Imperial County |
| Westport County Water District | CA2300730 | CWS | Westport | 70 | Mendocino County |
| Westside Harvesting | CA1009214 | CWS | Fresno | 69 | Fresno County |
| Westside Harvesting, Llc | CA1600022 | NTNCWS | Kettleman City | 53 | Kings County |
| Westside Park Mutual Water | CA1900102 | CWS | Palmdale | 495 | Los Angeles County |
| Westwind Mobile Home Park | CA1700584 | CWS | Lake Oswego | 104 | Lake County |
| Westwood C.S.D. | CA1810002 | CWS | Westwood | 1,662 | Lassen County |
| Wheatland Park Estates | CA5800821 | CWS | Granite Bay | 26 | Yuba County |
| Wheeler Crest Csd | CA2600714 | CWS | Bishop | 86 | Mono County |
| Whiskeytown Nra-Headquarters | CA4510506 | NTNCWS | Whiskeytown | 31 | Shasta County |
| Whispering Pines Inn | CA3500810 | CWS | Hollister | 28 | San Benito County |
| Whispering Pines Mhp | CA2000605 | CWS | Oakhurst | 38 | Madera County |
| Whispering Pines Mobile Home Park | CA5800827 | CWS | Yuba City | 25 | Yuba County |
| White Fence Farms Mwc No. 1 | CA1910249 | CWS | Palmdale | 1,518 | Los Angeles County |
| White Fence Farms Mwc No.3 | CA1900523 | CWS | Lancaster | 749 | Los Angeles County |
| White Mountain Mutual Water Company | CA2600621 | CWS | Bishop | 142 | Inyo County, Mono County |
| White Oak Mutual Water Company | CA4500204 | CWS | Cottonwood | 415 | Shasta County |
| White'S Steel, Inc. | CA3301305 | NTNCWS | Thermal | 85 | Riverside County |
| Whitehawk Ranch Mwc | CA3200102 | CWS | Clio | 540 | Plumas County |
| Whitethorn Construction | CA1206012 | NTNCWS | Whitethorn | 45 | Humboldt County |
| Whitethorn Elementary School | CA1200522 | NTNCWS | Miranda | 33 | Humboldt County |
| Wilbur-Ellis Company Llc | CA5700768 | NTNCWS | Woodland | 45 | Yolo County |
| Wilcox Station Ranch | CA0707623 | CWS | Canyon | 31 | Contra Costa County |
| Wild Wings Golf Community | CA5710011 | CWS | Woodland | 1,115 | Yolo County |
| Wildewood East Mutual | CA5101009 | CWS | Yuba City | 350 | Sutter County |
| Wildhorse Cafe Ws | CA2701172 | NTNCWS | King City | 367 | Monterey County |
| Wildland Training Center | CA1502691 | NTNCWS | Bakersfield | 130 | Kern County |
| Wildwood Mobile Home Pk Inc | CA2000608 | CWS | Fresno | 106 | Madera County |
| Wilkinson Manor A-Zone Pws | CA3901159 | CWS | Stockton | 125 | San Joaquin County |
| William Hill Winery | CA2801055 | NTNCWS | Napa | 25 | Napa County |
| Williams - Rc Farms Ws | CA2704520 | CWS | Gonzales | 35 | Monterey County |
| Williams Mutual Water Company | CA5400718 | CWS | Porterville | 165 | Tulare County |
| Williams Selyem Winery | CA4901335 | NTNCWS | Healdsburg | 25 | Sonoma County |
| Willis Construction Ws | CA3500919 | NTNCWS | San Juan Bautista | 76 | San Benito County |
| Willitts Equipment Company, Inc. | CA5403154 | NTNCWS | Exeter | 50 | Tulare County |
| Willow Creek C.S.D. | CA1210015 | CWS | Willow Creek | 1,720 | Humboldt County |
| Willow Creek Christian School | CA1100104 | NTNCWS | Willows | 47 | Glenn County |
| Willow Creek School | CA4700569 | NTNCWS | Montague | 100 | Siskiyou County |
| Willow Grove Union Elementary School | CA3500801 | NTNCWS | Paicines | 25 | San Benito County |
| Willow Mobile Home Park | CA0707613 | CWS | Martinez | 481 | Contra Costa County |
| Willow Park Marina | CA0707507 | CWS | Oakley | 380 | Contra Costa County |
| Willow Pass Bussiness Park Water System | CA0706050 | NTNCWS | Concord | 60 | Contra Costa County |
