1,150 community and non-transient non-community water systems are listed for Arizona in EPA SDWIS. 180 were sampled under UCMR 5; 61 of those had at least one PFAS result at or above the reporting level, and 26 had a highest single result at or above a 2024 EPA limit (PFOA or PFOS 4 ppt, or Hazard Index 1).
Arizona 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 (180)
| System | PWSID | City | Population | Highest PFOA (ppt) | Highest PFOS (ppt) | Highest HI | Highest single result |
|---|---|---|---|---|---|---|---|
| Adoc Eyman Unit | AZ0411705 | Phoenix | 3,969 | <MRL | <MRL | 0 | No PFAS detected |
| Adoc Florence Asp | AZ0411066 | Florence | 1,001 | <MRL | <MRL | 0 | No PFAS detected |
| Adoc Tucson | AZ0420557 | Tucson | 4,500 | <MRL | <MRL | 0 | No PFAS detected |
| Ak-Chin Village | 090400090 | Maricopa | 11,646 | <MRL | <MRL | 0 | Other PFAS detected |
| Apache Junction Water District | AZ0411039 | Apache Junction | 15,610 | <MRL | <MRL | 0 | No PFAS detected |
| Arizona Water Co - Apache Junction | AZ0411004 | Phoenix | 62,055 | <MRL | <MRL | 0 | No PFAS detected |
| Arizona Water Co - Bisbee | AZ0402001 | Phoenix | 8,590 | 9.7 | <MRL | 0.005 | PFOA 1–3 × its limit |
| Arizona Water Co - Lakeside | AZ0409003 | Phoenix | 12,191 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Arizona Water Co - Miami Claypool | AZ0404002 | Phoenix | 8,616 | <MRL | <MRL | 1.218 | Hazard Index 1–3 × its limit |
| Arizona Water Co - Oracle | AZ0411019 | Phoenix | 10,585 | <MRL | <MRL | 0 | No PFAS detected |
| Arizona Water Co - Overgaard | AZ0409004 | Phoenix | 13,797 | <MRL | <MRL | 0 | No PFAS detected |
| Arizona Water Co - Pinal Valley | AZ0411009 | Phoenix | 134,432 | <MRL | <MRL | 0.653 | Hazard Index below its limit |
| Arizona Water Co - Pinetop Lakes | AZ0409018 | Phoenix | 3,558 | <MRL | <MRL | 0 | No PFAS detected |
| Arizona Water Co - Pinewood | AZ0403002 | Phoenix | 8,115 | <MRL | <MRL | 0 | No PFAS detected |
| Arizona Water Co - Rimrock | AZ0413046 | Phoenix | 3,532 | <MRL | <MRL | 0 | No PFAS detected |
| Arizona Water Co - San Manuel | AZ0411020 | Phoenix | 4,737 | <MRL | <MRL | 0 | No PFAS detected |
| Arizona Water Co - Sedona | AZ0403003 | Phoenix | 12,104 | 10 | 6 | 0.715 | PFOA 1–3 × its limit |
| Arizona Water Co - Sierra Vista | AZ0402004 | Phoenix | 9,233 | <MRL | <MRL | 0 | Other PFAS detected |
| Arizona Water Co - Superior | AZ0411021 | Phoenix | 4,232 | <MRL | <MRL | 0 | No PFAS detected |
| Arizona Water Co - White Tanks | AZ0407128 | Phoenix | 18,858 | <MRL | <MRL | 0 | Other PFAS detected |
| Aspc Lewis Complex Water System | AZ0407555 | Buckeye | 4,300 | <MRL | <MRL | 0 | No PFAS detected |
| Aspc Yuma | AZ0414099 | San Luis | 4,197 | <MRL | <MRL | 0 | No PFAS detected |
| Avondale City Of | AZ0407088 | Avondale | 96,130 | 13.5 | 11.7 | 0.944 | PFOA ≥ 3 × its limit |
| Avra Water Coop Inc | AZ0410006 | Tucson | 6,685 | <MRL | <MRL | 0 | No PFAS detected |
| Az State Prison - Geo Group - Kingman | AZ0408184 | Golden Valley | 3,500 | <MRL | <MRL | 0 | No PFAS detected |
| Beardsley Water Company 1 | AZ0407007 | Litchfield Park | 10,881 | <MRL | <MRL | 0 | No PFAS detected |
| Bella Vista City Water System | AZ0402010 | Sierra Vista | 20,045 | <MRL | <MRL | 0 | Other PFAS detected |
| Benson, City Of Water System | AZ0402005 | Benson | 5,355 | <MRL | <MRL | 0 | No PFAS detected |
| Bermuda Water Company Inc | AZ0408063 | Fort Mohave | 25,000 | <MRL | <MRL | 0.003 | Hazard Index below its limit |
| Bia Truxton Agency | 090400063 | Valentine | 16 | <MRL | <MRL | 0 | No PFAS detected |
| Big Park Water Company | AZ0413012 | Sedona | 7,392 | 21 | 4.1 | 0.344 | PFOA ≥ 3 × its limit |
| Buckeye City Of | AZ0407089 | Buckeye | 7,998 | <MRL | <MRL | 0 | No PFAS detected |
| Bullhead City Mohave | AZ0408032 | Bullhead City | 36,330 | 5.3 | 7.3 | 0.7 | PFOS 1–3 × its limit |
| California Village | 090600237 | Needles | 1,290 | <MRL | <MRL | 0 | No PFAS detected |
| Carefree Water Company | AZ0407015 | Carefree | 3,588 | <MRL | <MRL | 0 | No PFAS detected |
| Casino Arizona | 090400708 | Scottsdale | 10,603 | <MRL | <MRL | 0 | No PFAS detected |
| Casino Arizona Talking Stick (Cats) | 090400703 | Scottsdale | 25,785 | <MRL | <MRL | 0 | No PFAS detected |
| Cave Creek Water | AZ0407016 | Cave Creek | 5,895 | <MRL | <MRL | 0 | No PFAS detected |
| Cca - Eloy Complex | AZ0411115 | Eloy | 8,852 | <MRL | <MRL | 0 | No PFAS detected |
| Chandler City Of | AZ0407090 | Chandler | 247,328 | <MRL | <MRL | 0.006 | Hazard Index below its limit |
| Chinle-Many Farms-Del Muerto Ntua | NN0400174 | Ft Defiance | 8,458 | <MRL | <MRL | 0 | No PFAS detected |
| Chino Valley High School | AZ0413087 | Chino Valley | 960 | <MRL | <MRL | 0 | Other PFAS detected |
| Chino Valley School - Del Rio | AZ0413187 | Chino Valley | 800 | <MRL | <MRL | 0 | Other PFAS detected |
| City Of Buckeye - Valencia Town Division | AZ0407078 | Buckeye | 30,377 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Buckeye Sonora - Sundance | AZ0407154 | Buckeye | 21,405 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Show Low | AZ0409026 | Show Low | 17,139 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Willcox | AZ0402035 | Willcox | 3,236 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Yuma | AZ0414024 | Yuma | 103,264 | <MRL | <MRL | 0 | No PFAS detected |
| Clarkdale Municipal Water System | AZ0413024 | Clarkdale | 5,201 | <MRL | <MRL | 0 | No PFAS detected |
| Cocopah Casino | 090400673 | Somerton | 5,300 | <MRL | <MRL | 0 | No PFAS detected |
| Colorado River Regional Water System | 090400051 | Parker | 3,476 | <MRL | <MRL | 0 | No PFAS detected |
| Community Wc Of Green Valley | AZ0410004 | Green Valley | 22,085 | <MRL | <MRL | 0 | No PFAS detected |
| Copper Mountain Ranch Cfd | AZ0411328 | Casa Grande | 1,071 | <MRL | <MRL | 0 | No PFAS detected |
| Cottonwood Municipal Water Cw1 | AZ0413025 | Cottonwood | 11,288 | <MRL | <MRL | 0 | Other PFAS detected |
| Cottonwood Municipal Water Vv6 | AZ0413106 | Cottonwood | 4,518 | <MRL | <MRL | 0 | No PFAS detected |
| Cs Old Concho Water Users | AZ0401011 | St. Louis | 40 | <MRL | <MRL | 0 | No PFAS detected |
| Cs Tierra Mesa Estates Water Company | AZ0414080 | St. Louis | 632 | <MRL | <MRL | 0 | No PFAS detected |
| Desert Hills Water | AZ0407026 | Cave Creek | 4,220 | <MRL | <MRL | 0 | No PFAS detected |
| Desert Oasis | AZ0407523 | Surprise | 23,963 | <MRL | <MRL | 0 | No PFAS detected |
| Dilkon-Indian Wells-Greasewood-White Cone Ntua | NN0400342 | Fort Defiance | 4,986 | <MRL | <MRL | 0 | No PFAS detected |
| Doney Park Water | AZ0403005 | Flagstaff | 9,222 | <MRL | <MRL | 0 | No PFAS detected |
| Douglas City Of | AZ0402014 | Douglas | 16,656 | <MRL | <MRL | 0 | No PFAS detected |
| Eagar Town Of | AZ0401004 | Eagar | 4,590 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| El Mirage City Of | AZ0407091 | El Mirage | 39,884 | 4 | <MRL | 0.004 | PFOA 1–3 × its limit |
| Eloy City Of | AZ0411030 | Eloy | 8,999 | <MRL | <MRL | 0 | No PFAS detected |
| Epcor - Agua Fria | AZ0407695 | El Mirage | 128,040 | <MRL | <MRL | 0 | No PFAS detected |
| Epcor - Anthem | AZ0407504 | El Mirage | 23,826 | <MRL | <MRL | 0 | No PFAS detected |
| Epcor - Chaparral City | AZ0407017 | El Mirage | 26,026 | <MRL | <MRL | 0 | No PFAS detected |
| Epcor - Lake Havasu | AZ0408015 | El Mirage | 4,712 | <MRL | <MRL | 0 | No PFAS detected |
| Epcor - North East Agua Fria | AZ0407531 | El Mirage | 14,723 | <MRL | <MRL | 0 | No PFAS detected |
| Epcor - Paradise Valley/Scottsdale | AZ0407056 | El Mirage | 14,107 | <MRL | <MRL | 0 | No PFAS detected |
| Epcor - San Tan | AZ0411128 | San Tan Valley | 87,435 | <MRL | <MRL | 0 | No PFAS detected |
| Epcor - San Tan Anthem | AZ0411136 | San Tan Valley | 10,362 | 19 | <MRL | 0.012 | PFOA ≥ 3 × its limit |
| Epcor - Sun City | AZ0407099 | El Mirage | 38,016 | <MRL | <MRL | 0 | No PFAS detected |
| Epcor - Sun City West | AZ0407150 | El Mirage | 25,796 | <MRL | <MRL | 0 | No PFAS detected |
| Epcor - Tierra Del Rio | AZ0407532 | El Mirage | 4,868 | <MRL | <MRL | 0 | No PFAS detected |
| Epcor - Willow Valley/King Street | AZ0408040 | El Mirage | 3,566 | <MRL | <MRL | 0 | No PFAS detected |
| Epcor- Rio Verde | AZ0407121 | El Mirage | 5,330 | <MRL | <MRL | 0 | No PFAS detected |
| Festival Ranch | AZ0407765 | Buckeye | 10,313 | <MRL | <MRL | 0 | No PFAS detected |
| Flagstaff City Of | AZ0403008 | Flagstaff | 79,796 | <MRL | <MRL | 0 | Other PFAS detected |
| Florence Water Company | AZ0411017 | Florence | 14,593 | <MRL | <MRL | 0.73 | Hazard Index below its limit |
| Flowing Wells Irrigation District | AZ0410051 | Tucson | 16,000 | 5 | 6 | 0.902 | PFOS 1–3 × its limit |
| Foothills Water And Sewer Llc | AZ0414004 | Yuma | 32,425 | <MRL | <MRL | 0 | No PFAS detected |
| Fort Defiance-Window Rock-St Michaels Ntua | NN0403000 | Ft Defiance | 12,869 | <MRL | <MRL | 0 | No PFAS detected |
| Fort Mcdowell Community | 090400088 | Fountain Hills | 7,260 | <MRL | <MRL | 0 | No PFAS detected |
| Ganado Public Schools | NN0400289 | Ganado | 684 | <MRL | <MRL | 0 | No PFAS detected |
| Ganado-Burnside-Cornfield-Steamboat Ntua | NN0403001 | Ft Defiance | 3,947 | <MRL | <MRL | 0.61 | Hazard Index below its limit |
| Gilbert, Town Of | AZ0407092 | Gilbert | 247,600 | 6.5 | 9.8 | 0.009 | PFOS 1–3 × its limit |
| Glen Canyon Nra Wahweap | AZ0403712 | Page | 579 | <MRL | <MRL | 0 | Other PFAS detected |
| Glendale City Of | AZ0407093 | Phoenix | 234,766 | <MRL | <MRL | 0.006 | Hazard Index below its limit |
| Globe City Of | AZ0404008 | Globe | 7,536 | <MRL | 9.5 | 2.427 | Hazard Index 1–3 × its limit |
| Golden Shores Water Company | AZ0408024 | Phoenix | 3,970 | <MRL | <MRL | 0 | No PFAS detected |
| Golden Valley Improvement District | AZ0408081 | Kingman | 3,950 | <MRL | <MRL | 0 | No PFAS detected |
| Goodyear Water Department | AZ0407094 | Goodyear | 50,001 | 4.8 | 7.9 | 1.042 | PFOS 1–3 × its limit |
| Grand Canyon National Park | AZ0403702 | Grand Canyon | 16,590 | <MRL | <MRL | 0 | No PFAS detected |
| Greasewood Springs Community Boarding School Bia | NN0436008 | Ganado | 720 | <MRL | <MRL | 0 | No PFAS detected |
| Green Valley Dwid | AZ0410157 | Green Valley | 8,687 | <MRL | <MRL | 0 | No PFAS detected |
| Gric Dpw Sacaton | 090400047 | Sacaton | 5,307 | <MRL | <MRL | 0 | No PFAS detected |
| Gric Dpw Wild Horse Pass | 090400692 | Sacaton | 22,795 | <MRL | <MRL | 0 | No PFAS detected |
| Gw Farmers Water Co - Continental | AZ0410049 | Maricopa | 4,475 | <MRL | <MRL | 0 | No PFAS detected |
| Gw Farmers Water Co - Santa Rita Springs | AZ0410213 | Maricopa | 3,235 | <MRL | 5 | 0.403 | PFOS 1–3 × its limit |
| Gw Saguaro Dist Water Co - Las Quintas | AZ0410064 | Maricopa | 3,055 | <MRL | <MRL | 0 | No PFAS detected |
| Gw Santa Cruz Water Co | AZ0411131 | Maricopa | 84,000 | <MRL | <MRL | 0 | No PFAS detected |
| Holbrook City Of | AZ0409015 | Holbrook | 4,833 | <MRL | <MRL | 0 | No PFAS detected |
| Kachina Village Dwid | AZ0403013 | Flagstaff | 3,500 | <MRL | <MRL | 0 | No PFAS detected |
| Katherine Resorts Water Company | AZ0408018 | La Jolla | 58 | <MRL | <MRL | 0 | No PFAS detected |
| Kayenta Ntua | NN0403003 | Ft Defiance | 3,844 | <MRL | <MRL | 0 | Other PFAS detected |
| Kingman Municipal Water | AZ0408020 | Kingman | 45,000 | <MRL | <MRL | 0 | No PFAS detected |
| Lago Del Oro Water Company | AZ0411117 | Tucson | 18,132 | <MRL | <MRL | 0 | Other PFAS detected |
| Lake Havasu City Of | AZ0408022 | Lake Havasu City | 54,610 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Liberty Water Lpsco | AZ0407046 | Litchfield Park | 57,070 | 10.2 | 14.1 | 1.893 | PFOS ≥ 3 × its limit |
| Liberty Water Rio Rico | AZ0412011 | Sierra Vista | 17,960 | 10 | 40.9 | 1.096 | PFOS ≥ 3 × its limit |
| Lone Butte Industrial | 090400345 | Chandler | 3,810 | <MRL | <MRL | 0 | No PFAS detected |
