1,017 community and non-transient non-community water systems are listed for Idaho in EPA SDWIS. 63 were sampled under UCMR 5; 9 of those had at least one PFAS result at or above the reporting level, and 4 had a highest single result at or above a 2024 EPA limit (PFOA or PFOS 4 ppt, or Hazard Index 1).
Idaho 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 (63)
| System | PWSID | City | Population | Highest PFOA (ppt) | Highest PFOS (ppt) | Highest HI | Highest single result |
|---|---|---|---|---|---|---|---|
| American Falls City Of | ID6390001 | American Falls | 4,863 | <MRL | <MRL | 0 | No PFAS detected |
| Ammon City Of | ID7100004 | Ammon | 17,338 | <MRL | <MRL | 0 | No PFAS detected |
| Avondale Irrigation Dist | ID1280008 | Hayden | 8,785 | <MRL | <MRL | 0 | No PFAS detected |
| Blackfoot City Of | ID6060007 | Blackfoot | 13,224 | <MRL | <MRL | 0 | No PFAS detected |
| Buhl City Of | ID5420007 | Buhl | 4,518 | <MRL | <MRL | 0 | No PFAS detected |
| Burley Water Dept | ID5160008 | Burley | 10,345 | <MRL | <MRL | 0 | No PFAS detected |
| Caldwell City Of | ID3140013 | Caldwell | 78,740 | <MRL | <MRL | 0 | No PFAS detected |
| Capitol Water Corp | ID4010022 | Boise | 9,000 | 5.9 | 9.8 | 5.61 | Hazard Index ≥ 3 × its limit |
| Central Shoshone County Water Dist | ID1400089 | Kellogg | 6,455 | <MRL | <MRL | 0 | No PFAS detected |
| Chubbuck City Of | ID6030008 | Chubbuck | 15,842 | <MRL | <MRL | 0 | No PFAS detected |
| Coeur D Alene City Of | ID1280053 | Coeur D Alene | 54,115 | <MRL | <MRL | 0 | Other PFAS detected |
| Cougar Bay Water Association | ID1280309 | Coeur D'Alene | 230 | <MRL | <MRL | 0 | No PFAS detected |
| Eagle, City Of (Eastern Zone) | ID4010201 | Eagle | 3,702 | <MRL | <MRL | 0 | No PFAS detected |
| Eagle, City Of (Western Zone) | ID4010222 | Eagle | 6,108 | <MRL | <MRL | 0 | No PFAS detected |
| East Greenacres Irrigation Dist | ID1280064 | Post Falls | 11,165 | <MRL | <MRL | 0 | No PFAS detected |
| Emmett City Of | ID3230012 | Emmett | 6,700 | <MRL | <MRL | 0 | No PFAS detected |
| Falls Water Company Inc | ID7100030 | Idaho Falls | 22,650 | <MRL | <MRL | 0 | No PFAS detected |
| Fort Hall | 101612109 | Fort Hall | 2,850 | <MRL | <MRL | 0 | No PFAS detected |
| Fruitland City Of | ID3380005 | Fruitland | 7,458 | <MRL | <MRL | 0 | No PFAS detected |
| Garden City Water And Sewer System | ID4010066 | Garden City | 12,500 | <MRL | 28.2 | 3.363 | PFOS ≥ 3 × its limit |
| Gooding City Of | ID5240009 | Gooding | 3,706 | <MRL | <MRL | 0 | No PFAS detected |
| Grangeville Water Dept | ID2250023 | Grangeville | 3,151 | <MRL | <MRL | 0 | No PFAS detected |
| Hailey Water And Sewer | ID5070022 | Hailey | 8,000 | <MRL | <MRL | 0 | No PFAS detected |
| Hayden Lake Irrigation Dist | ID1280087 | Hayden | 9,375 | <MRL | <MRL | 0 | No PFAS detected |
| Heyburn City Of | ID5340006 | Heyburn | 3,000 | <MRL | <MRL | 0 | No PFAS detected |
| Idaho Falls City Of | ID7100039 | Idaho Falls | 69,450 | <MRL | <MRL | 0 | No PFAS detected |
| Jerome City Of | ID5270011 | Jerome | 13,135 | <MRL | <MRL | 0 | No PFAS detected |
| Kaniksu Shores Estates | ID1090065 | Sandpoint | 93 | <MRL | <MRL | 0 | No PFAS detected |
| Ketchum City Of | ID5070028 | Ketchum | 3,555 | <MRL | <MRL | 0 | No PFAS detected |
| Kooskia Water Dept | ID2250032 | Kamiah | 514 | <MRL | <MRL | 0 | No PFAS detected |
| Kuna City Of | ID4010085 | Kuna | 32,038 | <MRL | <MRL | 0 | No PFAS detected |
| Lewiston City Of | ID2350014 | Lewiston | 15,001 | <MRL | <MRL | 0.003 | Hazard Index below its limit |
| Lewiston Orchards Irrigation Dist | ID2350015 | Lewiston | 20,000 | <MRL | <MRL | 0 | No PFAS detected |
| Mccall City Of | ID4430033 | Mccall | 4,423 | <MRL | <MRL | 0 | No PFAS detected |
| Meridian Water Dept | ID4010097 | Meridian | 152,070 | <MRL | 4.9 | 0.38 | PFOS 1–3 × its limit |
| Middleton City Of | ID3140074 | Middleton | 13,190 | <MRL | <MRL | 0 | No PFAS detected |
| Moreland Country Court | ID6060049 | Chubbuck | 60 | <MRL | <MRL | 0 | No PFAS detected |
| Moscow Water Dept | ID2290023 | Moscow | 26,000 | <MRL | <MRL | 0 | No PFAS detected |
| Mountain Home Air Force Base | ID4200054 | Mountain Home Afb | 7,500 | <MRL | <MRL | 1.002 | Hazard Index 1–3 × its limit |
| Mountain Home, City Of | ID4200032 | Mountain Home | 14,651 | <MRL | <MRL | 0 | No PFAS detected |
| Nampa City Of | ID3140080 | Nampa | 100,200 | <MRL | <MRL | 0 | No PFAS detected |