| Willow Springs Mobile Home Park | CA1500542 | CWS | Tehachapi | 275 | Kern County |
| Willows Mobile Home Community & Rv Park | CA1100237 | CWS | Willows | 227 | Glenn County |
| Willowside Mutual Water Company | CA4900561 | CWS | Santa Rosa | 528 | Sonoma County |
| Willowside School | CA4901156 | NTNCWS | Santa Rosa | 460 | Sonoma County |
| Willowside Terrace Water Association | CA3701995 | CWS | Alpine | 100 | San Diego County |
| Wilshire Heights Mutual Water Company | CA4900573 | CWS | Santa Rosa | 70 | Sonoma County |
| Wilson Acres Mutual Water | CA5200014 | CWS | Red Bluff | 75 | Tehama County |
| Wilson Circle Mutual Water Company | CA1400135 | CWS | Bishop | 158 | Inyo County |
| Wilson Road Water Community | CA1500494 | CWS | Bakersfield | 66 | Kern County |
| Wilsona Gardens Mutual | CA1900155 | CWS | Lancaster | 136 | Los Angeles County |
| Wilton Bible Church | CA3400273 | NTNCWS | Wilton | 130 | Sacramento County |
| Windflower Point Mutual Water Company | CA1700657 | CWS | Clearlake | 25 | Lake County |
| Windset Farms Greenhouses | CA4200962 | NTNCWS | Santa Maria | 900 | Santa Barbara County |
| Wine Country Ind Park - Bldg C | CA4901332 | NTNCWS | Sonoma | 70 | Sonoma County |
| Wine Country Inn | CA2800648 | NTNCWS | Las Angeles | 60 | Napa County |
| Wini Mutual Water Company | CA1503526 | CWS | Bakersfield | 29 | Kern County |
| Winterhaven County Water District | CA1300009 | CWS | Winterhaven | 394 | Imperial County |
| Winterhaven Mobile Estates | CA1900961 | CWS | Lake Hughes | 56 | Los Angeles County |
| Womack Subdivision M.W.C. | CA5200013 | CWS | Red Bluff | 40 | Tehama County |
| Wonder Acres Water System | CA1500324 | CWS | California City | 92 | Kern County |
| Wonder Valley River Way Ranch | CA1000148 | NTNCWS | Sanger | 62 | Fresno County |
| Wonderful Nurseries, Llc | CA1504001 | NTNCWS | Shafter | 240 | Kern County |
| Wood Colony Christian School | CA5000404 | NTNCWS | Modesto | 90 | Stanislaus County |
| Woodfords Mutual Water Company | CA0202503 | CWS | Minden | 50 | Alpine County |
| Woodland Heights Mwc | CA2702439 | CWS | Prunedale | 57 | Monterey County |
| Woodland Park Mutual Water Co | CA4000506 | CWS | Arroyo Grande | 538 | San Luis Obispo County |
| Woodland-Davis Clean Water Agency | CA5710012 | CWS | Woodland | 0 | Yolo County |
| Woodlands Development | CA4010081 | CWS | Arroyo Grande | 3,862 | San Luis Obispo County |
| Woodridge Mutual Water Co | CA4500235 | CWS | Shingletown | 176 | Shasta County |
| Woods, The (Mendocino) | CA2300667 | CWS | Santa Cruz | 153 | Mendocino County |
| Woodside Rv Park | CA2300644 | CWS | Fort Bragg | 280 | Mendocino County |
| Woodside Wa | CA2702140 | CWS | Carmel Valley | 45 | Monterey County |
| Woodson Bridge Mhp | CA5200551 | CWS | Silverdale | 158 | Tehama County |
| Woodson Bridge Rv Park | CA5200010 | CWS | Corning | 45 | Tehama County |
| Woodstock Ranch | CA4200807 | CWS | Santa Ynez | 325 | Santa Barbara County |
| Woodville Farm Labor Center | CA5400792 | CWS | Visalia | 646 | Tulare County |
| Woodville Public Utility Dist | CA5410025 | CWS | Tulare | 1,740 | Tulare County |
| Woodward Bluffs Mhp | CA1000298 | CWS | Fresno | 300 | Fresno County |
| Wp&A - King Water System | CA1503275 | NTNCWS | Lost Hills | 300 | Kern County |
| Wp&A - Lost Hills Water System | CA1502759 | NTNCWS | Lost Hills | 1,506 | Kern County |