| Marana Municipal - Hartman Vistas | AZ0410329 | Tucson | 5,408 | <MRL | 23 | 1.5 | PFOS ≥ 3 × its limit |
| Marana Municipal - Marana | AZ0410150 | Marana | 15,162 | 6.3 | 17.9 | 2.071 | PFOS ≥ 3 × its limit |
| Marana Municipal - Picture Rocks | AZ0410092 | Tucson | 5,270 | <MRL | <MRL | 0.004 | Hazard Index below its limit |
| Mesa City Of | AZ0407095 | Mesa | 466,000 | <MRL | <MRL | 0.93 | Hazard Index below its limit |
| Metropolitan Dwid | AZ0410076 | Tucson | 45,570 | <MRL | <MRL | 0.392 | Hazard Index below its limit |
| Metropolitan Dwid - Diablo Village | AZ0410357 | Tucson | 5,542 | <MRL | <MRL | 0 | No PFAS detected |
| Metropolitan Dwid - Hub | AZ0410060 | Tucson | 4,252 | <MRL | <MRL | 0 | No PFAS detected |
| Mission Palms Apartments | AZ0420570 | Tucson | 720 | <MRL | <MRL | 0 | No PFAS detected |
| Morenci Water Elec Co Main | AZ0406003 | Phoenix | 4,078 | <MRL | <MRL | 0.013 | Hazard Index below its limit |
| Nogales City Of | AZ0412004 | Nogales | 22,000 | <MRL | <MRL | 0 | No PFAS detected |
| North Mohave Valley | AZ0408068 | Bullhead City | 5,190 | <MRL | 5.5 | 0.342 | PFOS 1–3 × its limit |
| Oro Valley Water Countryside | AZ0410175 | Oro Valley | 6,031 | <MRL | <MRL | 0 | No PFAS detected |
| Oro Valley Water Utility | AZ0410164 | Oro Valley | 42,316 | <MRL | <MRL | 0 | No PFAS detected |
| Page City Of | AZ0403017 | Page | 7,445 | <MRL | <MRL | 0 | No PFAS detected |
| Patagonia Water Department | AZ0412006 | Patagonia | 819 | <MRL | <MRL | 0 | No PFAS detected |
| Payson Town Of | AZ0404032 | Payson | 17,682 | 40.9 | 42.2 | 2.297 | PFOS ≥ 3 × its limit |
| Peoria City Of | AZ0407096 | Peoria | 187,676 | 5.6 | <MRL | 0.372 | PFOA 1–3 × its limit |
| Phoenix City Of | AZ0407025 | Phoenix | 1,695,000 | <MRL | <MRL | 0.008 | Hazard Index below its limit |
| Phoenix International Raceway | AZ0407406 | Avondale | 4,500 | <MRL | 10 | 0 | PFOS 1–3 × its limit |
| Pima Utilities | AZ0407120 | Phoenix | 20,000 | <MRL | <MRL | 0 | No PFAS detected |
| Pine Strawberry Wid | AZ0404034 | Pine | 8,013 | <MRL | <MRL | 0 | Other PFAS detected |
| Pinon-District 4 Ntua | NN0403004 | Ft Defiance | 5,195 | <MRL | <MRL | 0 | No PFAS detected |
| Polacca | 090400106 | Polacca | 3,890 | <MRL | <MRL | 0 | No PFAS detected |
| Ponderosa Dwid | AZ0409023 | Pinetop | 5,375 | <MRL | <MRL | 0.006 | Hazard Index below its limit |
| Ponderosa Park Dwid | AZ0413044 | Prescott | 602 | 7 | 4.7 | 0.622 | PFOA 1–3 × its limit |
| Prescott City Of | AZ0413045 | Prescott | 42,217 | 11.4 | 8.7 | 0.654 | PFOA 1–3 × its limit |
| Pueblo Del Sol Water Company | AZ0402044 | Sierra Vista | 12,804 | <MRL | <MRL | 0 | No PFAS detected |
| Quail Creek Water Company | AZ0410262 | Tucson | 6,812 | <MRL | <MRL | 0 | No PFAS detected |
| Queen Creek Town Of | AZ0407033 | Queen Creek | 95,502 | <MRL | <MRL | 0 | No PFAS detected |
| Ray Water Company Inc | AZ0410095 | Tucson | 4,495 | <MRL | <MRL | 0 | No PFAS detected |
| Rose Valley Water Company | AZ0407065 | Yuma | 6,202 | <MRL | <MRL | 0 | No PFAS detected |
| Safford City Of | AZ0405005 | Safford | 20,600 | <MRL | <MRL | 0.072 | Hazard Index below its limit |
| Sahuarita Water Company | AZ0410312 | Sahuarita | 18,178 | <MRL | <MRL | 0 | No PFAS detected |
| Salt River Public Works | 090400109 | Scottsdale | 20,951 | <MRL | <MRL | 0 | No PFAS detected |
| San Luis City Of | AZ0414005 | San Luis | 39,705 | <MRL | <MRL | 0 | No PFAS detected |
| Scottsdale City Of | AZ0407098 | Scottsdale | 241,361 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Scua Upper Seven Mile | 090400114 | San Carlos | 8,478 | <MRL | <MRL | 0.027 | Hazard Index below its limit |
| Sells Intertie | 090400042 | Sells | 4,000 | <MRL | <MRL | 0 | No PFAS detected |
| Snowflake Town Of | AZ0409029 | Snowflake | 5,590 | <MRL | <MRL | 0 | No PFAS detected |
| Somerton City Of | AZ0414015 | Somerton | 14,197 | <MRL | <MRL | 0 | No PFAS detected |
| St Johns City Of | AZ0401012 | Saint Johns | 3,500 | <MRL | <MRL | 0 | No PFAS detected |
| Sunrise Water Company | AZ0407070 | Peoria | 6,500 | <MRL | <MRL | 0 | No PFAS detected |
| Surprise City Of - Mountain Vista | AZ0407500 | Surprise | 40,007 | <MRL | <MRL | 0 | No PFAS detected |
| Talking Stick Resort | 090400707 | Scottsdale | 12,087 | <MRL | <MRL | 0 | No PFAS detected |
| Tempe City Of | AZ0407100 | Tempe | 165,000 | 38.7 | 55.8 | 7.063 | PFOS ≥ 3 × its limit |
| Tolleson City Of | AZ0407101 | Tolleson | 9,300 | <MRL | <MRL | 0.007 | Hazard Index below its limit |
| Town Of Camp Verde Utilities | AZ0413015 | Camp Verde | 5,380 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Prescott Valley | AZ0413048 | Dewey | 57,048 | <MRL | <MRL | 0 | No PFAS detected |
| Tuba City Ntua | NN0400206 | Fort Defiance | 6,276 | <MRL | <MRL | 0 | No PFAS detected |
| Tucson City Of | AZ0410112 | Tucson | 732,906 | <MRL | <MRL | 0 | Other PFAS detected |
| Tucson Country Day School | AZ0420018 | Tucson | 800 | <MRL | <MRL | 0 | No PFAS detected |
| Tucson Water Corona De Tucson | AZ0410169 | Tucson | 10,217 | <MRL | <MRL | 0 | No PFAS detected |
| Ua Tech Park - Rita Road | AZ0420567 | Tucson | 3,000 | <MRL | <MRL | 0 | No PFAS detected |
| University Of Arizona | AZ0420423 | Tucson | 50,000 | <MRL | <MRL | 0 | Other PFAS detected |
| Us Army Fort Huachuca | AZ0402078 | Dragoon | 15,603 | 7 | 6.5 | 1.47 | PFOA 1–3 × its limit |
| Usaf Davis Monthan Afb | AZ0420549 | Davis-Monthan Afb | 18,640 | <MRL | <MRL | 0 | No PFAS detected |
| Usaf Luke Air Force Base | AZ0407305 | Luke Afb | 8,440 | 10 | 11.7 | 0.873 | PFOS 1–3 × its limit |
| Usmc Yuma Main System | AZ0414082 | Yuma | 8,353 | <MRL | <MRL | 0.31 | Hazard Index below its limit |
| Vail Water Company | AZ0410041 | Vail | 17,500 | <MRL | <MRL | 0 | No PFAS detected |
| Valley Pioneers Water Company Inc | AZ0408038 | Golden Valley | 6,263 | <MRL | <MRL | 0 | No PFAS detected |
| Valley Utilities Water Company Glendale | AZ0407079 | Glendale | 6,003 | <MRL | <MRL | 0 | Other PFAS detected |
| Vaya Chin Intertie | 090400020 | Sells | 1,151 | <MRL | <MRL | 0 | No PFAS detected |
| Voyager Water Company | AZ0410035 | Tucson | 3,121 | <MRL | <MRL | 0 | No PFAS detected |
| Wickenburg Town Of | AZ0407045 | Wickenburg | 6,581 | <MRL | <MRL | 0 | No PFAS detected |
| Winslow City Of | AZ0409035 | Winslow | 9,789 | <MRL | <MRL | 0 | No PFAS detected |
| Wmatua Miner Flat | 090400693 | Whiteriver | 15,570 | <MRL | <MRL | 0 | No PFAS detected |
| Yavapai Apache - Cliff Castle | 090400117 | Camp Verde | 2,016 | <MRL | <MRL | 0 | No PFAS detected |
Not tested under UCMR 5 (970)
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 |
|---|---|---|---|---|---|
| 67 Ave Property Owners Association | AZ0407280 | CWS | Phoenix | 40 | Maricopa County |
| 88 Shades Rv Park | AZ0415435 | CWS | Quartzsite | 488 | La Paz County |
| A Petersen Water Company | AZ0409032 | CWS | Tucson | 160 | Navajo County |
| A1 Ranch Dwid | AZ0403087 | CWS | Flagstaff | 45 | Coconino County |
| Abra Water Company | AZ0413001 | CWS | Paulden | 1,932 | Yavapai County |
| Acme Water - Blue Hills | AZ0413055 | CWS | Phoenix | 138 | Yavapai County |
| Acme Water - Yavapai Estates | AZ0413077 | CWS | Phoenix | 243 | Yavapai County |
| Acme Water -Dells Water | AZ0413029 | CWS | Phoenix | 163 | Yavapai County |
| Adaman Mutual Water Company | AZ0407001 | CWS | Litchfield Park | 700 | Maricopa County |
| Adjc Adobe Mountain School | AZ0407307 | CWS | Phoenix | 680 | Maricopa County |
| Adoc Aspc Fort Grant | AZ0405303 | CWS | Safford | 800 | Graham County |
| Adot Airport Grand Canyon | AZ0403010 | CWS | Phoenix | 1,140 | Coconino County |
| Adot Border Patrol | AZ0412019 | NTNCWS | Tonopah | 100 | Santa Cruz County |
| Aguila Elementary School | AZ0407478 | NTNCWS | Aguila | 200 | Maricopa County |
| Aguila Water Service | AZ0407003 | CWS | Sun City | 995 | Maricopa County |
| Ajo Dwid | AZ0410153 | CWS | Ajo | 405 | Pima County |
| Ajo Improvement Company | AZ0410001 | CWS | Ajo | 2,654 | Pima County |
| Ak-Chin Santa Cruz Commerce Center | 090400094 | NTNCWS | Maricopa | 94 | |
| Ak-Chin Southern Dunes Golf Club | 090400098 | NTNCWS | Maricopa | 270 | |
| Alco Center | AZ0413066 | NTNCWS | Huntington Beach | 100 | Yavapai County |
| Alpine Dwid | AZ0401001 | CWS | Alpine | 1,320 | Apache County |
| American Indian Christian Mission | AZ0409074 | CWS | Show Low | 37 | Navajo County |
| American Ranch Dwid | AZ0413258 | CWS | Prescott | 140 | Yavapai County |
| American Realty Mortgage Company | AZ0411301 | CWS | Maricopa | 60 | Pinal County |
| Antelope Peak Dwid | AZ0411712 | CWS | Maricopa | 150 | Pinal County |
| Antelope Union High School | AZ0414044 | NTNCWS | Wellton | 250 | Yuma County |
| Anway Manville Water Company | AZ0410354 | CWS | Tucson | 550 | Pima County |
| Apache Acres Mhp | AZ0409316 | CWS | Scottsdale | 150 | Navajo County |
| Apache Gold Casino | 090400698 | NTNCWS | San Carlos | 1,475 | |
| Apache Lake Marina Resort | AZ0407630 | CWS | Gilbert | 123 | Maricopa County |
| Apache Mobile Home And Rv Park, Llc | AZ0404300 | CWS | Chandler | 130 | Gila County |
| Apache Nitrogen Products | AZ0402300 | NTNCWS | Benson | 70 | Cochise County |
| Apache Sky Casino | 090400667 | NTNCWS | San Carlos | 400 | |
| Appaloosa Water Company | AZ0413208 | CWS | Chino Valley | 600 | Yavapai County |
| Aps - Yucca Water | AZ0414312 | NTNCWS | Palo Verde | 27 | Yuma County |
| Aps Redhawk Water | AZ0407740 | NTNCWS | Palo Verde | 60 | Maricopa County |
| Aravaipa Water Company | AZ0411003 | CWS | Hayden | 60 | Pinal County |
| Arcosanti Camp | AZ0413341 | CWS | Mayer | 115 | Yavapai County |
| Arivaca Townsite Water Coop | AZ0410002 | CWS | Arivaca | 150 | Pima County |
| Arizona Proving Ground | AZ0407763 | NTNCWS | Wittmann | 75 | Maricopa County |
| Arizona Proving Ground | AZ0408316 | NTNCWS | Yucca | 271 | Mohave County |
| Arizona Training Program | AZ0411037 | CWS | Phoenix | 470 | Pinal County |
| Arizona Village | 090400300 | CWS | Needles | 3,211 | Mohave County |
| Arizona Water Co - Ajo | AZ0410003 | CWS | Phoenix | 2,100 | Pima County |
| Arizona Water Co - Stanfield | AZ0411012 | CWS | Phoenix | 628 | Pinal County |
| Arizona Water Co - Tierra Grande | AZ0411076 | CWS | Phoenix | 1,819 | Pinal County |
| Arizona Water Co - Winkelman | AZ0404003 | CWS | Phoenix | 393 | Gila County, Pinal County |
| Arizonian Rv Resort | AZ0411708 | CWS | Gold Canyon | 225 | Pinal County |
| Arroyo Water Company | AZ0404083 | CWS | Payson | 150 | Gila County |
| Asarco Hayden Operations | AZ0404012 | NTNCWS | Hayden | 417 | Gila County, Pinal County |
| Asarco Hayden Smelter | AZ0404001 | NTNCWS | Hayden | 24 | Gila County, Pinal County |
| Asarco Mission Unit | AZ0420005 | NTNCWS | Sahuarita | 586 | Pima County |
| Ash Creek Elementary School | AZ0402071 | NTNCWS | Pearce | 50 | Cochise County |
| Ash Creek Water Company | AZ0405007 | CWS | Pima | 310 | Graham County |
| Ash Fork Water Service | AZ0413008 | CWS | Ash Fork | 2,350 | Yavapai County |
| Ashley Rose Mhp | AZ0402105 | CWS | Scottdale | 50 | Cochise County |
| Aspc Apache | AZ0401056 | CWS | St. Johns | 540 | Apache County |
| Avalon Gardens Water System | AZ0412044 | CWS | Tubac | 100 | Santa Cruz County |
| Averys | AZ0401345 | NTNCWS | Springerville | 90 | Apache County |
| Avi Kwa Ame Farms North | 090400304 | CWS | Needles | 40 | Mohave County |
| Awc - Casa Grande South Water Company | AZ0411061 | CWS | Phoenix | 176 | Pinal County |
| Awc - Casa Grande West Water Company | AZ0411024 | CWS | Phoenix | 951 | Pinal County |
| Awc - Coolidge City Of Municipal Airport | AZ0411707 | NTNCWS | Phoenix | 40 | Pinal County |
| Awc - Valley Vista | AZ0413114 | CWS | Phoenix | 1,788 | Yavapai County |
| Az Electric Power Apache | AZ0402355 | NTNCWS | Cochise | 100 | Cochise County |
| Baby Rocks Ntua | NN0400824 | CWS | Ft Defiance | 44 | |