| Payette City Of | ID3380009 | Payette | 8,127 | <MRL | <MRL | 0 | Other PFAS detected |
| Pierce City Of | ID2180027 | Pierce | 467 | <MRL | <MRL | 0 | No PFAS detected |
| Pocatello Airport | 101600009 | Pocatello | 423 | <MRL | <MRL | 0 | No PFAS detected |
| Pocatello City Of | ID6030043 | Pocatello | 58,231 | <MRL | <MRL | 0 | No PFAS detected |
| Post Falls City Of | ID1280147 | Post Falls | 20,285 | <MRL | <MRL | 0 | No PFAS detected |
| Potlatch City Of | ID2290030 | Potlatch | 812 | <MRL | <MRL | 0 | No PFAS detected |
| Preston City Of | ID6210014 | Preston | 5,591 | <MRL | <MRL | 0 | No PFAS detected |
| Rathdrum City Of | ID1280152 | Rathdrum | 10,358 | <MRL | <MRL | 0 | Other PFAS detected |
| Rexburg City Of | ID7330022 | Rexburg | 40,695 | <MRL | <MRL | 0 | No PFAS detected |
| Rigby City Of | ID7260032 | Rigby | 5,400 | <MRL | <MRL | 0 | No PFAS detected |
| Ross Point Water Dist | ID1280163 | Post Falls | 10,473 | <MRL | <MRL | 0 | No PFAS detected |
| Rupert City Of | ID5340017 | Rupert | 5,796 | <MRL | <MRL | 0 | No PFAS detected |
| Sandpoint Public Works Dept | ID1090121 | Sandpoint | 12,284 | <MRL | <MRL | 0 | No PFAS detected |
| Shelley City Of | ID6060071 | Shelley | 4,409 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| St Anthony | ID7220067 | St Anthony | 3,606 | <MRL | <MRL | 0 | No PFAS detected |
| Star Sewer And Water Dist Water System | ID4010220 | Star | 14,000 | <MRL | <MRL | 0 | No PFAS detected |
| Sun Valley Water And Sewer Dist | ID5070051 | Sun Valley | 3,400 | <MRL | <MRL | 0 | No PFAS detected |
| Twin Falls City Of | ID5420058 | Twin Falls | 56,121 | <MRL | <MRL | 0 | No PFAS detected |
| University Of Idaho | ID2290042 | Moscow | 8,589 | <MRL | <MRL | 0 | No PFAS detected |
| Veolia Eagle | ID4010049 | Boise | 10,539 | <MRL | <MRL | 0 | No PFAS detected |
| Veolia Water Idaho | ID4010016 | Boise | 264,978 | <MRL | <MRL | 0 | No PFAS detected |
| Weiser City Of | ID3440011 | Weiser | 5,630 | <MRL | <MRL | 0 | No PFAS detected |
Not tested under UCMR 5 (954)
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 |
|---|---|---|---|---|---|
| 3D Water Association | ID7100201 | CWS | Uconn | 680 | Bonneville County |
| 729 Beef | ID5160089 | NTNCWS | Burley | 61 | Cassia County |
| A W Johnson Elementary School | ID6060017 | NTNCWS | Firth | 330 | Bingham County |
| Aberdeen City Of | ID6060001 | CWS | Aberdeen | 2,088 | Bingham County |
| Acequia School | ID5340037 | NTNCWS | Rupert | 300 | Minidoka County |
| Adm Edible Bean Specialities | ID3380028 | NTNCWS | New Plymouth | 28 | Payette County |
| Afc Finishing Systems | ID3440036 | NTNCWS | Notus | 25 | Washington County |
| Ahsahka Water And Sewer Dist | ID2180001 | CWS | Ahsahka | 85 | Clearwater County |
| Albeni Falls Bldg Supply Inc | ID1090225 | NTNCWS | Oldtown | 35 | Bonner County |
| Albion City Of | ID5160001 | CWS | Albion | 325 | Cassia County |
| Algoma Addition Subd | ID1090001 | CWS | Sandpoint | 68 | Bonner County |
| Alpine Meadows Water And Sewer Dist | ID1280002 | CWS | Hayden Lake | 265 | Kootenai County |
| Alzar School Inc | ID4430111 | NTNCWS | Cascade | 27 | Valley County |
| Amalgamated Sugar Paul | ID5340002 | NTNCWS | Paul | 200 | Minidoka County |
| Amalgamated Sugar Twin Falls | ID5420001 | NTNCWS | Paul | 460 | Twin Falls County |
| American Heritage Charter School | ID7100219 | NTNCWS | Idaho Falls | 490 | Bonneville County |
| Americold | ID5160087 | NTNCWS | Burley | 60 | Cassia County |
| Amy Trailer Park | ID4010068 | CWS | Boise | 46 | Ada County |
| Andco Management | ID7100194 | NTNCWS | Idaho Falls | 83 | Bonneville County |
| Andersen Manufacturing Inc | ID7100125 | NTNCWS | Idaho Falls | 50 | Bonneville County |
| Anderson Circle Water Corp | ID4010005 | CWS | Boise | 40 | Ada County |
| Antelope Creek Living Center | ID7190001 | CWS | Moore | 27 | Custer County |
| Apache Heights Subdivision (2) | ID3140005 | CWS | Nampa | 110 | Canyon County |
| Apex Living Community | ID2290024 | CWS | Moscow | 150 | Latah County |
| Appaloosa Community | ID2290036 | CWS | Port Orchard | 129 | Latah County |
| Appleton Produce Fresh Pack Plant | ID3440027 | NTNCWS | Weiser | 100 | Washington County |
| Arco City Of | ID6120001 | CWS | Arco | 1,080 | Butte County |
| Arimo City Of | ID6030002 | CWS | Arimo | 368 | Bannock County |
| Arrow Point Park | ID1280252 | CWS | Coeur D'Alene | 275 | Kootenai County |