| Wp&A-Firebaugh Water System | CA2010015 | NTNCWS | Lost Hills | 173 | Kern County, Madera County |
| Wynola Water District | CA3701837 | CWS | San Ysabel | 140 | San Diego County |
| Yes Charter Academy | CA5800006 | NTNCWS | Oregon House | 125 | Yuba County |
| Yettem Water System | CA5403043 | CWS | Visalia | 350 | Tulare County |
| Ymca Camp Marston/Raintree | CA3700912 | CWS | Julian | 28 | San Diego County |
| Yokayo Tribe Of Indians | CA2300837 | CWS | Talmage | 75 | Mendocino County |
| Yokohl Mutual Water Co | CA5400647 | CWS | Visalia | 95 | Tulare County |
| Yolo Co Airport | CA5700714 | NTNCWS | Woodland | 114 | Yolo County |
| Yolo Co Central Landfill | CA5700778 | NTNCWS | Woodland | 40 | Yolo County |
| Yolo Co Housing Authority-El Rio Villa | CA5700615 | CWS | Woodland | 432 | Yolo County |
| Yolo Fliers Club | CA5700652 | NTNCWS | Woodland | 25 | Yolo County |
| Yosemite Forks Est Mutual | CA2000527 | CWS | Oakhurst | 110 | Madera County |
| Yosemite Lakes Community Church | CA2000202 | NTNCWS | Coarsegold | 51 | Madera County |
| Yosemite Nps-El Portal | CA2210515 | CWS | Yosemite Np | 635 | Mariposa County |
| Yosemite Nps-Hodgdon Meadow | CA5510503 | CWS | Yosemite Np | 51 | Tuolumne County |
| Yosemite Nps-Wawona | CA2210510 | CWS | Yosemite Np | 150 | Mariposa County |
| Yosemite Nps-Yosemite Valley | CA2210503 | CWS | Yosemite Np | 1,000 | Mariposa County |
| Yosemite Terrace Estates | CA2210925 | CWS | Greeley Hill | 130 | Mariposa County |
| Yosemite Valley Beef Packing Co Inc | CA2400248 | NTNCWS | Merced | 55 | Merced County |
| Yosemite View Lodge | CA2210926 | NTNCWS | Watsonville | 50 | Mariposa County |
| Yosemite Vista Estates | CA5500119 | CWS | Groveland | 80 | Tuolumne County |
| Yosemite West Water System | CA2210924 | CWS | Mariposa | 420 | Mariposa County |
| Yosemite Wholesale | CA2400139 | NTNCWS | Modesto | 250 | Merced County |
| Youth With A Mission-Springs Of Living W | CA0400001 | CWS | Richardson Springs | 150 | Butte County |
| Yuba Apartment Homes | CA5102025 | CWS | Yuba City | 40 | Sutter County |
| Yuima Municipal Water District | CA3701408 | CWS | Pauma Valley | 360 | San Diego County |
| Yuima Municipal Water District Ida | CA3700938 | CWS | Pauma Valley | 693 | San Diego County |
| Yulica | CA2900546 | CWS | Nevada City | 25 | Nevada County |
| Yulupa Mutual Water Company | CA4900660 | CWS | Santa Rosa | 200 | Sonoma County |
| Yurok - Kepel | 090605033 | CWS | Klamath | 76 | |
| Yurok - Mccoy - Kenek | 090600161 | CWS | Klamath | 30 | |
| Yurok - Requa | 090605014 | CWS | Klamath | 215 | Del Norte County |
| Yurok - Terwer Water System | 090605143 | CWS | Klamath | 300 | Del Norte County |
| Yurok - Wautec | 090600134 | CWS | Klamath | 96 | Humboldt County |
| Yurok - Weitchpec | 090605006 | CWS | Klamath | 120 | Siskiyou County |
| Z Best Products | CA4300993 | NTNCWS | Gilroy | 90 | Santa Clara County |
| Z D Wines | CA2801056 | NTNCWS | Napa | 95 | Napa County |
| Z Ranch Mwc | CA2700731 | CWS | Salinas | 62 | Monterey County |
| Zone 7 Water Agency | CA0110010 | CWS | Livermore | 40 | Alameda County, Contra Costa County |
| Zonneveld Dairy - Cedar | CA1000369 | CWS | Laton | 68 | Fresno County |
| Zonneveld Dairy - Cerini | CA1000627 | CWS | Laton | 36 | Fresno County |
| Zoo Med-Winterhaven | CA4000852 | NTNCWS | San Luis Obispo | 80 | San Luis Obispo County |