| Baca Float Water Company | AZ0412037 | CWS | Glendale | 1,162 | Santa Cruz County |
| Bacavi Village | 090400687 | CWS | Hotevilla | 943 | Navajo County |
| Bayer R&D Services Llc - Marana | AZ0410200 | NTNCWS | Tucson | 160 | Pima County |
| Beardsley Water Company 3 | AZ0407511 | CWS | Litchfield Park | 96 | Maricopa County |
| Bearizona | AZ0403105 | CWS | Williams | 1,423 | Coconino County |
| Beaver Creek School | AZ0413084 | NTNCWS | Rimrock | 400 | Yavapai County |
| Beaver Creek Store | AZ0413351 | CWS | Rimrock | 100 | Yavapai County |
| Beaver Dam East Dwid | AZ0408127 | CWS | Littlefield | 47 | Mohave County |
| Beaver Dam Filling Station | AZ0408057 | CWS | Littlefield | 35 | Mohave County |
| Beaver Dam Wc System 1 | AZ0408006 | CWS | Littlefield | 1,048 | Mohave County |
| Beaver Dam Wc System 2 | AZ0408093 | CWS | Littlefield | 162 | Mohave County |
| Beaver Dam Wc System 3 | AZ0408177 | CWS | Littlefield | 75 | Mohave County |
| Beaver Valley Water Company | AZ0404004 | CWS | Payson | 150 | Gila County |
| Bella Capri Mhp | AZ0420445 | CWS | Tucson | 342 | Pima County |
| Bella Vista Water South | AZ0402007 | CWS | Sierra Vista | 2,178 | Cochise County |
| Bellemont Water Company | AZ0403394 | NTNCWS | Flagstaff | 100 | Coconino County |
| Belmont Mountain Dairy | AZ0407736 | CWS | Tonopah | 72 | Maricopa County |
| Bent River Apt Enchantment Resort | AZ0413267 | CWS | Clarkdale | 50 | Yavapai County |
| Berneil Water Company | AZ0407008 | CWS | Tempe | 1,388 | Maricopa County |
| Beverly Gardens Trailer Park | AZ0413408 | CWS | Prescott | 120 | Yavapai County |
| Bia Keams Canyon | 090400054 | CWS | Keams Canyon | 925 | Navajo County |
| Bia San Carlos | 090400060 | NTNCWS | San Carlos | 2,150 | |
| Biasi Water Company | AZ0408138 | CWS | Beaver Dam | 284 | Mohave County |
| Bidegain Water Company | AZ0411022 | CWS | Kearny | 49 | Pinal County |
| Big River Development | 090600226 | CWS | Big River | 3,550 | La Paz County |
| Bisbee Douglas Intl Airport | AZ0402061 | CWS | Douglas | 1,700 | Cochise County |
| Black Canyon City Wid | AZ0413051 | CWS | Tucson | 2,437 | Yavapai County |
| Blu Water Company | AZ0408169 | NTNCWS | Las Vegas | 30 | Mohave County |
| Blue Ridge Dwid | AZ0403063 | CWS | Happy Jack | 1,920 | Coconino County |
| Bonita Creek Water Company | AZ0404024 | CWS | Payson | 67 | Gila County |
| Bonita Public School | AZ0405006 | NTNCWS | Willcox | 128 | Graham County |
| Bouse Dwid | AZ0415038 | CWS | Bouse | 284 | La Paz County |
| Bouse Elementary School | AZ0415115 | NTNCWS | Bouse | 55 | La Paz County |
| Bowie Wid | AZ0402006 | CWS | Tucson | 453 | Cochise County |
| Bradshaw Mountain View Water | AZ0413062 | CWS | Mayer | 1,149 | Yavapai County |
| Bradshaw Water Company Inc | AZ0413141 | CWS | Prescott | 510 | Yavapai County |
| Breezeway Trailer Park | AZ0411315 | CWS | Kearny | 38 | Pinal County |
| Brophy College Preparatory | AZ0407182 | NTNCWS | Phoenix | 1,500 | Maricopa County |
| Buckeye Acres Mhp | AZ0407392 | CWS | Phoenix | 71 | Maricopa County |
| Buckeye Armed Forces Reserve Center | AZ0407790 | NTNCWS | Phoenix, | 63 | Maricopa County |
| Buckeye Estates | AZ0407343 | CWS | Buckeye | 300 | Maricopa County |
| Buckskin Artists Community | AZ0409305 | CWS | Heber | 320 | Navajo County |
| Buenos Aires National Wildlife Refuge | AZ0410271 | NTNCWS | Sasabe | 54 | Pima County |
| C-Oasis Park | AZ0413423 | CWS | Albuqueque | 54 | Yavapai County |
| Caballeros Water Company | AZ0407012 | CWS | Wickenburg | 100 | Maricopa County |
| Cactus Country Rv Resort | AZ0420197 | CWS | Tucson | 420 | Pima County |
| Calportland - Rillito Cement Plant | AZ0420011 | NTNCWS | Rillito | 184 | Pima County |
| Cameron Ntua | NN0403010 | CWS | Fort Defiance | 742 | |
| Cameron Trading Post | AZ0403006 | CWS | Cameron | 1,270 | Coconino County |
| Cammies Foothills Vista Mhc | AZ0420575 | CWS | Tucson | 62 | Pima County |
| Camp Mohave | AZ0408037 | CWS | Bullhead City | 224 | Mohave County |
| Camp Navajo | AZ0403344 | NTNCWS | Bellemont | 350 | Coconino County |
| Camp Verde School Dist 28 | AZ0413081 | NTNCWS | Camp Verde | 1,810 | Yavapai County |
| Campbell Avenue Farms | AZ0420490 | NTNCWS | Tucson | 65 | Pima County |
| Campbell Estates Mhp | AZ0420019 | CWS | Tucson | 450 | Pima County |
| Canam Steel Corporation | AZ0407745 | NTNCWS | Point Of Rocks | 100 | Maricopa County |
| Cane Valley Ntua | NN4903073 | CWS | Ft Defiance | 58 | |
| Canyon De Chelly National Monument | NN0403022 | CWS | Chinle | 55 | |
| Canyon Vista Estates | AZ0409091 | CWS | Tucson | 68 | Navajo County |
| Canyon Water Improvement District | AZ0404112 | CWS | Globe | 130 | Gila County |
| Carl T Hayden Veterans Medical Center | AZ0407580 | NTNCWS | Phoenix | 6,293 | Maricopa County |
| Carolanne Drive Hoa | AZ0420529 | CWS | Tucson | 72 | Pima County |
| Casas Arroyo Association Inc | AZ0412020 | CWS | Sonoita | 27 | Santa Cruz County |
| Casitas De Castilian | AZ0420531 | CWS | Tucson | 167 | Pima County |
| Catalina Country Estates | AZ0420500 | CWS | Tucson | 77 | Pima County |
| Catalina Village | AZ0410219 | CWS | Tucson | 107 | Pima County |
| Caterpillar Inc | AZ0410258 | NTNCWS | Green Valley | 200 | Pima County |
| Cathedral Rock Estates Water Coop | AZ0413119 | CWS | Sedona | 19 | Yavapai County |
| Cathedral Vista Water Company | AZ0413016 | CWS | Sedona | 196 | Yavapai County |
| Cedar Grove Water Company | AZ0401049 | CWS | Tucson | 1,564 | Apache County |
| Centennial Park Dwid | AZ0408090 | CWS | Colorado City | 1,839 | Mohave County |
| Central Az College Aravaipa | AZ0411077 | NTNCWS | Casa Grande | 100 | Pinal County |
| Chandler Heights Citrus Irrigation Dist | AZ0407409 | CWS | Chandler Heights | 2,620 | Maricopa County |
| Chaparral Water Company | AZ0407064 | CWS | Tucson | 963 | Maricopa County |
| Charco 27 | 090400008 | CWS | Sells | 70 | Pima County |
| Chemehuevi Water | 090600125 | CWS | Havasu Lake | 2,200 | Mohave County |
| Chief Sleep Easy Tp | AZ0408089 | CWS | St George | 124 | Mohave County |
| Chilchinbeto Community Day School Bia | NN0433002 | CWS | Kayenta | 138 | |
| Chilchinbeto Ntua | NN0400290 | CWS | Ft Defiance | 1,276 | |
| Chimney Estates | AZ0413193 | CWS | Mayer | 90 | Yavapai County |
| Chinle High School | NN0403062 | NTNCWS | Chinle | 975 | |
| Chinle Usd 24 Administration Center | NN0403060 | CWS | Chinle | 220 | |
| Chino Meadows Ii | AZ0413079 | CWS | Chino Valley | 2,350 | Yavapai County |
| Chino Valley Park | AZ0413431 | CWS | Chino Valley | 65 | Yavapai County |
| Chino Valley Town Complex | AZ0413218 | NTNCWS | Prescott Valley | 107 | Yavapai County |
| Chino Valley Town Of | AZ0413137 | CWS | Prescott Valley | 2,742 | Yavapai County |
| Chloride Dwid | AZ0408005 | CWS | Chloride | 350 | Mohave County |
| Chui Chu | 090400003 | CWS | Sells | 420 | Pinal County |
| Cibola Water Improvement District | AZ0415123 | CWS | St. Louis | 197 | La Paz County |
| Cienega Water Company Inc | AZ0415002 | CWS | Parker | 108 | La Paz County |
| Circle City - City Of Surprise | AZ0407112 | CWS | Surprise | 897 | Maricopa County |
| City Of Buckeye Tartesso Water System | AZ0407526 | CWS | Buckeye | 10,123 | Maricopa County |
| City Of Hope - Phoenix | AZ0407795 | NTNCWS | Newton | 700 | Maricopa County |
| Clay Springs Dwid | AZ0409009 | CWS | Lakeside | 425 | Navajo County |
| Clear Creek Rv Park | AZ0413415 | CWS | Camp Verde | 25 | Yavapai County |
| Clear Springs Utility Main | AZ0402008 | CWS | Glendale | 1,385 | Cochise County |
| Clear Springs Utility Well 6 | AZ0402049 | CWS | Glendale | 48 | Cochise County |
| Clearwater Utility Company Inc | AZ0407019 | CWS | Buckeye | 2,747 | Maricopa County |
| Cloud Nine Water Company | AZ0402009 | CWS | Tucson | 143 | Cochise County |
| Coal Mine Mesa Ntua | NN0400207 | CWS | Fort Defiance | 393 | |
| Cochise College Park Water Assoc | AZ0402040 | CWS | Douglas | 83 | Cochise County |
| Cochise County Community College Distric | AZ0402063 | NTNCWS | Sierra Vista | 1,120 | Cochise County |
| Cochise Elementary School | AZ0402072 | NTNCWS | Cochise | 105 | Cochise County |
| Cocopah Bend Rv & Golf Resort | 090400676 | CWS | Somerton | 1,095 | Yuma County |
| Cocopah East | 090400073 | CWS | Somerton | 280 | Yuma County |
| Cocopah Tribal Headquarters Hauled Water | 090400070 | NTNCWS | Somerton | 25 | |
| Cocopah West | 090400071 | CWS | Somerton | 325 | Yuma County |
| Coldwater Canyon 1 | AZ0413020 | CWS | Tucson | 541 | Yavapai County |
| Coldwater Canyon 2 | AZ0413192 | CWS | Tucson | 245 | Yavapai County |
| Coldwater Canyon 3 | AZ0413202 | CWS | Tucson | 127 | Yavapai County |
| Comobabi Intertie | 090400220 | CWS | Sells | 240 | Pima County |
| Congress Dwid | AZ0413021 | CWS | Congress | 1,870 | Yavapai County |
| Coppermine Ntua | NN0400814 | CWS | Ft Defiance | 342 | |
| Cordes Junction Motel Rv Park | AZ0413067 | CWS | Mayer | 250 | Yavapai County |
| Cordes Lakes Water Company | AZ0413023 | CWS | Litchfield Park | 4,425 | Yavapai County |
| Coronado Elementary | AZ0402102 | NTNCWS | Hereford | 446 | Cochise County |
| Coronado Forest Drive Water Coop | AZ0420475 | CWS | Tucson | 34 | Pima County |
| Cottonwood Day School Bia | NN0435004 | CWS | Chinle | 185 | |
| Cottonwood Municipal Water Vsf1 | AZ0413164 | CWS | Cottonwood | 2,196 | Yavapai County |
| Cottonwood Municipal Water Vv 1 | AZ0413060 | CWS | Cottonwood | 783 | Yavapai County |
| Cottonwood Municipal Water Vv2 | AZ0413104 | CWS | Cottonwood | 2,891 | Yavapai County |
| Cottonwood Municipal Water Vv3 | AZ0413105 | CWS | Cottonwood | 1,450 | Yavapai County |
| Cottonwood-Tselani Ntua | NN0403021 | CWS | Ft Defiance | 1,334 | |
| Country Club Acres Water Inc | AZ0407021 | CWS | Wickenburg | 431 | Maricopa County |
| Cove Ntua | NN0403027 | CWS | Ft Defiance | 728 | |
| Covered Wells Regional | 090400006 | CWS | Sells | 740 | |
| Cowlic | 090400029 | CWS | Sells | 120 | |
| Crescent Manor Mhp | AZ0420026 | CWS | Tucson | 200 | Pima County |
| Crisantes Greenhouse Water System | AZ0412045 | NTNCWS | Amado | 60 | Santa Cruz County |
| Cross Creek Ranch | AZ0413256 | CWS | Sedona | 55 | Yavapai County |
| Crossroads Park Mhp | AZ0420096 | CWS | Tucson | 100 | Pima County |
| Crossroads Rv Park | AZ0408083 | CWS | Mohave Valley | 272 | Mohave County |
| Crown King Water Company | AZ0413027 | CWS | Glendale | 220 | Yavapai County |
| Cs Antelope Water Company | AZ0414001 | CWS | St. Louis | 163 | Yuma County |
| Cs Carter Water Company | AZ0411114 | CWS | St. Louis | 28 | Pinal County |
| Cs Christopher Creek Haven | AZ0404005 | CWS | St. Louis | 497 | Gila County |
| Cs Citrus Park Water Company | AZ0414107 | CWS | St. Louis | 102 | Yuma County |
| Cs El Prado Water Company | AZ0414442 | CWS | St. Louis | 404 | Yuma County |
| Cs Flagstaff Ranch Water Company | AZ0403088 | CWS | St. Louis | 350 | Coconino County |
| Cs Gadsden Water Company | AZ0414037 | CWS | St. Louis | 540 | Yuma County |
| Cs Gardner Water Company | AZ0404038 | CWS | St. Louis | 266 | Gila County |
| Cs Green Acres Water Company | AZ0414065 | CWS | St. Louis | 105 | Yuma County |
| Cs Harrisburg Utility Company | AZ0415029 | CWS | St. Louis | 1,759 | La Paz County |
| Cs High Country Pines Water Company | AZ0409329 | CWS | St. Louis | 668 | Navajo County |
| Cs Holiday Water Company | AZ0402018 | CWS | St. Louis | 395 | Cochise County |
| Cs Hydro Resources-Tusayan | AZ0403312 | CWS | St. Louis | 1,710 | Coconino County |
| Cs Lake Verde Water Company | AZ0413038 | CWS | St. Louis | 169 | Yavapai County |
| Cs Loma Estates Water Company | AZ0413110 | NTNCWS | St. Louis | 92 | Yavapai County |
| Cs Loma Linda Water Company | AZ0406005 | CWS | St. Louis | 351 | Greenlee County |
| Cs Los Cerros Water Company Inc | AZ0410128 | CWS | St. Louis | 2,613 | Pima County |
| Cs Mohawk Utility Company | AZ0414030 | CWS | St. Louis | 243 | Yuma County |