| Arrowhead Ranch Water Company Llc | ID1090289 | CWS | Sandpoint | 30 | Bonner County |
| Arrowrock Ranch | ID4010247 | CWS | Meridian | 250 | Ada County |
| Ashley Estates Water Assn | ID1280273 | CWS | Rathdrum | 38 | Kootenai County |
| Ashton City Of | ID7220004 | CWS | Ashton | 1,129 | Fremont County |
| Aspen Creek Water Company | ID6040042 | CWS | Laketown | 64 | Bear Lake County |
| Aspen Hollow Homeowners Assoc | ID5070001 | CWS | Sun Valley | 75 | Blaine County |
| Aspen Ridge Subd | ID7220007 | CWS | Island Park | 204 | Fremont County |
| Athol City Of | ID1280006 | CWS | Athol | 990 | Kootenai County |
| Atlanta Water Assn | ID4200005 | CWS | Caldwell | 91 | Elmore County |
| Atlas Acres | ID1280005 | CWS | Rathdrum | 160 | Kootenai County |
| Atlas Sand And Rock Inc | ID2350044 | NTNCWS | Lewiston | 63 | Nez Perce County |
| Atomic Water Works | ID6060003 | CWS | Atomic City | 35 | Bingham County |
| Aurora Subd | ID3140007 | CWS | Notus | 30 | Canyon County |
| Autumn Cove Mobile Home Court | ID7100013 | CWS | Orem | 38 | Bonneville County |
| Avery Water And Sewer Dist | ID1400004 | CWS | Avery | 114 | Shoshone County |
| Bailey Creek Property Owners Assn | ID6150001 | CWS | Soda Springs | 250 | Bear Lake County, Caribou County |
| Baldy Ridge Estates | ID1090004 | CWS | Sandpoint | 50 | Bonner County |
| Ball Bros Produce | ID7260001 | NTNCWS | Lewisville | 35 | Jefferson County |
| Bancroft City Of | ID6150002 | CWS | Bancroft | 350 | Caribou County |
| Banida Water And Sewer Dist | ID6210001 | CWS | Preston | 180 | Franklin County |
| Basalt City Of | ID6060004 | CWS | Firth | 425 | Bingham County |
| Basf-Nunhems | ID3380031 | NTNCWS | Parma | 230 | Canyon County, Payette County |
| Basic American Potato, Inc. Packers | ID6060033 | NTNCWS | Blackfoot | 160 | Bingham County |
| Basic American Food Shelley | ID6060020 | NTNCWS | Blackfoot | 300 | Bingham County |
| Basic American Foods Blackfoot | ID6060002 | NTNCWS | Blackfoot | 500 | Bingham County |
| Basic American Foods Rexburg | ID7330023 | NTNCWS | Blackfoot | 150 | Madison County |
| Bayview Water And Sewer Dist | ID1280014 | CWS | Bayview | 1,320 | Kootenai County |
| Bear Claw Subd | ID1090231 | CWS | Spokane | 65 | Bonner County |
| Bear Island Water Assn | ID7260002 | CWS | Idaho Falls | 100 | Bonneville County, Jefferson County |
| Bear Lake West | ID6040005 | CWS | Garden City | 100 | Bear Lake County |
| Bear Lake West Poa | ID6040044 | CWS | Fish Haven | 300 | Bear Lake County |
| Bee Line Water Assn Inc | ID1110001 | CWS | Bonners Ferry | 533 | Boundary County |
| Belle Aire Acres 2 | ID3140009 | CWS | Nampa | 350 | Canyon County |
| Bellevue City Of | ID5070004 | CWS | Bellevue | 2,747 | Blaine County |
| Bennett Lumber Products Inc | ID2290003 | NTNCWS | Princeton | 150 | Latah County |
| Bennington Water System | ID6040006 | CWS | Bennington | 250 | Bear Lake County |
| Beranna | ID3140268 | NTNCWS | Twin Falls | 35 | Canyon County |
| Berry Patch Water Acres Assn | ID1090109 | CWS | Athol | 45 | Bonner County |
| Bettencourt #1 | ID5240046 | NTNCWS | Wendell | 25 | Gooding County |
| Bia North Idaho | 101612108 | CWS | Lapwai | 490 | Nez Perce County |
| Big Sky N. Subdivision | 101600010 | CWS | Pocatello | 300 | Power County |
| Birch Creek Culinary | ID6210009 | CWS | Preston | 120 | Franklin County |
| Bittercreek Meadows Subdivision | ID4010200 | CWS | Meridian | 75 | Ada County |
| Black Rock Utilities Inc | ID1280290 | CWS | Hayden | 1,014 | Kootenai County |
| Blackhawk Estates/Iron Rim | ID7100207 | CWS | Daho Falls | 270 | Bonneville County |
| Blackhawk On The River | ID4430105 | CWS | Boise | 150 | Valley County |
| Blanchard Coop Water Assn | ID1090008 | CWS | Blanchard | 180 | Bonner County |
| Bliss City Of | ID5240002 | CWS | Bliss | 384 | Gooding County |
| Bloomington City Of | ID6040007 | CWS | Bloomington | 206 | Bear Lake County |
| Blue Sage Subdivision | ID4200108 | CWS | Mountain Home | 112 | Elmore County |
| Bme Fire Trucks | ID4010223 | NTNCWS | Nampa | 74 | Ada County |
| Boer | ID5240047 | NTNCWS | Jerome | 25 | Gooding County |
| Bogus Basin Mtn Resort | ID4080003 | NTNCWS | Boise | 750 | Boise County |
| Boise Cascade Homedale Beams | ID3370041 | NTNCWS | Notus | 100 | Owyhee County |
| Boise Holcomb Water Users Assoc. Inc | ID4080004 | CWS | Boise | 36 | Boise County |
| Boise Stage Stop | ID4010003 | NTNCWS | Boise | 100 | Ada County |