| Cs Mormon Lake Water Company | AZ0403014 | CWS | St. Louis | 353 | Coconino County |
| Cs Oak Creek Public Service Llc | AZ0413042 | CWS | St. Louis | 650 | Yavapai County |
| Cs Peeples Valley Water Company | AZ0413078 | CWS | St. Louis | 658 | Yavapai County |
| Cs Q Mountain Water Company | AZ0415096 | CWS | St. Louis | 1,224 | La Paz County |
| Cs Rancheros Bonitos Water Company | AZ0414073 | CWS | St. Louis | 120 | Yuma County |
| Cs Santa Cruz Water Co | AZ0412012 | CWS | St. Louis | 82 | Santa Cruz County |
| Cs Sunizona Water Company | AZ0402036 | CWS | St. Louis | 136 | Cochise County |
| Cs Tonto Village Water Company | AZ0404023 | CWS | St. Louis | 512 | Gila County |
| Cs Verde Lee Water Company | AZ0406004 | CWS | St. Louis | 604 | Greenlee County |
| Cs Water Company | AZ0408072 | CWS | St. Louis | 258 | Mohave County |
| Cs West Village Water Company | AZ0403021 | CWS | St. Louis | 210 | Coconino County |
| Cs White Hills Water Company Unit 1 | AZ0408149 | CWS | St. Louis | 338 | Mohave County |
| Cs White Hills Water Company Units 3 4 6 | AZ0408039 | CWS | St. Louis | 333 | Mohave County |
| Cs Winchester Water Company | AZ0402110 | CWS | St. Louis | 402 | Cochise County |
| Cup Of Gold Water Company | AZ0413028 | CWS | Sedona | 42 | Yavapai County |
| Dateland Elementary School | AZ0414050 | NTNCWS | Dateland | 160 | Yuma County |
| Dateland Public Service Co | AZ0414003 | CWS | Dateland | 319 | Yuma County |
| Davis Ranch Land Owners | AZ0411090 | CWS | Marana | 40 | Pinal County |
| Del Pueblo Rv Park Tennis Resort | AZ0414106 | NTNCWS | Yuma | 600 | Yuma County |
| Dennehotso Boarding School Bia | NN0433004 | CWS | Dennehotso | 300 | |
| Dennehotso Ntua | NN0400296 | CWS | Ft Defiance | 1,040 | |
| Desert Diamond Sahuarita | 090400233 | NTNCWS | Tucson | 2,412 | |
| Desert Diamond Why | 090400234 | NTNCWS | Tucson | 362 | |
| Desert Foothills | AZ0408137 | CWS | Bullhead City | 3,091 | Mohave County |
| Desert Gardens Rv Resort Co-Op, Inc | AZ0411129 | CWS | Florence | 532 | Pinal County |
| Desert Paradise Mhp Llc | AZ0420546 | CWS | Amado | 90 | Pima County |
| Desert Shores Rv Mhp | AZ0420033 | CWS | Beverly Hills | 220 | Pima County |
| Desert Sky Dwid | AZ0415122 | CWS | Tucson | 72 | La Paz County |
| Desert Star Community School | AZ0413277 | NTNCWS | Cornville | 200 | Yavapai County |
| Desert Water Coop | AZ0410188 | CWS | Tucson | 150 | Pima County |
| Desert Winds Mobile Park | AZ0402353 | CWS | Sierra Vista | 34 | Cochise County |
| Diamond Grove Mobile Home Estates | AZ0420542 | CWS | Tucson | 385 | Pima County |
| Diamond Valley Water District | AZ0413017 | CWS | Humboldt | 2,000 | Yavapai County |
| Dilcon Community Boarding School Bia | NN0436006 | CWS | Winslow | 473 | |
| Dishchii Bikoh Community School - Bia Charter | 090400049 | CWS | Cibecue | 622 | Navajo County |
| Double Adobe School | AZ0402076 | NTNCWS | Mc Neal | 63 | Cochise County |
| Double R Water Distributors, Inc. | AZ0408178 | CWS | Glendale | 108 | Mohave County |
| Douglas Border Patrol Station | AZ0402123 | NTNCWS | Tucson | 450 | Cochise County |
| Dr Daniel Bright Elementary School | AZ0413175 | NTNCWS | Cottonwood | 300 | Yavapai County |
| Dragoon Water Company | AZ0402015 | CWS | Tucson | 286 | Cochise County |
| Duncan Elementary School | AZ0406006 | NTNCWS | Duncan | 450 | Greenlee County |
| Duncan Town Of | AZ0406001 | CWS | Duncan | 605 | Greenlee County |
| East Slope Water - West | AZ0402094 | CWS | Glendale | 655 | Cochise County |
| East Slope Water Company | AZ0402028 | CWS | Glendale | 2,012 | Cochise County |
| Eden Water Company Inc | AZ0405003 | CWS | Eden | 400 | Graham County |
| Ehrenberg Improvement District | AZ0415497 | CWS | Ehrenberg | 989 | La Paz County |
| Elfrida Wid | AZ0402017 | CWS | Elfrida | 800 | Cochise County |
| Elgin School | AZ0412035 | NTNCWS | Elgin | 150 | Santa Cruz County |
| Ellison Creek Cabin Owners' Association | AZ0404106 | NTNCWS | Cave Creek | 159 | Gila County |
| Empirita Water Company | AZ0402122 | CWS | Tucson | 120 | Cochise County |
| Enchantment Resort | AZ0413125 | NTNCWS | Sedona | 400 | Yavapai County |
| Epcor - Arizona Gateway | AZ0408163 | NTNCWS | El Mirage | 2,215 | Mohave County |
| Epcor - Holiday Harbor | AZ0415058 | CWS | El Mirage | 559 | La Paz County |
| Epcor - Lakeside | AZ0415010 | CWS | El Mirage | 1,775 | La Paz County |
| Epcor - Marina Village | AZ0415011 | CWS | El Mirage | 528 | La Paz County |
| Epcor - Moovalya Keys | AZ0415006 | CWS | El Mirage | 1,298 | La Paz County |
| Epcor - Parker Dam | AZ0415027 | CWS | El Mirage | 429 | La Paz County |
| Epcor - Rio Lindo | AZ0415040 | CWS | El Mirage | 79 | La Paz County |
| Epcor - Tubac | AZ0412001 | CWS | El Mirage | 2,076 | Santa Cruz County |
| Epcor - Willow Valley/Lake Cimarron | AZ0408129 | CWS | El Mirage | 596 | Mohave County |
| Escapees At North Ranch | AZ0413148 | CWS | Williams | 500 | Yavapai County |
| Ez Livin Rv Park | AZ0408074 | CWS | Littlefield | 40 | Mohave County |
| Faith Family Church | AZ0407911 | NTNCWS | Chandler | 200 | Maricopa County |
| Far Horizons East Mhp | AZ0420443 | CWS | Tucson | 870 | Pima County |
| Far Horizons Mhp | AZ0420042 | CWS | Tucson | 258 | Pima County |
| Federal Correction Institution | AZ0407700 | CWS | Phoenix | 1,500 | Maricopa County |
| Federal Correctional Inst | AZ0410187 | CWS | Tucson | 350 | Pima County |
| Fiesta Canning Co Inc | AZ0402399 | NTNCWS | Mcneal | 300 | Cochise County |
| First Steps Child Care | AZ0413151 | NTNCWS | Cottonwood | 40 | Yavapai County |
| Fishers Landing Resort | AZ0414039 | CWS | Yuma | 402 | Yuma County |
| Foothills Utilities Kingman East | AZ0408035 | CWS | Yuma | 2,538 | Mohave County |
| Foothills Utilities Kingman West | AZ0408341 | CWS | Yuma | 653 | Mohave County |
| Forest Highlands Water Company | AZ0403073 | CWS | Flagstaff | 1,681 | Coconino County |
| Forest Lake Ntua | NN0400182 | CWS | Ft Defiance | 233 | |
| Forest Lakes Water Improvement District | AZ0403032 | CWS | Forest Lakes | 1,746 | Coconino County |
| Fredonia Town Of | AZ0403009 | CWS | Fredonia | 1,327 | Coconino County, Mohave County |
| Freeport Mcmoran Bagdad Big Sandy | AZ0413126 | NTNCWS | Bagdad | 110 | Yavapai County |
| Freeport Mcmoran Bagdad Town | AZ0413011 | CWS | Bagdad | 3,200 | Yavapai County |
| Freeport Mcmoran Miami - Barney | AZ0404011 | NTNCWS | Claypool | 916 | Gila County |
| Freeport Mcmoran Safford | AZ0405312 | NTNCWS | Safford | 1,594 | Graham County |
| Fresnal | 090400004 | CWS | Sells | 105 | |
| G & L Mobile Park | AZ0414463 | CWS | Yuma | 90 | Yuma County |
| G Lazy B Mobile Home Park | AZ0407493 | CWS | Wickenburg | 25 | Maricopa County |
| Ganado Mission - Sage Memorial Hospital | NN0400320 | CWS | Ganado | 349 | |
| Gap-Cedar Ridge Ntua | NN0403009 | CWS | Fort Defiance | 1,125 | |
| Garigans Gulch Water Coop | AZ0410481 | CWS | Vail | 35 | Pima County |
| Gatlin Water Company Iwx | AZ0408091 | NTNCWS | Mohave Valley | 28 | Mohave County |
| Gator Water Company | AZ0410445 | CWS | Tucson | 29 | Pima County |
| Gentle Path At The Meadows | AZ0407515 | NTNCWS | Wickenburg | 60 | Maricopa County |
| Geronimo Estates | AZ0404028 | CWS | Payson | 212 | Gila County |
| Ghr Landowners Assn Water Coop | AZ0408150 | CWS | Bullhead City | 280 | Mohave County |
| Gila Bend Town Of | AZ0407069 | CWS | Gila Bend | 1,922 | Maricopa County |
| Gilbert Rigg Well Coop | AZ0407903 | CWS | Chandler | 95 | Maricopa County |
| Gilpins Trailer Park | AZ0413435 | NTNCWS | Paulden | 21 | Yavapai County |
| Gisela | AZ0404346 | CWS | Payson | 508 | Gila County |
| Goodman Water Company | AZ0411130 | CWS | Tucson | 2,668 | Pinal County |
| Gowan Milling Llc | AZ0414513 | NTNCWS | Somerton | 350 | Yuma County |
| Graham County Utilities - Pima | AZ0405002 | CWS | Pima | 3,899 | Graham County |
| Graham County Utilities-Fort Thomas | AZ0405001 | CWS | Pima | 452 | Graham County |
| Grand Canyon Junction Hydro | AZ0403084 | CWS | Mohave Valley | 430 | Coconino County |
| Grand Canyon West | 090400101 | CWS | Peach Springs | 3,120 | Mohave County |
| Grandview Water Company | AZ0407039 | CWS | Buckeye | 50 | Maricopa County |
| Granite Dells Water Company | AZ0413030 | CWS | Prescott | 50 | Yavapai County |
| Granite Mountain Water Company | AZ0413150 | CWS | Chino Valley | 381 | Yavapai County |
| Granite Oaks Water Users Association | AZ0413155 | CWS | Prescott | 1,200 | Yavapai County |
| Greater Santa Rosa Regional | 090400226 | CWS | Sells | 1,352 | Pinal County |
| Green Valley Mhp | AZ0413348 | CWS | Flagstaff | 190 | Yavapai County |
| Greenehaven Water Company | AZ0403037 | CWS | Tucson | 883 | Coconino County |
| Greenfield Ranchettes | AZ0407492 | CWS | Gilbert | 53 | Maricopa County |
| Greenfields Country Day School | AZ0420368 | NTNCWS | Tucson | 163 | Pima County |
| Gric Dpw Aerodyne | 090400691 | CWS | Sacaton | 35 | |
| Gric Dpw Casa Blanca_Bapchule | 090400092 | CWS | Sacaton | 2,603 | Pinal County |
| Gric Dpw Stotonic | 090400096 | CWS | Sacaton | 2,566 | Pinal County |
| Groom Creek Water Users | AZ0413040 | CWS | Prescott | 458 | Yavapai County |
| Gunsight (Schuchuligk) | 090400032 | CWS | Sells | 40 | |
| Gw -Bwc, Inc- Buckeye Ranch | AZ0407618 | CWS | Maricopa | 418 | Maricopa County |
| Gw -Bwc, Inc- Eagletail | AZ0407032 | CWS | Maricopa | 289 | Maricopa County |
| Gw -Bwc, Inc- Sunshine | AZ0407071 | CWS | Maricopa | 605 | Maricopa County |
| Gw -Bwc, Inc.- Nswc | AZ0407179 | CWS | Maricopa | 301 | Maricopa County |
| Gw -Bwc, Inc.- Wpe #6 | AZ0407733 | CWS | Maricopa | 70 | Maricopa County |
| Gw Farmers Water Co - Sahuarita | AZ0410048 | CWS | Maricopa | 396 | Pima County |
| Gw Farmers Water Co - Sahuarita Highland | AZ0410414 | CWS | Maricopa | 384 | Pima County |
| Gw Ocotillo Water - Silverbell West | AZ0410162 | CWS | Maricopa | 231 | Pima County |
| Gw Ocotillo Water - Thunderhead | AZ0410179 | CWS | Maricopa | 153 | Pima County |
| Gw Ocotillo Water - Catalina | AZ0410171 | CWS | Maricopa | 1,102 | Pima County |
| Gw Ocotillo Water - Diamond Bell | AZ0410159 | CWS | Maricopa | 649 | Pima County |
| Gw Ocotillo Water - Rancho Del Sol Lindo | AZ0410173 | CWS | Maricopa | 2,782 | Pima County |
| Gw Ocotillo Water - Sierrita Foothills | AZ0410270 | CWS | Maricopa | 79 | Pima County |
| Gw Ocotillo Water - Valley View Acres | AZ0410158 | CWS | Maricopa | 458 | Pima County |
| Gw Saguaro Dist Water Co - Amber Ann | AZ0410317 | CWS | Maricopa | 93 | Pima County |
| Gw Saguaro Dist Water Co - Lyn Lee | AZ0410007 | CWS | Maricopa | 106 | Pima County |
| Gw Saguaro Dist Water Co - Mirabell | AZ0410178 | CWS | Maricopa | 162 | Pima County |
| Gw Saguaro Dist Water Co - Rincon | AZ0410144 | CWS | Phoenix | 209 | Pima County |
| Gw Saguaro Dist Water Co - Tala Way | AZ0410283 | CWS | Maricopa | 221 | Pima County |
| Gw Saguaro Dist Water Co - Tortolita | AZ0410154 | CWS | Maricopa | 57 | Pima County |
| Gw Santa Cruz Water - Cp Water Co | AZ0411151 | CWS | Maricopa | 37 | Pinal County |
| Gw Santa Cruz Water - Maricopa Sw | AZ0411575 | CWS | Maricopa | 1,848 | Pinal County |
| Gw Santa Cruz Water -Twin Hawks Water | AZ0411460 | CWS | Maricopa | 64 | Pinal County |
| Gw Santa Cruz Water Co - Picacho Cove | AZ0411747 | NTNCWS | Maricopa | 35 | Pinal County |
| Gw Santa Cruz Water Co - Red Rock | AZ0411160 | CWS | Maricopa | 4,248 | Pinal County |
| Gw- Bwc, Inc- Dixie | AZ0407030 | CWS | Maricopa | 132 | Maricopa County |
| Gw- Bwc, Inc- Garden City | AZ0407037 | CWS | Maricopa | 60 | Maricopa County |
| Gw- Bwc, Inc- Roseview | AZ0407082 | CWS | Maricopa | 73 | Maricopa County |
| Hacienda Del Sol Mhp | AZ0407366 | CWS | Glendale | 300 | Maricopa County |
| Halcyon Acres 2 | AZ0410058 | CWS | Tucson | 144 | Pima County |
| Halcyon Acres Water Users Association | AZ0410057 | CWS | Tucson | 215 | Pima County |