| Bonners Ferry City Of | ID1110003 | CWS | Bonners Ferry | 3,367 | Boundary County |
| Bonneville Acres Water Users Assn Inc | ID7100059 | CWS | Idaho Falls | 100 | Bonneville County |
| Bonneville High School | ID7100010 | NTNCWS | Idaho Falls | 1,354 | Bonneville County |
| Bonnie Laura Subd | ID3230004 | CWS | Emmett | 60 | Gem County |
| Bovill Water Dept | ID2290005 | CWS | Bovill | 256 | Latah County |
| Broadway Apartments | ID7100047 | CWS | Shelley | 72 | Bonneville County |
| Brookhaven Water Assn | ID7100012 | CWS | Idaho Falls | 33 | Bonneville County |
| Bruneau Water And Sewer Dist | ID3370007 | CWS | Bruneau | 220 | Owyhee County |
| Burnie Subd | ID3140011 | CWS | Nampa | 55 | Canyon County |
| Butte City Of | ID6120002 | CWS | Arco | 59 | Butte County |
| Cabinet Mountains Water Dist | ID1110042 | CWS | Bonners Ferry | 2,335 | Boundary County |
| Calder Water And Sewer District | ID1400010 | CWS | Calder | 80 | Shoshone County |
| Caldwell Housing Authority | ID3140012 | CWS | Caldwell | 1,100 | Canyon County |
| Calvary Chapel Of Emmett | ID3230005 | NTNCWS | Emmett | 192 | Gem County |
| Camas Estates Water Users | ID4200009 | CWS | Mountain Home | 50 | Elmore County |
| Cambridge City Of | ID3440002 | CWS | Cambridge | 335 | Washington County |
| Camelot Water Assn Inc | ID3140014 | CWS | Nampa | 157 | Canyon County |
| Canyon County Solid Waste | ID3140237 | NTNCWS | Nampa | 30 | Canyon County |
| Canyon Creek Mobile Home Park | ID4200010 | CWS | Boise | 243 | Elmore County |
| Canyon Estates Water System | ID6040045 | CWS | Bountiful | 50 | Bear Lake County |
| Canyon School Dist 391 | ID1280035 | NTNCWS | Kellogg | 95 | Kootenai County |
| Carey City Of | ID5070010 | CWS | Carey | 993 | Blaine County |
| Caribou Acres | ID6030005 | CWS | Pocatello | 150 | Bannock County |
| Carlin Bay Property Owners Association | ID1280039 | CWS | Coeur D'Alene | 220 | Kootenai County |
| Cascade City Of | ID4430012 | CWS | Cascade | 1,000 | Valley County |
| Cassandra Hills Owners Assn | ID1050004 | CWS | St Maries | 57 | Benewah County |
| Castle Mountain Creeks Owners Assn | ID4080007 | CWS | Garden Valley | 250 | Boise County |
| Castleford City Of | ID5420010 | CWS | Castleford | 275 | Twin Falls County |
| Cataldo Water Dist | ID1400012 | CWS | Kingston | 680 | Kootenai County, Shoshone County |
| Cave Bay Community System | ID1280041 | CWS | Worley | 458 | Kootenai County |
| Cavendish School | ID2180006 | NTNCWS | Orofino | 26 | Clearwater County, Nez Perce County |
| Cedar Butte Subdivision | ID7330067 | CWS | Rexburg | 300 | Madison County |
| Cedar Point Subdivision | ID6060119 | CWS | Shelley | 63 | Bingham County |
| Cedar Springs Community Water | ID1090101 | CWS | Sagle | 130 | Bonner County |
| Chalet Mobile Home Park | ID5070012 | CWS | San Diego | 60 | Blaine County |
| Challenger Pallet And Supply Inc | ID7260082 | NTNCWS | Idaho Falls | 60 | Bonneville County, Jefferson County |
| Challis City Of | ID7190013 | CWS | Challis | 900 | Custer County |
| Champion Home Builders | ID3440024 | NTNCWS | Weiser | 200 | Washington County |
| Champion Produce | ID3140204 | NTNCWS | Parma | 55 | Canyon County |
| Chaparral Water Assn | ID4010025 | CWS | Eagle | 100 | Ada County |
| Chateaux Water Assn Inc | ID1280046 | CWS | Hayden | 275 | Kootenai County |
| Cherry Ridge Rehab | ID3230030 | CWS | Emmett | 50 | Gem County |
| Chilco Service Area | ID1280048 | CWS | Rathdrum | 563 | Kootenai County |
| Chobani | ID5420110 | NTNCWS | Twin Falls | 390 | Twin Falls County |
| Christinas Daycare | ID5270036 | NTNCWS | Jerome | 32 | Jerome County |
| Christis Mobile Park | ID3140142 | CWS | Boise | 50 | Canyon County |
| City Of Eagle - Avimor | ID4010272 | CWS | Eagle | 490 | Ada County |
| City Of Eagle - Valnova | ID4010271 | CWS | Eagle | 490 | Ada County |
| Clark Fork City Of | ID1090018 | CWS | Clark Fork | 730 | Bonner County |
| Clark Theurer Water Assn | ID3140140 | CWS | Nampa | 155 | Canyon County |
| Clarkia Water And Sewer Dist | ID1400021 | CWS | Clarkia | 53 | Shoshone County |
| Clear Lake Ranch P U D | ID5240033 | CWS | Buhl | 54 | Gooding County |
| Clearwater Paper Corporation | ID2350024 | NTNCWS | Lewiston | 1,550 | Nez Perce County |
| Clearwater River Casino & Resort | 101600016 | NTNCWS | Lewiston | 650 | |
| Clearwater Water Dist | ID2250011 | CWS | Clearwater | 80 | Idaho County |
| Clifton City Of | ID6210002 | CWS | Clifton | 413 | Franklin County |
| Clover Trinity Lutheran School | ID5420013 | NTNCWS | Buhl | 50 | Twin Falls County |
| Cloverdale Montessori School | ID4010177 | NTNCWS | Boise | 50 | Ada County |
| Coeur D'Alene Casino | 101600015 | NTNCWS | Worley | 3,250 | |
| Coeur D'Alene Sub-Agency | 101600002 | CWS | Plummer | 50 | Benewah County |
| Colburn Water Assn | ID1090021 | CWS | Sandpoint | 290 | Bonner County |
| Cold Springs Subd | ID5070015 | CWS | Ketchum | 300 | Blaine County |
| Comeback Bay Water Assn | ID1090022 | CWS | Sagle | 30 | Bonner County |
| Comore Loma | ID7100020 | CWS | Idaho Falls | 1,626 | Bonneville County |
| Cone Delfred Subd | ID2290020 | CWS | Princeton | 40 | Latah County |
| Conkling Park Water Assn | ID1280054 | CWS | Worley | 309 | Kootenai County |
| Cottonwood Acres 3 & 5 | ID7100192 | CWS | Rigby | 60 | Bonneville County |
| Cottonwood Acres Div 4 | ID7100022 | CWS | Idaho Falls | 43 | Bonneville County |
| Cottonwood Point Water Assn | ID1050008 | CWS | St Maries | 158 | Benewah County |
| Cottonwood Water Dept | ID2250013 | CWS | Cottonwood | 977 | Idaho County |
| Cougar Creek Water Assn | ID1090030 | CWS | Coolin | 270 | Bonner County |
| Cougar Ridge Water & Sewer | ID2350036 | CWS | Lewiston | 173 | Nez Perce County |
| Council City Of | ID3020002 | CWS | Council | 900 | Adams County |
| Country Club Estates | ID5270004 | CWS | Jerome | 137 | Jerome County |
| Country Club Subdivisions Water Assn | ID3140022 | CWS | Caldwell | 120 | Canyon County |
| Country Court Community | ID2250014 | CWS | Grangeville | 89 | Idaho County |
| Country Haven Utilities | ID6060013 | CWS | Blackfoot | 150 | Bingham County |
| Country Homes Mobile Park | ID2290007 | CWS | Seattle | 90 | Latah County |
| Country Life Estates | ID7100024 | CWS | Idaho Falls | 250 | Bonneville County |
| Country Living Center | ID7260047 | CWS | Rigby | 30 | Jefferson County |
| Country Meadows Subd | ID3140200 | CWS | Nampa | 35 | Canyon County |
| Country Squire Estates | ID7260007 | CWS | Rigby | 450 | Jefferson County |
| Countryside Village | ID5420014 | CWS | Orange | 108 | Twin Falls County |
| Covert Water Users Association | ID3140024 | CWS | Nampa | 250 | Canyon County |
| Cow Creek Water Assn | ID1110007 | CWS | Bonners Ferry | 28 | Boundary County |
| Craigmont City Of | ID2310001 | CWS | Craigmont | 501 | Lewis County |
| Cross-Roads Subdivision | ID7100218 | NTNCWS | North Logan | 117 | Bonneville County |
| Crossroads Of Idaho | ID5270022 | NTNCWS | Jerome | 300 | Jerome County |
| Cs Beef Packing | ID4010265 | NTNCWS | Kuna | 850 | Ada County |
| Cti Food Service | ID3140161 | NTNCWS | Wilder | 216 | Canyon County |
| Cub River Acres | ID6210003 | CWS | Preston | 180 | Franklin County |
| Culdesac City Of | ID2350003 | CWS | Culdesac | 382 | Nez Perce County |
| Curley Creek Water Assn | ID1110008 | CWS | Moyie Springs | 50 | Boundary County |
| D And M Water Assn | ID6030010 | CWS | Pocatello | 142 | Bannock County |
| D And S Purple Sage Ranchettes | ID3140092 | CWS | Notus | 70 | Canyon County |
| D&A Warehousing Llc | ID7100187 | NTNCWS | Sacramento | 140 | Bonneville County |
| Dahl Subd | ID3140025 | CWS | Nampa | 51 | Canyon County |
| Dalton Water Assn Inc | ID1280059 | CWS | Dalton Gardens | 2,602 | Kootenai County |
| Danskin Properties Association Inc | ID4200091 | CWS | Boise | 52 | Elmore County |
| Dar Pro Solutions | ID4010259 | NTNCWS | Kuna | 50 | Ada County |
| Darby Water Assn | ID7410003 | CWS | Driggs | 58 | Teton County |
| Day Star | ID4430001 | CWS | Donnelly | 250 | Valley County |
| Dayton City Of | ID6210004 | CWS | Dayton | 510 | Franklin County |
| Deary City Of | ID2290008 | CWS | Deary | 529 | Latah County |
| Decker Addition | ID3380004 | CWS | Payette | 55 | Payette County |
| Declo City Of | ID5160012 | CWS | Declo | 350 | Cassia County |
| Decoy Inn And Rv Park | ID3140026 | CWS | Notus | 75 | Canyon County |
| Deep Creek Mennonite School | ID5420041 | NTNCWS | Buhl | 75 | Twin Falls County |
| Deep Creek Water Company | ID1110011 | CWS | Sandpoint | 30 | Boundary County |
| Degroot | ID3140269 | NTNCWS | Twin Falls | 30 | Canyon County |
| Del Rio Estates | ID5160014 | CWS | Burley | 60 | Cassia County |
| Dell Subd Water Assn | ID4010039 | CWS | Eagle | 30 | Ada County |
| Deruyters Housing | ID3370044 | NTNCWS | Marsing | 36 | Owyhee County |
| Desert View Christian School | ID3370040 | NTNCWS | Grand View | 50 | Owyhee County |