| Hard Rock Ntua | NN0403811 | CWS | Ft Defiance | 982 | |
| Hardyville On The River | AZ0408342 | CWS | San Diego | 42 | Mohave County |
| Hatch Valley Dwid | AZ0408014 | CWS | Peach Springs | 150 | Mohave County |
| Havasu Heights Dwid | AZ0408026 | CWS | Lake Havasu City | 599 | Mohave County |
| Havasu Springs Resort | AZ0415008 | NTNCWS | Parker | 708 | La Paz County |
| Havasupai Village | 090400102 | CWS | Supai | 885 | |
| Hayden Town Of | AZ0404054 | CWS | Hayden | 517 | Gila County |
| Heber Dwid | AZ0409014 | CWS | Heber | 839 | Navajo County |
| Heber Dwid - Black Canyon Subdivision | AZ0409343 | CWS | Heber | 103 | Gila County, Navajo County |
| Heckethorn Water Company | AZ0403011 | CWS | Flagstaff | 90 | Coconino County |
| Hickmans Egg Ranch | AZ0407791 | NTNCWS | Greeley | 376 | Maricopa County |
| Hickmans Egg Ranch Tonopah | AZ0407547 | NTNCWS | Greeley | 235 | Maricopa County |
| Hickmans Family Farm | AZ0407792 | NTNCWS | Greeley | 30 | Maricopa County |
| Hidden Hollow Mhc | AZ0403362 | CWS | Huntington Beach | 400 | Coconino County |
| High Chaparral Water Coop | AZ0410282 | CWS | Tucson | 72 | Pima County |
| Highland Pine Dwid | AZ0413034 | CWS | Prescott | 450 | Yavapai County |
| Hillcrest Water Company | AZ0415026 | CWS | Tucson | 459 | La Paz County |
| Holbrook Sda Indian School | AZ0409046 | CWS | Holbrook | 100 | Navajo County |
| Holiday Hills Dwid | AZ0413035 | CWS | Kingman | 150 | Yavapai County |
| Hondah Casino | 090400086 | NTNCWS | Pinetop | 2,926 | |
| Hopeville Water System | AZ0407633 | CWS | Buckeye | 89 | Maricopa County |
| Hopi Cultural Center | 090400260 | NTNCWS | Kykotsmovi | 450 | |
| Hopi High School - Bia | 090400395 | CWS | Keams Canyon | 1,005 | |
| Hopi Veterans Center | 090400316 | CWS | Kykotsmovi | 388 | |
| Horizon Six Dwid | AZ0408122 | CWS | Kingman | 560 | Mohave County |
| Hotevilla Village | 090400700 | CWS | Hotevilla | 1,601 | Navajo County |
| Houck-Querino Canyon Ntua | NN0400280 | CWS | Ft Defiance | 971 | |
| Howard Cantonment Area | AZ0414403 | CWS | Yuma | 1,500 | Yuma County |
| Huc Regional Water System | 090400315 | CWS | Flagstaff | 0 | |
| Huc Side Rock Well Field | 090400056 | CWS | Flagstaff | 25 | |
| Humboldt Water System | AZ0413052 | CWS | Mayer | 830 | Yavapai County |
| Hunter Water - Town Of Duncan | AZ0406009 | CWS | Duncan | 125 | Greenlee County |
| Hunters Point Boarding School Bia | NN0436011 | CWS | Saint Michaels | 173 | |
| I40 Industrial Dwid Water System | AZ0408154 | NTNCWS | Kingman | 95 | Mohave County |
| Immaculate Conception Church | AZ0413250 | NTNCWS | Cottonwood | 800 | Yavapai County |
| Indian Hills Estates | AZ0411324 | CWS | Winkelman | 30 | Pinal County |
| Inscription Canyon Water Company | AZ0413263 | CWS | Prescott | 607 | Yavapai County |
| Inscription Canyon Water Company | AZ0413303 | CWS | Prescott | 532 | Yavapai County |
| Inscription House-Navajo Mountain Ntua | NN0400283 | CWS | Ft Defiance | 1,368 | |
| Jackrabbit | 090400231 | CWS | Sells | 40 | |
| Jackson Acres Dwid | AZ0413036 | CWS | Prescott | 30 | Yavapai County |
| Jacob Lake Lodge | AZ0403331 | CWS | Fredonia | 27 | Coconino County |
| Jakes Corner Rv Park | AZ0404101 | NTNCWS | Tucson | 30 | Gila County |
| Jakes Corner Water System | AZ0404029 | CWS | Payson | 35 | Gila County |
| Jbs Tolleson | AZ0407438 | NTNCWS | Tolleson | 1,700 | Maricopa County |
| Jeddito Ntua | NN0403100 | CWS | Ft Defiance | 1,105 | |
| Jerome Town Of | AZ0413037 | CWS | Jerome | 440 | Yavapai County |
| Jo Combs Elementary School | AZ0411045 | NTNCWS | San Tan Valley | 325 | Pinal County |
| Johnson Camp Mine Water | AZ0402409 | NTNCWS | Dragoon | 58 | Cochise County |
| Jones Coop Water Assoc | AZ0414070 | CWS | Yuma | 29 | Yuma County |
| Joseph City Dwid | AZ0409016 | CWS | Joseph City | 1,811 | Navajo County |
| Joshua Tree Water Company | AZ0408351 | NTNCWS | Dolan Spring | 45 | Mohave County |
| Joshua Valley Utility Company | AZ0408017 | CWS | San Francisco | 1,500 | Mohave County |
| Just For Fun Rv Park | AZ0415373 | CWS | Bouse | 212 | La Paz County |
| Kahlua Well Coop | AZ0410405 | CWS | Vail | 99 | Pima County |
| Kaibab Village | 090400274 | CWS | Pipe Spring | 407 | Mohave County |
| Kaibeto (Upper) Boarding School Bia | NN0433007 | CWS | Kaibeto | 400 | |
| Kaibeto Ntua | NN0400348 | CWS | Ft Defiance | 1,590 | |
| Kaka | 090400037 | CWS | Sells | 150 | Pinal County |
| Katherine Heights | AZ0408174 | CWS | Washington | 415 | Mohave County |
| Katherine Landing Dwtp | AZ0408701 | CWS | Boulder City | 1,300 | Mohave County |
| Kayenta Community Boarding School Bia | NN0433008 | CWS | Kayenta | 500 | |
| Kayenta Sandstone Housing | NN0400815 | CWS | Albuquerque | 1,375 | |
| Kearny Town Of | AZ0411031 | CWS | Kearny | 1,950 | Pinal County |
| Kelvin Simmons Coop | AZ0411035 | NTNCWS | San Tan Valley | 28 | Pinal County |
| Kempner Institute For Sustainable Living | AZ0413096 | NTNCWS | Mayer | 32 | Yavapai County |
| Kerwo Intertie | 090400041 | CWS | Sells | 441 | |
| Kingman Stopping Center | AZ0408077 | NTNCWS | Valparaiso | 650 | Mohave County |
| Kinlichee Community School Bia | NN0436015 | NTNCWS | Ganado | 174 | |
| Kinlichee Ntua | NN0400321 | CWS | Ft Defiance | 787 | |
| Kinlichee Staff Housing Bia | NN0436014 | CWS | Ganado | 80 | |
| Kino Ranch 2 | AZ0412015 | CWS | Rio Rico | 173 | Santa Cruz County |
| Kirkland School | AZ0413091 | NTNCWS | Kirkland | 89 | Yavapai County |
| Kitsillie-Black Mesa Ntua | NN0400253 | CWS | Ft Defiance | 414 | |
| Kitt Peak National Observatory | 090402057 | NTNCWS | Tucson | 247 | |
| Klafter Well Coop | AZ0410400 | CWS | Tucson | 45 | Pima County |
| Klagetoh Ntua | NN0403026 | CWS | Ft Defiance | 971 | |
| Kofa Cantonment Area | AZ0414367 | NTNCWS | Yuma | 390 | Yuma County |
| Kohatk | 090400016 | CWS | Sells | 80 | |
| Kohls Ranch Water Company | AZ0404013 | NTNCWS | Payson | 141 | Gila County |
| Krazy K Rv Park | AZ0413069 | CWS | Camp Verde | 380 | Yavapai County |
| Kykotsmovi | 090400105 | CWS | Kykotsmovi | 1,302 | Navajo County |
| La Casita Water Company 1 | AZ0410409 | CWS | Tucson | 171 | Pima County |
| La Casita Water Company 2 | AZ0410410 | CWS | Tucson | 264 | Pima County |
| La Casita Water Company 3 | AZ0420606 | CWS | Tucson | 598 | Pima County |
| La Cholla Airpark | AZ0420597 | CWS | Oro Valley | 250 | Pima County |
| La Costa Water Users Assoc | AZ0402041 | CWS | Douglas | 30 | Cochise County |
| Lagoon Estates Wc Unit 2 | AZ0408046 | CWS | Mohave Valley | 125 | Mohave County |
| Lagoon Estates Wc Unit 7 | AZ0408021 | CWS | Mohave Valley | 1,578 | Mohave County |
| Laguna Mobile Home And Rv Park | AZ0414322 | CWS | Rancho Cucamonga | 450 | Yuma County |
| Lake Juniper County Improvement District | AZ0408145 | CWS | Kingman | 63 | Mohave County |
| Lake Mary Country Store | AZ0403067 | CWS | Flagstaff | 130 | Coconino County |
| Lake Mead City Comm Coop 1 | AZ0408176 | NTNCWS | Meadview | 130 | Mohave County |
| Lake Mead City Community Coop 2 | AZ0408043 | NTNCWS | Meadview | 50 | Mohave County |
| Lake Mohave Highlands | AZ0408062 | CWS | Bullhead City | 746 | Mohave County |
| Lake Roosevelt Gardens East | AZ0404022 | CWS | Payson | 121 | Gila County |
| Lakeside Water Company | AZ0413026 | CWS | Prescott | 55 | Yavapai County |
| Lakewood Estates Water Company | AZ0410063 | CWS | Tucson | 905 | Pima County |
| Lamplighter Rv Resort | AZ0404324 | CWS | Chandler | 308 | Gila County |
| Lazy Acres Mhp | AZ0420176 | CWS | Tucson | 75 | Pima County |
| Lazy C Water Service | AZ0410065 | CWS | Tucson | 359 | Pima County |
| Lechee Ntua | NN0403006 | CWS | Ft Defiance | 1,115 | |
| Leupp Contract Boarding School Bia | NN0433009 | CWS | Winslow | 250 | |
| Leupp-Birdsprings-Tolani Lake Ntua | NN0403033 | CWS | Ft Defiance | 2,100 | |
| Lhoist N Am Of Az - Nelson Lime Plant | AZ0413345 | NTNCWS | Fort Worth | 90 | Yavapai County |
| Liberty Elementary School | AZ0407401 | NTNCWS | Buckeye | 775 | Maricopa County |
| Little Park Water Company | AZ0413075 | CWS | Sedona | 264 | Yavapai County |
| Little Tucson | 090400040 | CWS | Sells | 328 | Pima County |
| Littlefield Unified School District 9 | AZ0408148 | NTNCWS | Littlefield | 400 | Mohave County |
| Livco Water Company | AZ0401018 | CWS | Glendale | 1,120 | Apache County |
| Living Springs Mhp - Rainbow Trout Farm | AZ0403081 | CWS | Sedona | 100 | Coconino County |
| Lockett Estates | AZ0403175 | CWS | Flagstaff | 30 | Coconino County |
| Long House Valley Ntua | NN0400825 | CWS | Ft Defiance | 277 | |
| Lord Az Water 2 - Winchester Trails | AZ0401047 | CWS | Tucson | 1,289 | Apache County |
| Los Arboles Mobile Home Park | AZ0420175 | CWS | Tucson | 303 | Pima County |
| Lost Traveler Rv Park | AZ0414095 | CWS | Yuma | 200 | Yuma County |
| Loves Country Store Inc | AZ0415098 | NTNCWS | Oklahoma City | 475 | La Paz County |
| Loves Travel Stop #272 | AZ0408165 | NTNCWS | Oklahoma City | 476 | Mohave County |
| Loves Travel Stop No 722 | AZ0413486 | NTNCWS | Oklahoma City | 475 | Yavapai County |
| Low Mountain Boarding School Bia | NN0435006 | CWS | Pinon | 339 | |
| Lower Moencopi - Spring Source | 090400393 | CWS | Tuba City | 465 | |
| Lower Moencopi - Consecutive System | 090400058 | NTNCWS | Tuba City | 326 | |
| Lukachukai Community School New | NN0435012 | CWS | Lukachukai | 500 | |
| Lukachukai Ntua | NN0403047 | CWS | Ft Defiance | 1,659 | |
| Majestic View Water Improvement District | AZ0403044 | CWS | Kingman | 70 | Coconino County |
| Mammoth Town Of | AZ0411018 | CWS | Mammoth | 1,181 | Pinal County |
| Manneken Apartments | AZ0413264 | CWS | Prescott | 34 | Yavapai County |
| Many Farms Community School Bia | NN0435008 | CWS | Many Farms | 1,506 | |
| Marana Aerospace Solutions | AZ0411034 | NTNCWS | Marana | 400 | Pinal County |
| Marana Dwid - Culver | AZ0410070 | CWS | Marana | 709 | Pima County |
| Marana Dwid - Derringer | AZ0410139 | CWS | Marana | 1,950 | Pima County |
| Marana Estes Elementary School | AZ0420325 | NTNCWS | Marana | 2,000 | Pima County |
| Marana High School | AZ0420505 | NTNCWS | Marana | 2,450 | Pima County |
| Marana Municipal - Airline Lambert | AZ0410138 | CWS | Tucson | 4,948 | Pima County |
| Marana Municipal - Airport | AZ0410406 | NTNCWS | Tucson | 55 | Pima County |
| Marana Municipal - Palo Verde | AZ0410136 | CWS | Tucson | 128 | Pima County |
| Marana Municipal - Silverbell Gateway | AZ0410501 | CWS | Marana | 750 | Pima County |
| Marana Municipal - Tortolita Mountain | AZ0410505 | CWS | Marana | 200 | Pima County |
| Maricopa Agriculture Center | AZ0411354 | NTNCWS | Maricopa | 100 | Pinal County |
| Maricopa Consolidated Dwid | AZ0411036 | CWS | Maricopa | 928 | Pinal County |
| Maricopa Mountain Dwid 1 | AZ0411087 | CWS | Maricopa | 450 | Pinal County |
| Maricopa Mountain Dwid 2 | AZ0411322 | CWS | Maricopa | 120 | Pinal County |
| Mayer Dwid | AZ0413039 | CWS | Chino Valley | 1,400 | Yavapai County |
| Mcneal Elementary School | AZ0402083 | NTNCWS | Mcneal | 38 | Cochise County |
| Mcneal Water Company | AZ0402016 | CWS | Mcneal | 66 | Cochise County |
| Mesaland Water Company | AZ0410074 | CWS | Tucson | 294 | Pima County |
| Mescal Lakes Water System | AZ0402052 | CWS | Glendale | 1,398 | Cochise County |
| Mesquite Creek | 090400301 | CWS | Needles | 650 | Mohave County |
| Metropolitan Dwid - E&T System | AZ0410046 | CWS | Tucson | 880 | Pima County |
| Metropolitan Dwid - Lazy B | AZ0410218 | CWS | Tucson | 77 | Pima County |
| Michaels Ranch Water Users Association | AZ0413109 | CWS | Sedona | 54 | Yavapai County |
| Michigan Trailer Park | AZ0407621 | CWS | Phoenix | 400 | Maricopa County |
| Mingus Mountain Academy | AZ0413281 | CWS | Prescott Valley | 130 | Yavapai County |
| Mingus Union High School | AZ0413116 | NTNCWS | Cottonwood | 1,200 | Yavapai County |