| Desert View Estates Water Corp | ID4010042 | CWS | Kuna | 650 | Ada County |
| Desmet | 101600001 | CWS | Plummer | 355 | Benewah County |
| Diamond Benchview Water Corp | ID1090033 | CWS | Sandpoint | 115 | Bonner County |
| Dickinson Frozen Foods | ID7330061 | NTNCWS | Downey | 190 | Madison County |
| Dietrich Water System | ID5320008 | CWS | Dietrich | 450 | Lincoln County |
| Dj Park Well | ID7100200 | CWS | Idaho Falls | 35 | Bonneville County |
| Donnelly City Of | ID4430019 | CWS | Donnelly | 237 | Valley County |
| Dover City Of | ID1090193 | CWS | Dover | 865 | Bonner County |
| Downey City Of | ID6030012 | CWS | Downey | 586 | Bannock County |
| Drake Subd | ID3140028 | CWS | Caldwell | 150 | Canyon County |
| Driggs City Of | ID7410004 | CWS | Driggs | 2,200 | Teton County |
| Dry Acres Water And Sewer Dist | ID1280062 | CWS | Rathdrum | 75 | Kootenai County |
| Dry Creek Water Company Llc | ID4010266 | CWS | Eagle | 1,658 | Ada County |
| Dubois City Of | ID7170003 | CWS | Dubois | 511 | Clark County |
| Dufort Water Association | ID1090268 | CWS | Spokane | 216 | Bonner County |
| Duquette Pines Homeowners Association | ID4080016 | CWS | Meridian | 163 | Boise County |
| E Shoshone County Water Dist Burke | ID1400016 | CWS | Wallace | 45 | Shoshone County |
| E Shoshone County Water Dist Mullan | ID1400017 | CWS | Wallace | 840 | Shoshone County |
| E Shoshone County Water Dist Wallace | ID1400019 | CWS | Wallace | 2,388 | Shoshone County |
| Eagle Farms | ID7100038 | NTNCWS | Iona | 130 | Bonneville County |
| Eagle Glen Homeowners Assn Inc | ID4010047 | CWS | Boise | 300 | Ada County |
| Eagle Meadows Mhp | ID4010048 | CWS | Eagle | 195 | Ada County |
| Eagle Mhc | ID4010123 | CWS | Boise | 135 | Ada County |
| Eagle Point Community | ID4010101 | CWS | Eagle | 150 | Ada County |
| Eagle West Subd Water Assn | ID4010050 | CWS | Eagle | 92 | Ada County |
| Eagles Pointe Subdivision | ID2350038 | CWS | Lewiston | 154 | Nez Perce County |
| East Hope Water Dept | ID1090038 | CWS | Hope | 445 | Bonner County |
| East Lizard Butte Water Corp | ID3140042 | CWS | Caldwell | 95 | Canyon County |
| East Seasons Acres | ID1280278 | CWS | Rathdrum | 63 | Kootenai County |
| Eaton Mobile Home Court | ID2350008 | CWS | Lewiston | 94 | Nez Perce County |
| Edelweiss Village First Addition | ID1090174 | CWS | Ponderay | 70 | Bonner County |
| Eden City Of | ID5270006 | CWS | Eden | 411 | Jerome County |
| Edgemere Iii | ID1090253 | CWS | Spirit Lake | 60 | Bonner County |
| Edgemont Subd | ID3230010 | CWS | Emmett | 40 | Gem County |
| Ee Dah How Acres Subd | ID7410019 | CWS | Driggs | 69 | Teton County |
| Eight Mile Prairie | ID1280254 | CWS | Athol | 68 | Kootenai County |
| El Rancho Heights | ID3140034 | CWS | Caldwell | 300 | Canyon County |
| Elk Bend Unit 1 | ID7300013 | CWS | Salmon | 200 | Lemhi County |
| Elk City Water And Sewer Assn | ID2250017 | CWS | Elk City | 320 | Idaho County |
| Elk Creek Church | ID4430114 | NTNCWS | Mccall | 25 | Valley County |
| Elk Meadows | ID7260070 | CWS | Rigby | 100 | Jefferson County |
| Elk Mountain Farms Backwoods | ID1110040 | NTNCWS | Bonners Ferry | 200 | Boundary County |
| Elk Mountain Farms Tavern Farm | ID1110041 | NTNCWS | Bonners Ferry | 25 | Boundary County |
| Elk River City Of | ID2180013 | CWS | Elk River | 165 | Clearwater County |
| Elkhorn Ranch | ID1280293 | CWS | Rathdrum | 278 | Kootenai County |
| Emerald Estates Water Assn Inc | ID1280066 | CWS | Coeur D Alene | 495 | Kootenai County |
| Emida Water And Sewer Association | ID1050009 | CWS | St Maries | 120 | Benewah County |
| Emmett Head Start | ID3230075 | NTNCWS | Payette | 55 | Gem County |
| Encoder Products Company Westmond | ID1090197 | NTNCWS | Sandpoint | 170 | Bonner County |
| Equestrian Estates | ID6030073 | CWS | Pocatello | 88 | Bannock County |
| Evans Water Corp | ID4010055 | CWS | Eagle | 137 | Ada County |
| Evergreen Acres Subd | ID6030015 | CWS | Inkom | 25 | Bannock County |
| Evergreen Community Llc | ID2290013 | CWS | Port Orchard | 65 | Latah County |
| Evergreen Heights Subd | ID6150008 | CWS | Soda Springs | 25 | Caribou County |
| Evergreen Mobile Park | ID3140035 | CWS | Nampa | 284 | Canyon County |
| Evergreen Terrace Water Association | ID1050010 | CWS | St Maries | 85 | Benewah County |
| Evolution Plaza | ID7100213 | NTNCWS | Idaho Falls | 90 | Bonneville County |
| Fab Tec | ID2290059 | NTNCWS | Moscow | 40 | Latah County |
| Fairfield City Of | ID5130001 | CWS | Fairfield | 441 | Camas County |
| Fairview North | ID7100028 | NTNCWS | Idaho Falls | 350 | Bonneville County |
| Fairview Water Dist | ID6210006 | CWS | Preston | 1,300 | Franklin County |
| Faith Journey Church | ID3140250 | NTNCWS | Caldwell | 205 | Canyon County |
| Falcon Ridge Subdivision | ID7100208 | CWS | Idaho Falls | 75 | Bonneville County |
| Fall River Electric | ID7220131 | NTNCWS | Ashton | 35 | Fremont County |
| Farragut Village Property Assn Inc | ID1280070 | CWS | Athol | 130 | Kootenai County |
| Federal Cartridge Company | ID2350021 | NTNCWS | Lewiston | 765 | Nez Perce County |
| Fedex Distribution Center Blackfoot | ID6060123 | NTNCWS | Blackfoot | 45 | Bingham County |
| Fedex Distribution Center Rigby | ID7260090 | NTNCWS | Moon Township | 35 | Jefferson County |
| Fenn Community System | ID2250018 | CWS | Fenn | 30 | Idaho County |
| Ferdinand City Of | ID2250019 | CWS | Ferdinand | 133 | Idaho County |
| Fernan Estates Corporation | ID1280322 | CWS | Coeur D Alene | 37 | Kootenai County |
| Fernwood Water Dist | ID1050011 | CWS | Fernwood | 521 | Benewah County |
| Filer Water Works | ID5420021 | CWS | Filer | 2,858 | Twin Falls County |
| Fir Grove Estates | ID4430104 | CWS | Donnelly | 270 | Valley County |
| First Apostolic Acts Church | ID2250146 | NTNCWS | Kamiah | 170 | Idaho County |
| Firth City Of | ID6060016 | CWS | Firth | 511 | Bingham County |
| Fish Haven Pipeline Company | ID6040011 | CWS | Fish Haven | 400 | Bear Lake County |
| Flamingo West | ID3140276 | NTNCWS | Notus | 320 | Canyon County |
| Flying H Trailer Ranch | ID4010062 | CWS | Boise | 430 | Ada County |
| Flying W Ranch | ID1280287 | CWS | Athol | 46 | Kootenai County |
| Forrey Heights | ID4010063 | CWS | Kuna | 49 | Ada County |
| Four Seasons Water Company | ID6060019 | CWS | Blackfoot | 96 | Bingham County |
| Fox Creek Country Club Estates | ID7410034 | CWS | Driggs | 250 | Teton County |
| Franklin City Of | ID6210007 | CWS | Franklin | 1,000 | Franklin County |
| Franklin Domestic Water Users | ID4010064 | CWS | Boise | 75 | Ada County |
| Frazier Industrial Company | ID7100224 | NTNCWS | Idaho | 300 | Bonneville County |
| Galena Mine Water System | ID1400081 | NTNCWS | Wallace | 250 | Shoshone County |
| Gannett Homeowners Assn | ID5070086 | CWS | Bellevue | 60 | Blaine County |
| Garden Valley High School | ID4080017 | NTNCWS | Garden Vally | 200 | Boise County |
| Garden Valley Ranchettes Homeowners | ID4080018 | CWS | Garden Valley | 78 | Boise County |
| Garwood Water Coop | ID1280225 | CWS | Hayden | 410 | Kootenai County |
| Gayle Manufacturing Co | ID3140263 | NTNCWS | Notus | 87 | Canyon County |
| Gem Lake Industrial Park | ID7100225 | NTNCWS | Idaho Falls | 90 | Bonneville County |
| Gem Lake Water System | ID7100220 | NTNCWS | Idaho Falls | 200 | Bonneville County |
| Gem State - Bar Circle S Ranch | ID1280010 | CWS | Coeur D'Alene | 633 | Kootenai County |
| Gem State - Bitterroot Water Company | ID1280260 | CWS | Coeur D'Alene | 428 | Kootenai County |
| Gem State - Diamond Bar Estates | ID1280268 | CWS | Coeur D'Alene | 143 | Kootenai County |
| Gem State - Happy Valley Water System | ID1280220 | CWS | Coeur D'Alene | 60 | Kootenai County |
| Gem State - Lynnwood Estates | ID1280259 | CWS | Coeur D'Alene | 60 | Kootenai County |
| Gem State - Spirit Lake East | ID1280176 | CWS | Coeur D'Alene | 843 | Kootenai County |
| Gem State Academy | ID3140038 | CWS | Caldwell | 121 | Canyon County |
| Genesee City Of | ID2290015 | CWS | Genesee | 1,044 | Latah County |
| Georgetown City Of | ID6040013 | CWS | Georgetown | 476 | Bear Lake County |
| Glanbia Foods Inc | ID5240039 | NTNCWS | Twin Falls | 250 | Gooding County |
| Glenns Ferry City Of | ID4200022 | CWS | Glenns Ferry | 1,282 | Elmore County |
| Golden Eagle Ranch | ID5070088 | CWS | Ketchum | 120 | Blaine County |
| Golden Rail Trailer Court | ID5160017 | CWS | Jerome | 70 | Cassia County |
| Golf Club Estates Water Inc | ID1090103 | CWS | Priest Lake | 140 | Bonner County |
| Goose Creek Rentals | ID3020007 | CWS | Indian Valley | 26 | Adams County |
| Gotham Bay Estates | ID1280311 | CWS | Harrison | 61 | Kootenai County |
| Gozzer Ranch | ID1280321 | NTNCWS | Rathdrum | 970 | Kootenai County |
| Gpod Of Idaho | ID6060102 | NTNCWS | Shelly | 100 | Bingham County |