| Mingus West Water System | AZ0413247 | CWS | Prescott Valley | 602 | Yavapai County |
| Mishongnovi (Upper Sipaulovi/Upper Mishongnovi) | 090400394 | CWS | Second Mesa | 490 | Navajo County |
| Mission View Mobile Home Park (Tucson Water Consec | 090400228 | CWS | Sells | 1,125 | Pima County |
| Misty Mountain Dwid | AZ0409075 | CWS | Lakeside | 44 | Navajo County |
| Mobile Elementary School District 86 | AZ0407048 | NTNCWS | Maricopa | 25 | Maricopa County |
| Mobile Gardens Dwid | AZ0407086 | CWS | Wittmann | 400 | Maricopa County |
| Mobile Home Properties | AZ0410319 | CWS | Tucson | 114 | Pima County |
| Moccasin Domestic Water Improvement District | 090408027 | CWS | Fredonia | 96 | Mohave County |
| Model Creek Elementary | AZ0413257 | NTNCWS | Peeples Valley | 68 | Yavapai County |
| Moenave Community | NN0403008 | CWS | Fort Defiance | 65 | |
| Mohawk Valley School District | AZ0414055 | NTNCWS | Roll | 171 | Yuma County |
| Monte Vista Water Company | AZ0402043 | CWS | Douglas | 150 | Cochise County |
| Montezuma Heights Water | AZ0413190 | CWS | Camp Verde | 60 | Yavapai County |
| Montezuma Rimrock Water Company | AZ0413071 | CWS | Rimrock | 439 | Yavapai County |
| Morenci Water Elec Co Clifton | AZ0406002 | CWS | Morenci | 1,680 | Greenlee County |
| Morristown Water Company | AZ0407111 | CWS | Morristown | 131 | Maricopa County |
| Mountain Dell Water Inc | AZ0403015 | CWS | Flagstaff | 250 | Coconino County |
| Mountain Gate Estates Mhp | AZ0404314 | CWS | Beverly Hills | 400 | Gila County |
| Mountain Glen Water Servic Linden Trails | AZ0409090 | CWS | Glendale | 975 | Navajo County |
| Mountain View Mhp | AZ0413419 | CWS | Scottsdale | 160 | Yavapai County |
| Mountain View Mobile Village | AZ0414432 | CWS | Yuma | 75 | Yuma County |
| Mountain View Rv Ranch | AZ0412306 | CWS | Amado | 100 | Santa Cruz County |
| Mountain Vu Rv Court | AZ0413393 | CWS | Cornville | 80 | Yavapai County |
| Mt Lemmon Dwid | AZ0410140 | CWS | Tucson | 290 | Pima County |
| Mt Tipton Water Company | AZ0408059 | CWS | Dolan Springs | 2,257 | Mohave County |
| Naco Estates | AZ0402345 | CWS | Sierra Vista | 75 | Cochise County |
| Naco Water Co Bisbee | AZ0402112 | CWS | Glendale | 138 | Cochise County |
| Naco Water Co Main | AZ0402024 | CWS | Glendale | 658 | Cochise County |
| Nadaburg School District | AZ0407678 | NTNCWS | Wittmann | 300 | Maricopa County |
| National Memorial Cemetery | AZ0407459 | NTNCWS | Phoenix | 202 | Maricopa County |
| Naturesweet Usa | AZ0405010 | NTNCWS | Willcox | 200 | Graham County |
| Navajo County Government Complex | AZ0409052 | NTNCWS | Holbrook | 540 | Navajo County |
| Navajo County Public Works Complex | AZ0409096 | NTNCWS | Holbrook | 86 | Navajo County |
| Navajo National Monument | NN0400339 | NTNCWS | Chinle | 25 | |
| Navajo Water - Chaparral Pines | AZ0409039 | CWS | Payson | 237 | Navajo County |
| Navajo Water - Laguna Estates | AZ0409000 | CWS | Phoenix | 89 | Navajo County |
| Navajo Water - Summer Pines | AZ0409030 | CWS | Payson | 580 | Navajo County |
| Nazlini Community Boarding School Bia | NN0435009 | CWS | Ganado | 230 | |
| Nazlini Ntua | NN0400397 | CWS | Ft Defiance | 862 | |
| New Fields | 090400019 | CWS | Sells | 67 | |
| New Lands Ntua | NN0403102 | CWS | Ft Defiance | 1,905 | |
| New River School | AZ0407683 | NTNCWS | Phoenix | 211 | Maricopa County |
| New Saddleback Vista | AZ0411557 | CWS | Maricopa | 100 | Pinal County |
| Newton Water Well | AZ0403061 | NTNCWS | Munds Park | 665 | Coconino County |
| Nissan Technical Center | AZ0411085 | NTNCWS | Stanfield | 200 | Pinal County |
| Nissan Technical Center Drivers Area | AZ0411185 | NTNCWS | Stanfield | 100 | Pinal County |
| North Bay Estates | AZ0404049 | CWS | Payson | 156 | Gila County |
| North La Cholla Mhp | AZ0420043 | CWS | Tucson | 150 | Pima County |
| Northern Section 4 Coop | AZ0411201 | CWS | Apache Junction | 48 | Pinal County |
| Northern Sunrise Wc Coronado | AZ0402013 | CWS | Sierra Vista | 553 | Cochise County |
| Northern Sunrise Wc Mustang Crystal | AZ0402054 | CWS | Sierra Vista | 315 | Cochise County |
| Northwest Regional Deer Valley Landfill | AZ0407535 | NTNCWS | Surpise | 40 | Maricopa County |
| Nps Temple Bar Wtp | AZ0408703 | NTNCWS | Boulder City | 305 | Mohave County |
| Ntm Aviation | AZ0402401 | CWS | Mcneal | 47 | Cochise County |
| Oak Creek Elementary School | AZ0413095 | NTNCWS | Cottonwood | 250 | Yavapai County |
| Oak Creek Utility Corp | AZ0403004 | CWS | Sedona | 72 | Coconino County |
| Oak Creek Valley | AZ0413121 | CWS | Clarkdale | 450 | Yavapai County |
| Oak Creek Water District | AZ0413041 | CWS | Sedona | 1,507 | Yavapai County |
| Oak Springs Ntua (South Of Hunters Point) | NN0403015 | CWS | Ft Defiance | 390 | |
| Oatman Water Company | AZ0408001 | CWS | Scottsdale | 230 | Mohave County |
| Ojo Bonito Estates Dwid | AZ0401039 | CWS | Vernon | 54 | Apache County |
| Olive Avenue Hoa | AZ0407484 | CWS | Sun City | 25 | Maricopa County |
| On The Greens | AZ0413268 | CWS | Cottonwood | 516 | Yavapai County |
| Orange Grove Elementary School | AZ0414105 | NTNCWS | Somerton | 425 | Yuma County |
| Orangewood Mobile Home Park | AZ0407682 | CWS | Phoenix | 500 | Maricopa County |
| Orchard Valley Mobile Home Park | AZ0420159 | CWS | Tucson | 130 | Pima County |
| Organ Pipe Nm Headquarters | AZ0410701 | CWS | Ajo | 755 | Pima County |
| Outlets North Phoenix | AZ0407189 | NTNCWS | Newport Beach | 1,000 | Maricopa County |
| Owens Elementary School | AZ0408052 | NTNCWS | Wikieup | 44 | Mohave County |
| Pai Domestic | AZ0407477 | NTNCWS | Scottsdale | 120 | Maricopa County |
| Painted Desert Demo Project Star School | AZ0403385 | CWS | Flagstaff | 250 | Coconino County |
| Palo Verde Nuclear Generating Station | AZ0407412 | NTNCWS | Tonopah | 3,000 | Maricopa County |
| Palo Verde School District 49 | AZ0407400 | NTNCWS | Palo Verde | 450 | Maricopa County |
| Paloma Ranch | AZ0407411 | CWS | Gila Bend | 112 | Maricopa County |
| Paloma School Dist 94 | AZ0407178 | NTNCWS | Gila Bend | 145 | Maricopa County |
| Palominas Elementary | AZ0402066 | NTNCWS | Hereford | 421 | Cochise County |
| Palominas Water Sewer Co | AZ0402026 | CWS | Tucson | 27 | Cochise County |
| Pantano Water Coop | AZ0410281 | CWS | Vail | 156 | Pima County |
| Papago Butte Dwid | AZ0411097 | CWS | Maricopa | 700 | Pinal County |
| Park Water Company Inc | AZ0411407 | CWS | Tucson | 427 | Pinal County |
| Parker Lakeview Estates | AZ0402045 | NTNCWS | Elgin | 54 | Cochise County |
| Parker South | AZ0415120 | NTNCWS | Parker | 45 | La Paz County |
| Parkside Community Church | AZ0413450 | NTNCWS | Camp Verde | 88 | Yavapai County |
| Patton Place Estates | AZ0407517 | CWS | Litchfield Park | 687 | Maricopa County |
| Payson Water - Deer Creek | AZ0404064 | CWS | Payson | 308 | Gila County |
| Payson Water - East Verde Estates | AZ0404026 | CWS | Payson | 375 | Gila County |
| Payson Water - Flowing Springs | AZ0404027 | CWS | Payson | 86 | Gila County |
| Payson Water - Meads Ranch | AZ0404015 | CWS | Payson | 172 | Gila County |
| Payson Water - Mesa De Caballo | AZ0404030 | CWS | Payson | 976 | Gila County |
| Payson Water - Whispering Pines | AZ0404039 | CWS | Payson | 403 | Gila County |
| Peabody Western Coal Company - Black Mesa Mines | NN0400287 | NTNCWS | Kayenta | 420 | |
| Peach Springs | 090400108 | CWS | Peach Springs | 1,865 | Mohave County |
| Peak View Ranch | AZ0407528 | CWS | Litchfield Park | 508 | Maricopa County |
| Pearce Elementary School | AZ0402073 | NTNCWS | Pearce | 100 | Cochise County |
| Peekaboo Water Coop | AZ0407671 | CWS | Chandler | 100 | Maricopa County |
| Petrified Forest Np | AZ0401704 | CWS | Petrified Forest | 1,742 | Apache County, Navajo County |
| Philadelphia Water System | AZ0413113 | CWS | Crown King | 42 | Yavapai County |
| Phoenix Cement Company | AZ0413386 | NTNCWS | Clarkdale | 150 | Yavapai County |
| Phoenix City Of Sr85 Landfill | AZ0407782 | NTNCWS | Buckeye | 100 | Maricopa County |
| Picacho Dwid | AZ0411042 | CWS | Pichacho | 285 | Pinal County |
| Picacho Elementary School District | AZ0411072 | NTNCWS | Picachho | 200 | Pinal County |
| Picacho Peak Rv Resort | AZ0411547 | CWS | Tempe | 400 | Pinal County |
| Picacho Peak Water Company | AZ0411038 | CWS | Tucson | 55 | Pinal County |
| Picacho Water Company | AZ0411135 | CWS | Phoenix | 2,440 | Pinal County |
| Pico Vista Community Well | AZ0410435 | CWS | Tucson | 49 | Pima County |
| Pinal County Justice Complex | AZ0411560 | CWS | Florence | 820 | Pinal County |
| Pine Creek Canyon Dwid | AZ0404044 | CWS | Pine | 140 | Gila County |
| Pine Springs Day School Bia | NN0436018 | CWS | Houck | 122 | |
| Pine Springs Ntua | NN0400813 | CWS | Ft Defiance | 222 | |
| Pine Valley Water Company | AZ0413103 | CWS | Sedona | 400 | Yavapai County |
| Pine Water Association Dwid | AZ0404016 | CWS | Pine | 100 | Gila County |
| Pinecrest Water Company | AZ0401010 | CWS | Nutrioso | 84 | Apache County |
| Pinedale Dwid | AZ0409041 | CWS | Pinedale | 376 | Navajo County |
| Pinedale Estates Dwid | AZ0409040 | CWS | Lakeside | 208 | Navajo County |
| Pinehurst Water Company | AZ0413043 | CWS | Prescott | 54 | Yavapai County |
| Pinetop Water Community Facilities Dist | AZ0409021 | CWS | Pinetop | 3,250 | Navajo County |
| Pinon Community Dormitory School Bia | NN0435010 | CWS | Pinon | 500 | |
| Pinto Valley Mine | AZ0404321 | NTNCWS | Miami | 699 | Gila County |
| Pinyon Plain Mine | AZ0403275 | NTNCWS | Lakewood | 35 | Coconino County |
| Pioneer Rv Resort | AZ0407624 | CWS | Phoenix | 583 | Maricopa County |
| Pisinemo Intertie | 090400030 | CWS | Sells | 472 | Pima County |
| Pita Water Company | AZ0420600 | CWS | Amado | 54 | Pima County |
| Pocketknife Water Coop | AZ0410008 | CWS | Vail | 70 | Pima County |
| Pomerene Dwid | AZ0402012 | CWS | Pomerene | 1,618 | Cochise County |
| Ponderosa Utility Corp | AZ0403018 | CWS | Flagstaff | 1,585 | Coconino County |
| Ponderosa Water, L.L.C | AZ0404020 | CWS | Strawberry | 117 | Gila County |
| Porter Creek Dwid | AZ0409013 | CWS | Lakeside | 250 | Navajo County |
| Porter Mountain Dwid | AZ0409024 | CWS | Lakeside | 322 | Navajo County |
| Q Mountain Vista Mhp | AZ0415509 | CWS | Quartzsite | 440 | La Paz County |
| Quail Ridge Dwid | AZ0413307 | CWS | Prescott | 179 | Yavapai County |
| Quail Run Water System | AZ0404341 | CWS | Roosevelt | 300 | Gila County |
| Quartzsite Town Of | AZ0415346 | CWS | Quartzsite | 2,761 | La Paz County |
| Queen Valley Dwid | AZ0411044 | CWS | Queen Valley | 1,200 | Pinal County |
| Queens Well | 090400005 | CWS | Sells | 64 | Pima County |
| Rainbow Acres | AZ0413340 | CWS | Camp Verde | 150 | Yavapai County |
| Raindance Water Coop | AZ0410278 | CWS | Tucson | 148 | Pima County |
| Ranch Plaza | AZ0413159 | NTNCWS | Chino Valley | 40 | Yavapai County |
| Ranch Water Service Inc | AZ0408082 | CWS | Kingman | 135 | Mohave County |
| Rancho Del Conejo Comm Water Coop | AZ0410142 | CWS | Tucson | 900 | Pima County |
| Rancho Sierrita Well Assoc | AZ0410286 | CWS | Tucson | 51 | Pima County |
| Rancho Tierra Blanca Poa | AZ0410272 | CWS | Marana | 126 | Pima County |
| Rancho Vida Rv Park | AZ0413330 | CWS | Prescott | 57 | Yavapai County |
| Rancho Wells Inc | AZ0407482 | CWS | Surprise | 59 | Maricopa County |
| Ranchwood Community | AZ0420205 | CWS | Phoenix | 225 | Pima County |
| Rare Metals Ntua | NN0400208 | CWS | Fort Defiance | 72 | |
| Red Mesa Public Schools | NN0400299 | CWS | Teec Nos Pos | 900 | |
| Red Rock (Red Valley) Day School Bia | NN0432007 | CWS | Red Valley | 55 | |
| Red Rock Acres Hoa | AZ0412321 | CWS | Patagonia | 23 | Santa Cruz County |
| Red Rock Crossing Mobile Village | AZ0413074 | CWS | Sedona | 50 | Yavapai County |
| Red Tail Hawk Health Center | 090400346 | NTNCWS | Sacaton | 635 | |
| Red Valley North Ntua | NN0403058 | CWS | Ft Defiance | 756 | |
| Reliance Jrc Goodyear | AZ0407303 | NTNCWS | Phoenix | 425 | Maricopa County |
| Remuda Ranch Del Sol At The Meadows | AZ0407192 | NTNCWS | Wickenburg | 80 | Maricopa County |
| Remuda Ranch Rio At The Meadows | AZ0407639 | NTNCWS | Wickenburg | 75 | Maricopa County |
| Resolution Copper Company | AZ0411078 | NTNCWS | Superior | 300 | Pinal County |
| Retaw Water Company | AZ0409017 | CWS | Lakeside | 54 | Navajo County |
| Retreat At Oak Creek Dwid | AZ0413298 | CWS | Sedona | 52 | Coconino County, Yavapai County |
| Rillito Water Users Assoc | AZ0410098 | CWS | Rillito | 165 | Pima County |
| Rim Country Estates Mhp | AZ0404400 | CWS | Scottsdale | 36 | Gila County |
| Rim Trail Dwid | AZ0404035 | CWS | Payson | 200 | Gila County |
| Rincon Country East Rv Park | AZ0420602 | CWS | Tucson | 912 | Pima County |
| Rincon Mesa Landowners | AZ0410199 | CWS | Vail | 75 | Pima County |
| Rio Mercado Water | AZ0410968 | CWS | Tucson | 266 | Pima County |
| Rio Verde Rv Park | AZ0413425 | CWS | Cottonwood | 90 | Yavapai County |
| Rio Viejo Water | AZ0410011 | CWS | Tucson | 272 | Pima County |
| Rio Vista Mobile Home Park | AZ0420487 | CWS | Tucson | 217 | Pima County |
| Rio Vista Ranches | AZ0408333 | CWS | Bullhead City | 59 | Mohave County |
| River City Rv Park | AZ0408071 | CWS | Bullhead City | 183 | Mohave County |
| River Rv Ranch | AZ0414086 | CWS | Rancho Santa Fe | 71 | Yuma County |
| Riverbound Custom Storage And Rv Park | AZ0408191 | NTNCWS | Lake Forest | 210 | Mohave County |
| Riverside Apartments | AZ0420129 | CWS | Tucson | 75 | Pima County |
| Road Runner Mhp | AZ0413338 | CWS | Chino Valley | 60 | Yavapai County |
| Rock Point Community School Bia | NN0435011 | CWS | Rock Point | 758 | |
| Rock Point Ntua | NN0403048 | CWS | Ft Defiance | 1,029 | |
| Rocky Ridge Boarding School Bia | NN0433015 | CWS | Kykotsmovi | 250 | |
| Roosevelt Ranch Rv & Mhp | AZ0404342 | CWS | Gilbert | 430 | Gila County |
| Roosevelt Resort Llc | AZ0404200 | CWS | Yuma | 139 | Gila County |
| Rose Acre Farms - Desert Valley Egg Farm | AZ0415135 | NTNCWS | Bouse | 130 | La Paz County |
| Rose Acre Farms Lone Cactus Egg Farm | AZ0415240 | NTNCWS | Bouse | 130 | La Paz County |
| Rosewood Ranch | AZ0413213 | NTNCWS | Wickenburg | 89 | Yavapai County |
| Rough Rock Community High School Bia | NN0435212 | NTNCWS | Chinle | 350 | |
| Rough Rock Demonstration School Bia | NN0435112 | CWS | Chinle | 200 | |
| Rough Rock Ntua | NN0400396 | CWS | Ft Defiance | 455 | |
| Round Rock Elementary School | NN0403024 | CWS | Teec Nos Pos | 396 | |
| Round Rock Ntua | NN0403023 | CWS | Ft Defiance | 876 | |
| Ruth Fisher School | AZ0407360 | NTNCWS | Tonopah | 1,800 | Maricopa County |
| Saddle Mountain Dairy | AZ0407720 | NTNCWS | Buckeye | 25 | Maricopa County |
| Sage Valley Mhp | AZ0403299 | CWS | Williams | 55 | Coconino County |
| Saguaro Acres Cfd | AZ0407670 | CWS | Surprise | 175 | Maricopa County |
| Saguaro Mobile Home Park | AZ0411381 | CWS | Kearny | 36 | Pinal County |
| Saguaro View Mgmt Company | AZ0407169 | CWS | Sun City | 400 | Maricopa County |
| Saguaro Water Company | AZ0410177 | CWS | Tucson | 3,243 | Pima County |
| Sahuarita Village Water Company | AZ0410123 | CWS | Sahuarita | 93 | Pima County |
| Saint Phillips Plaza | AZ0420612 | NTNCWS | Tucson | 220 | Pima County |
| Salome Water Company | AZ0415021 | CWS | Tucson | 289 | La Paz County |
| Salpointe Catholic High School | AZ0410214 | NTNCWS | Tucson | 1,300 | Pima County |
| Salt River Landfill | 090400694 | NTNCWS | Scottsdale | 38 | |
| Salt River Lehi | 090400706 | CWS | Scottsdale | 652 | Maricopa County |
| Salt River North Mesa | 090400695 | CWS | Scottsdale | 100 | Maricopa County |
| Samalayuca Improvement Assoc | AZ0410101 | CWS | Tucson | 150 | Pima County |
| San Carlos Apache Health Center | 090400740 | CWS | Peridot | 2,085 | |
| San Carlos High School | 090400701 | NTNCWS | San Carlos | 626 | |
| San Pedro | 090400036 | CWS | Sells | 135 | |
| San Simon Dwid | AZ0402027 | CWS | San Simon | 312 | Cochise County |
| San Tan Mountain Casino Temporary Water System | 090400048 | NTNCWS | Sacaton | 7,990 | |
| San Xavier Ord (East) | 090400227 | CWS | Sells | 390 | Pima County |
| San Xavier West | 090400035 | CWS | Sells | 1,511 | |
| Sandario Water Company | AZ0410093 | CWS | Glendale | 885 | Pima County |
| Sanders School District | AZ0401022 | CWS | Sanders | 350 | Apache County |
| Santa Rita Heights Mhp | AZ0420419 | CWS | Garden City | 50 | Pima County |
| Santa Rosa Ranch Intertie | 090400018 | CWS | Sells | 165 | Pima County |
| Sasabe Border Village | AZ0410047 | NTNCWS | Sasabe | 31 | Pima County |
| Sawmill Ntua | NN0403025 | CWS | Ft Defiance | 838 | |
| Scenic Valley Holding Company | AZ0408188 | NTNCWS | St. George | 47 | Mohave County |
| Scotts Miracle Gro | AZ0411565 | NTNCWS | Maricopa | 25 | Pinal County |
| Scua Beverly Hills | 090400699 | CWS | San Carlos | 612 | Gila County |
| Scua Bylas | 090400110 | CWS | San Carlos | 3,160 | Graham County |
| Scua Cutter | 090400239 | CWS | San Carlos | 574 | Gila County |
| Scua Lower Peridot | 090400112 | CWS | San Carlos | 702 | Gila County |
| Scua Lower Peridot Bush | 090400111 | CWS | San Carlos | 342 | |
| Scua Skill Center | 090400273 | CWS | San Carlos | 234 | |
| Scua Upper Peridot | 090400242 | CWS | San Carlos | 275 | |
| Seba Dalkai Boarding School Bia | NN0436019 | CWS | Winslow | 250 | |
| Second Mesa Day School - Bia | 090400057 | CWS | Second Mesa | 255 | Navajo County |
| Sedona Venture Water Company | AZ0413108 | CWS | Scottsdale | 480 | Yavapai County |
| Sentinel Elementary School | AZ0407335 | NTNCWS | Dateland | 70 | Maricopa County |
| Seven Canyons Of Sedona | AZ0413248 | CWS | Sedona | 195 | Yavapai County |
| Shady Spot Rv Park | AZ0415220 | CWS | Quartzsite | 44 | La Paz County |
| Shae Water Company | AZ0410268 | CWS | Amado | 54 | Pima County, Santa Cruz County |
| Shangri La Ranch | AZ0407660 | CWS | New River | 345 | Maricopa County |
| Shepard Water Company | AZ0414014 | CWS | Yuma | 430 | Yuma County |
| Sheraton Phoenix Downtown | AZ0407916 | NTNCWS | Phoenix | 1,804 | Maricopa County |
| Sherman Pines Water Company | AZ0413049 | CWS | Mayer | 110 | Yavapai County |
| Shiloh Water Company | AZ0410450 | CWS | Sahuarita | 309 | Pima County |
| Shonto Junction Ntua | NN0400326 | CWS | Ft Defiance | 1,146 | |
| Shonto Ntua | NN0400322 | CWS | Ft Defiance | 397 | |
| Shonto Preparatory Boarding School Bia | NN0433016 | CWS | Shonto | 664 | |
| Show Low Crossroads Hoa | AZ0401372 | CWS | Vernon | 38 | Apache County |
| Show Low Pines Well 3 | AZ0401076 | CWS | Show Low | 57 | Apache County |
| Shungopavi | 090400259 | CWS | Second Mesa | 1,430 | Navajo County |
| Sierra Court Mhc Llc | AZ0420092 | CWS | Tucson | 52 | Pima County |
| Sierra Pacific Mobile Manor | AZ0414098 | CWS | Yuma | 816 | Yuma County |
| Sierra Verde Ranch 2 | AZ0413283 | NTNCWS | Gilbert | 33 | Yavapai County |
| Sierra Vista Airport | AZ0402082 | NTNCWS | Sierra Vista | 50 | Cochise County |
| Sierra Vista Mh Village | AZ0402101 | CWS | Sierra Vista | 328 | Cochise County |
| Sierra Vista Rv Park | AZ0411383 | CWS | Casa Grande | 160 | Pinal County |
| Sierrita Mountain Water Coop | AZ0410208 | CWS | Tucson | 258 | Pima County |
| Siete Casas Joint Venture | AZ0410242 | CWS | Tucson | 25 | Pima County |
| Signal Peak Water Company | AZ0411079 | CWS | Tempe | 99 | Pinal County |
| Silver Bell Army Heliport | AZ0411703 | NTNCWS | Phoenix, | 500 | Pinal County |
| Silver Cholla Llc | AZ0420478 | CWS | Chandler | 168 | Pima County |
| Silver Creek Rv Park | AZ0408064 | CWS | Bullhead City | 280 | Mohave County |
| Silverbell Irrigation & Drainage Dist | AZ0411005 | CWS | Arizona City | 375 | Pinal County |
| Silverbell Mining, Llc | AZ0420006 | NTNCWS | Marana | 200 | Pima County |
| Silverview Rv Park | AZ0408164 | CWS | Bullhead City | 800 | Mohave County |
| Sipaulovi (Lower Sipaulovi/Lower Mishongnovi) | 090400107 | CWS | Second Mesa | 609 | Navajo County |
| Six Mile And Steamboat Village | 090400277 | CWS | Pipe Spring | 88 | Mohave County |
| Skull Valley School Dist 15 | AZ0413098 | NTNCWS | Skull Valley | 60 | Yavapai County |
| Sky Hi Dwid | AZ0409028 | CWS | Lakeside | 390 | Navajo County |
| Skyline Resort Rv Park | AZ0411556 | CWS | San Tan Valley | 375 | Pinal County |
| Snowbird Rv Park | AZ0408066 | CWS | Fort Mohave | 180 | Mohave County |
| So Hi Dwid | AZ0408041 | CWS | Golden Valley | 513 | Mohave County |
| Sofidel America Corp | AZ0407789 | NTNCWS | Horsham | 100 | Maricopa County |
| Softwinds Mobile Home Park | AZ0413122 | CWS | Mira Loma | 70 | Yavapai County |
| Solana Potable Water System | AZ0407794 | NTNCWS | Tempe | 120 | Maricopa County |
| Solitude Trails Dwid | AZ0404233 | CWS | Pine | 90 | Gila County |
| Sonoita Valley (North) Water Company | AZ0412308 | CWS | Tucson | 49 | Santa Cruz County |
| Sonoita Valley (South) Water Company | AZ0412005 | CWS | Laveen | 172 | Santa Cruz County |
| Sontel Water Coop | AZ0407900 | CWS | Higley | 80 | Maricopa County |
| Southern Sunrise Wc Cochise Horseshoe | AZ0402011 | CWS | Sierra Vista | 1,588 | Cochise County |
| Southern Sunrise Wc Miracle Valley | AZ0402023 | CWS | Sierra Vista | 620 | Cochise County |
| Southland Utilities - Golden Acres | AZ0402029 | CWS | Tucson | 1,635 | Cochise County |
| Southwestern Research Station | AZ0402357 | NTNCWS | Portal | 40 | Cochise County |
| Spanish Trail Water Company | AZ0410127 | CWS | Tucson | 3,822 | Pima County |
| Springerville Town Of | AZ0401013 | CWS | Springerville | 1,972 | Apache County |
| Srp Coronado Generating Station | AZ0401354 | NTNCWS | St Johns | 200 | Apache County |
| St David Dwid | AZ0402039 | CWS | Saint David | 2,192 | Cochise County |
| St Michael Indian School | NN0400380 | NTNCWS | St Michaels | 585 | Apache County |
| Star Charter School | AZ0403101 | NTNCWS | Flagstaff | 215 | Coconino County |
| Stratman Water Company | AZ0402075 | CWS | Saint David | 105 | Cochise County |
| Strawberry Hollow Dwid | AZ0404090 | NTNCWS | Pine | 40 | Gila County |
| Sturgeon Cromer Elem School | AZ0403069 | NTNCWS | Flagstaff | 750 | Coconino County |
| Sulger Water Company 2 | AZ0402120 | CWS | Sierra Vista | 67 | Cochise County |
| Summit Water Coop | AZ0420595 | CWS | Tucson | 53 | Pima County |
| Sun Leisure Estates Improvement District | AZ0414075 | CWS | Yuma | 143 | Yuma County |
| Sun Shiners Mhp | AZ0408080 | CWS | Beaver Dam | 136 | Mohave County |
| Sun Valley Farms Unit Vi | AZ0411111 | CWS | San Tan Valley | 600 | Pinal County |
| Sun Valley Utilities | AZ0409001 | CWS | Holbrook | 287 | Navajo County |
| Sunland Water Company | AZ0411334 | CWS | Glendale | 227 | Pinal County |
| Sunrise Base Lodge | 090400083 | NTNCWS | Whiteriver | 2,346 | |
| Sunrise Vista Utilities | AZ0408133 | CWS | Phoenix | 1,500 | Mohave County |
| Sunset Mobile Home Park | AZ0413373 | CWS | Sedona | 250 | Yavapai County |
| Superior Products Of Az | AZ0407902 | NTNCWS | Chandler | 85 | Maricopa County |
| Superstition Water Coop | AZ0410311 | CWS | Tucson | 45 | Pima County |
| Surprise, City Of Buena Vista | AZ0407538 | CWS | Surprise | 870 | Maricopa County |
| Sweet Springs Mobile Home Park | AZ0402327 | CWS | St. David | 85 | Cochise County |
| Sweetwater Ntua | NN0400399 | CWS | Ft Defiance | 2,014 | |
| Sweetwater Ranch - Town Of Taylor | AZ0409086 | CWS | Taylor | 180 | Navajo County |
| Tacna Water Improvement District | AZ0414515 | CWS | Yuma | 500 | Yuma County |
| Taliesin West | AZ0407072 | NTNCWS | Scottsdale | 67 | Maricopa County |
| Tall Pines Estates Water | AZ0403024 | CWS | Mormon Lake | 156 | Coconino County |
| Tanque Verde Guest Ranch | AZ0420472 | NTNCWS | Tucson | 150 | Pima County |
| Teec Nos Pos Community Boarding School Bia | NN0432010 | CWS | Teec Nos Pos | 300 | |
| Teec Nos Pos Ntua | NN0403055 | CWS | Ft Defiance | 752 | |
| Teen Challenge International | AZ0407675 | NTNCWS | Tucson | 62 | Maricopa County |
| The Grand Acres | AZ0412305 | CWS | Nogales | 153 | Santa Cruz County |
| The Meadows Of Wickenburg | AZ0407632 | NTNCWS | Wickenburg | 150 | Maricopa County |
| The Oaks Mobile Home Park | AZ0411062 | CWS | Bevery Hills | 180 | Maricopa County, Pinal County |
| The Pharm | AZ0402404 | NTNCWS | Willcox | 140 | Cochise County |
| Thim Utility Company | AZ0410117 | CWS | Tucson | 310 | Pima County |
| Thim Utility Company - Parkin | AZ0410250 | CWS | Tucson | 69 | Pima County |
| Thim Utility Company - Rancho Vista | AZ0410351 | CWS | Tucson | 105 | Pima County |
| Thim Utility Company - Well 9 | AZ0410206 | CWS | Tucson | 254 | Pima County |
| Thim Utility Company 2 | AZ0410228 | CWS | Tucson | 445 | Pima County |
| Thim Utility Corporation - Vfw | AZ0410207 | NTNCWS | Tucson | 413 | Pima County |
| Thim Water Company 2 | AZ0410264 | CWS | Tucson | 247 | Pima County |
| Thunderbird Farms Dwid | AZ0411100 | CWS | Maricopa | 2,315 | Pinal County |
| Tierra Linda Hoa Water Company | AZ0410411 | CWS | Tucson | 258 | Pima County |
| Timber Knoll Dwid | AZ0401015 | CWS | Phoenix | 153 | Apache County |
| Timberland Acres Dwid | AZ0409005 | CWS | Pinetop | 922 | Navajo County |
| Timberline Mhp | AZ0409300 | CWS | Orem | 350 | Navajo County |
| Tocc | 090400215 | CWS | Sells | 280 | |
| Tombstone City Of | AZ0402033 | CWS | Tombstone | 1,545 | Cochise County |
| Tonalea (Red Lake) Day School Bia | NN0433013 | CWS | Tonalea | 300 | |
| Tonalea-Red Lake Ntua | NN0400379 | CWS | Ft Defiance | 1,146 | |
| Tonto Apache | 090400343 | CWS | Payson | 2,580 | Gila County |
| Tonto Basin School District 33 | AZ0404055 | NTNCWS | Tonto Basin | 90 | Gila County |
| Tonto Basin Water - Cactus Forest | AZ0411052 | CWS | Tucson | 730 | Pinal County |
| Tonto Basin Water - Lr Gardens West | AZ0404047 | CWS | Payson | 1,172 | Gila County |
| Tonto Basin Water Roosevelt Lake Estates | AZ0404036 | CWS | Payson | 508 | Gila County |
| Tonto Creek Water Company | AZ0404021 | CWS | Phoenix | 190 | Gila County |
| Tonto Hills Dwid | AZ0407076 | CWS | Cave Creek | 350 | Maricopa County |
| Topawa Intertie | 090400001 | CWS | Sells | 1,318 | Pima County |
| Town & Country - Preston | AZ0412311 | CWS | Nogales | 430 | Santa Cruz County |
| Town & Country Estates | AZ0420109 | CWS | Tucson | 960 | Pima County |
| Town Of Camp Verde - Verde River Estates | AZ0413072 | CWS | Camp Verde | 150 | Yavapai County |
| Town Of Huachuca City | AZ0402019 | CWS | Tucson | 1,750 | Cochise County |
| Town Of Parker | 090415013 | CWS | Parker | 3,360 | La Paz County |
| Town Of Star Valley Water Department | AZ0404037 | CWS | Payson | 1,157 | Gila County |
| Town Of Taylor | AZ0409031 | CWS | Taylor | 4,190 | Navajo County |
| Toyota Proving Grounds/Tech Center | AZ0407200 | NTNCWS | Wittmann | 50 | Maricopa County |
| Trails West Mhp | AZ0410408 | CWS | Tucson | 500 | Pima County |
| Transwestern Pipeline Company - Klagetoh - 4 | NN0400291 | NTNCWS | Albuquerque | 25 | |
| Transwestern Pipeline Company - Leupp - 3 | NN0400293 | NTNCWS | Albuquerque | 25 | |
| Travel Centers Of America | AZ0407281 | NTNCWS | Tonopah | 1,600 | Maricopa County |
| Tri-City Prep High School | AZ0413261 | NTNCWS | Prescott | 300 | Yavapai County |
| Trillium Water System | AZ0407773 | CWS | Buckeye | 1,100 | Maricopa County |
| Triple G Dairy | AZ0407713 | CWS | Buckeye | 84 | Maricopa County |
| Trujillo Trail Dwid | AZ0412040 | CWS | Tubac | 78 | Santa Cruz County |
| Tsaile-Dine College Ntua | NN0403005 | CWS | Ft Defiance | 1,190 | |
| Tsehootsooi Middle School | NN0400181 | CWS | Fort Defiance | 875 | |
| Tuba City Boarding School Bia | NN0433001 | CWS | Tuba City | 2,040 | |
| Tucson Electric Power | AZ0401043 | NTNCWS | Springerville | 300 | Apache County |
| Tucson Medical Center | AZ0420213 | NTNCWS | Tucson | 3,000 | Pima County |
| Tucson Racquet & Fitness Club | AZ0410222 | NTNCWS | Tucson | 330 | Pima County |
| Tucson Ready Mix Orange Grove | AZ0420447 | NTNCWS | Phoenix | 80 | Pima County |
| Turquoise Triangle Rv Park | AZ0413391 | NTNCWS | Williams | 120 | Yavapai County |
| Twin Arrows Navajo Casino Internal | NN0400821 | NTNCWS | Fruitland | 25 | Coconino County |
| Twin Arrows Ntua | NN0400822 | NTNCWS | Ft Defiance | 25 | |
| Twin Buttes Rv, Llc | AZ0402360 | CWS | Douglas | 79 | Cochise County |
| Two Tanks Community Well | AZ0407524 | CWS | Surprise | 76 | Maricopa County |
| U-Haul International Inc. | AZ0407917 | NTNCWS | Tempe | 400 | Maricopa County |
| Under Canvas Grand Canyon | AZ0403107 | NTNCWS | Belgrade | 275 | Coconino County |
| Upper Moenkopi | 090400104 | CWS | Tuba City | 1,740 | Coconino County |
| Usaf Gila Bend | AZ0407055 | NTNCWS | Gila Bend | 150 | Maricopa County |
| Usdj Fbp Fed Corr Inst Safford | AZ0405306 | CWS | Safford | 949 | Graham County |
| Usfs Asnf Black Mesa Ranger District | AZ0409806 | NTNCWS | Overgaard | 87 | Navajo County |
| Usfs Knf Tusayan Admin | AZ0403659 | CWS | Flagstaff | 80 | Coconino County |
| Usmc Air Station - Cannon Complex | AZ0414083 | NTNCWS | Yuma | 100 | Yuma County |
| Utility Source Llc | AZ0403300 | CWS | Queen Creek | 1,710 | Coconino County |
| Vail School District - Elementary School | AZ0420336 | NTNCWS | Vail | 1,680 | Pima County |
| Valle Escondido | AZ0411409 | CWS | Maricopa | 405 | Pinal County |
| Valle Verde Del Norte | AZ0410152 | CWS | Tucson | 300 | Pima County |
| Valle Verde Water Company - East | AZ0412009 | CWS | Tucson | 2,397 | Santa Cruz County |
| Valle Verde Water Company - West | AZ0412025 | NTNCWS | Tucson | 74 | Santa Cruz County |
| Valley Union High School | AZ0402403 | NTNCWS | Elfrida | 100 | Cochise County |
| Valley View Elementary | AZ0402116 | NTNCWS | Hereford | 231 | Cochise County |
| Valley View Mhc & Rv Park | AZ0406305 | CWS | Duncan | 142 | Greenlee County |
| Valley View Water Company | AZ0407677 | CWS | Buckeye | 60 | Maricopa County |
| Vamori | 090400038 | CWS | Sells | 125 | |
| Ventana | 090400027 | CWS | Sells | 80 | Pinal County |
| Ventura Ranch Dwid | AZ0413485 | CWS | Scottsdale | 300 | Yavapai County |
| Verde Glen Dwid | AZ0404040 | CWS | Payson | 117 | Gila County |
| Verde Lakes Water - Big Valley | AZ0413130 | CWS | Camp Verde | 870 | Yavapai County |
| Verde Lakes Water - Dinky Creek | AZ0413059 | CWS | Camp Verde | 875 | Yavapai County |
| Verde Valley Manor | AZ0413127 | CWS | Cottonwood | 275 | Yavapai County |
| Vernon Dwid | AZ0401019 | CWS | Eagar | 100 | Apache County |
| Vernon Valley Water System | AZ0401054 | CWS | Tucson | 54 | Apache County |
| Via Verde West Mhp | AZ0420420 | CWS | Tucson | 156 | Pima County |
| Vicksburg Farm | AZ0415801 | CWS | Goodyear | 220 | La Paz County |
| Villa Grande Dwid | AZ0411321 | CWS | Eloy | 283 | Pinal County |
| Virgin Mountain Estates Mhp | AZ0408142 | CWS | Littlefield | 100 | Mohave County |
| Virgin Mountain Utilities Company | AZ0408173 | CWS | Littlefield | 200 | Mohave County |
| Vista Del Norte Mhp | AZ0420439 | CWS | Tucson | 554 | Pima County |
| Vorelco Test Facility | AZ0411106 | NTNCWS | Maricopa | 200 | Pinal County |
| Voyager At White Mountain Lakes Wc | AZ0409034 | CWS | Pinetop | 1,997 | Navajo County |
| Vwc Buckeye Div Bulfer Primrose | AZ0407114 | CWS | Buckeye | 280 | Maricopa County |
| Vwc Buckeye Division Sun Valley | AZ0407195 | CWS | Buckeye | 1,378 | Maricopa County |
| W Ranch Resort | AZ0404104 | CWS | Star Valley | 200 | Gila County |
| Walden Meadows Comm Coop | AZ0413184 | CWS | Walhoit | 880 | Yavapai County |
| Walker Cantonment Area | AZ0414363 | NTNCWS | Yuma | 888 | Yuma County |
| Walnut Creek Water Company | AZ0408078 | CWS | Glendale | 750 | Mohave County |
| Watco Water | AZ0409049 | CWS | Tucson | 1,039 | Navajo County |
| Wells Fargo Water Company | AZ0410269 | CWS | Tucson | 86 | Pima County |
| Wellton Town Of | AZ0414022 | CWS | Wellton | 3,000 | Yuma County |
| Wenden Dwid | AZ0415023 | CWS | Wenden | 360 | La Paz County |
| West End Water Company - Wheat | AZ0407167 | CWS | Peoria | 50 | Maricopa County |
| West End Water Company - Wittman | AZ0407067 | CWS | Peoria | 1,200 | Maricopa County |
| Westside Industrial Investments Llc | AZ0407525 | NTNCWS | Litchfield Park | 30 | Maricopa County |
| Wheatfields Ntua | NN0400812 | CWS | Ft Defiance | 321 | |
| Whetstone Dwid | AZ0402038 | CWS | Huachuca City | 940 | Cochise County |
| Whetstone Ranch Water System | AZ0402125 | CWS | Benson | 398 | Cochise County |
| Whetstone Village Mhp | AZ0402104 | CWS | Huachuca City | 50 | Cochise County |
| Whispering Wind Mobile Home Park | AZ0411365 | CWS | Coolidge | 200 | Pinal County |
| Whispering Winds Apartments | AZ0413487 | CWS | Peoria | 60 | Yavapai County |
| White Hills Trailer Park | AZ0413378 | CWS | Camp Verde | 150 | Yavapai County |
| White Horse Ranch Owners Association | AZ0413221 | CWS | Prescott | 292 | Yavapai County |
| White Mesa Ntua | NN0400209 | CWS | Fort Defiance | 496 | |
| White Mountain Summer Homes Dwid | AZ0409036 | CWS | Pinetop | 1,233 | Navajo County |
| White Mountain Water Company | AZ0409330 | CWS | Taylor | 475 | Navajo County |
| White Post Mission Ntua | NN0400286 | CWS | Ft Defiance | 185 | |
| White Tank Well Inc | AZ0407549 | CWS | Wittman | 87 | Maricopa County |
| Why Dwid | AZ0410118 | CWS | Ajo | 400 | Pima County |
| Wickenburg Ranch Estates | AZ0413358 | CWS | Wickenburg | 2,877 | Yavapai County |
| Wide Ruins Community Boarding School Bia | NN0436024 | CWS | Chambers | 215 | |
| Wildcat One Well Coop | AZ0410810 | CWS | Vail | 52 | Pima County |
| Wildflower Water Coop | AZ0410265 | CWS | Tucson | 157 | Pima County |
| Williams City Of | AZ0403026 | CWS | Williams | 3,145 | Coconino County |
| Willow Beach Nps | AZ0408704 | NTNCWS | Boulder City | 789 | Mohave County |
| Willow Lakes Property Owners Assoc | AZ0402042 | CWS | Benson | 190 | Cochise County |
| Wilmot Water Users Group | AZ0410402 | CWS | Tucson | 30 | Pima County |
| Windy Valley Plaza | AZ0413320 | NTNCWS | Chino Valley | 55 | Yavapai County |
| Winterhaven Water Development | AZ0410119 | CWS | Tucson | 685 | Pima County |
| Wmatua Carrizo | 090400244 | CWS | Whiteriver | 228 | Gila County |
| Wmatua Cibecue | 090400243 | CWS | Whiteriver | 2,590 | Navajo County |
| Wmatua Hondah-Mcnary | 090400076 | CWS | Whiteriver | 2,988 | Apache County, Navajo County |
| Wonderland Acres Dwid | AZ0409060 | CWS | Lakeside | 380 | Navajo County |
| Woodruff Domestic Water Company Inc | AZ0409050 | CWS | Woodruff | 140 | Navajo County |
| Word Of Life Assembly | AZ0413244 | NTNCWS | Chino Valley | 50 | Yavapai County |
| Worden Water Company | AZ0410132 | CWS | Twin Lake | 60 | Pima County |
| Yarnell Water Improvement Association | AZ0413057 | CWS | Prescott | 515 | Yavapai County |
| Yavapai Apache - Camp Verde | 090400118 | CWS | Camp Verde | 177 | |
| Yavapai Apache - Clarkdale | 090400119 | CWS | Camp Verde | 555 | Yavapai County |
| Yavapai Apache - Middle Verde | 090400116 | CWS | Camp Verde | 2,200 | Yavapai County |
| Yavapai Community College Agricultural | AZ0413251 | NTNCWS | Prescott Valley | 420 | Yavapai County |
| Yavapai Country Club Estates Water Co | AZ0413058 | CWS | Yarnell | 100 | Yavapai County |
| Yavapai Water Company | AZ0413010 | CWS | Glendale | 720 | Yavapai County |
| Yosemite Meats | AZ0409089 | NTNCWS | Taylor | 130 | Navajo County |
| Young Public School | AZ0404063 | NTNCWS | Young | 50 | Gila County |
| Yucca Water Association | AZ0408042 | CWS | Yucca | 250 | Mohave County |
| Yuma Desalting Project | AZ0414103 | NTNCWS | Yuma | 200 | Yuma County |
| Yuma Lakes Resort | AZ0414314 | NTNCWS | Parker | 652 | Yuma County |
| Yuma West Mhp | AZ0414391 | CWS | Marana | 30 | Yuma County |