| Grace City Of | ID6150010 | CWS | Grace | 920 | Caribou County |
| Grain Craft | ID6060128 | NTNCWS | Pocatello | 50 | Bingham County |
| Grand View, City Of | ID3370010 | CWS | Grand View | 452 | Owyhee County |
| Grandma Garcias Kitchen | ID5340001 | NTNCWS | Rupert | 50 | Minidoka County |
| Greenferry Water & Sewer District | ID1280077 | CWS | Hayden | 978 | Kootenai County |
| Greenfield Water And Sewer | ID6060026 | CWS | Shelley | 240 | Bingham County |
| Greenhills Estates 3 | ID4010069 | CWS | Meridian | 200 | Ada County |
| Greenhorn Subd | ID5070020 | CWS | Ketchum | 75 | Blaine County |
| Greenleaf City Of | ID3140041 | CWS | Greenleaf | 846 | Canyon County |
| Grouse Point Water Company Llc | ID4010232 | CWS | Eagle | 70 | Ada County |
| Grove Creek Subd Water Assn | ID7410020 | CWS | Victor | 30 | Teton County |
| Groveland Elementary School Dist 55 | ID6060028 | NTNCWS | Blackfoot | 350 | Bingham County |
| Groveland Water And Sewer Dist | ID6060095 | CWS | Blackfoot | 295 | Bingham County |
| Gsa Eastport Border Station | ID1110031 | NTNCWS | Oroville | 50 | Boundary County |
| H And L Park | ID3140060 | CWS | Boise | 43 | Canyon County |
| Hackney Water And Sewer Dist | ID1280080 | CWS | Athol | 108 | Kootenai County |
| Hagerman City Of | ID5240012 | CWS | Hagerman | 988 | Gooding County |
| Hamer School | ID7260012 | NTNCWS | Terreton | 42 | Jefferson County |
| Hamilton Place | ID4200037 | CWS | Houston | 97 | Elmore County |
| Hammett Haven Apartments | ID4200023 | CWS | Mountain Home | 64 | Elmore County |
| Hansen City Of | ID5420027 | CWS | Hansen | 1,200 | Twin Falls County |
| Harbor View Estates Water & Sewer Dist | ID1280222 | CWS | Coeur D Alene | 355 | Kootenai County |
| Harding Acres Tracts Water Assn Inc | ID1280081 | CWS | Hayden | 64 | Kootenai County |
| Harrison City Of | ID1280083 | CWS | Plummer | 456 | Kootenai County |
| Hauser Lake Heights | ID1280289 | CWS | Post Falls | 257 | Kootenai County |
| Hauser Lake Water Assn Inc | ID1280084 | CWS | Hauser | 1,575 | Kootenai County |
| Hawks Bay Estates Hoa Llc | ID4430106 | CWS | Donnelly | 59 | Valley County |
| Hayden Haven / Gem Shores | ID1280085 | CWS | Rathdrum | 236 | Kootenai County |
| Hayden Orchards Water System | ID1280088 | CWS | Rathdrum | 122 | Kootenai County |
| Hayden Pines Grouse Meadows | ID1280257 | CWS | Rathdrum | 1,188 | Kootenai County |
| Hazelton City Of | ID5270007 | CWS | Hazelton | 899 | Jerome County |
| Heatherlands Subd | ID5070023 | CWS | Ketchum | 200 | Blaine County |
| Hecla Mining Company Lucky Friday | ID1400028 | NTNCWS | Mullan | 420 | Shoshone County |
| Heyburn Estates | ID5340023 | CWS | Medford | 100 | Minidoka County |
| Hi View Water | ID4010072 | CWS | Kuna | 55 | Ada County |
| Hibbard Elementary | ID7330009 | NTNCWS | Rexburg | 300 | Madison County |
| Hidden Hill Mobile Home Park | ID1280092 | CWS | Post Falls | 40 | Kootenai County |
| Hidden Pines Trailer Park | ID1090086 | CWS | Sagle | 62 | Bonner County |
| Hidden Valley Water Assn | ID1280093 | CWS | Hayden | 125 | Kootenai County |
| Hidden Village Mhp, Llc | ID2290004 | CWS | Seattle | 66 | Latah County |
| Highway 54 Water Association, Inc | ID1280221 | CWS | Post Falls | 100 | Kootenai County |
| Highway Estates Water Assn | ID7100035 | CWS | Idaho Falls | 65 | Bonneville County |
| Hillman Trailer Court | ID7260084 | CWS | Rigby | 45 | Jefferson County |
| Hillsdale Estates Homeowners Assn | ID4010218 | CWS | Boise | 800 | Ada County, Canyon County |
| Hillside Service Area | ID1280095 | CWS | Rathdrum | 4,140 | Kootenai County |
| Hillview Subd | ID7330011 | CWS | Rexburg | 50 | Madison County |
| Hk Contractors | ID7100190 | NTNCWS | Pocatello | 30 | Bonneville County |
| Holiday Acres Water Assn | ID1280097 | CWS | Spirit Lake | 480 | Kootenai County |
| Holiday Highway Subd | ID5070025 | CWS | Hailey | 45 | Blaine County |
| Hollister City Of | ID5420030 | CWS | Hollister | 220 | Twin Falls County |
| Homedale City Of | ID3370012 | CWS | Homedale | 3,300 | Owyhee County |
| Hoo Doo Harvard Water And Sewer Dist | ID2290017 | CWS | Harvard | 82 | Latah County |
| Hope Elementary School | ID1090185 | NTNCWS | Sandpoint | 125 | Bonner County |
| Hope House (Owyhee) | ID3370036 | CWS | Marsing | 78 | Owyhee County |
| Hope Water System | ID1090052 | CWS | Sandpoint | 180 | Bonner County |
| Horizon Ridge Subdivision | ID3140281 | CWS | Nampa | 75 | Canyon County |
| Horseshoe Bend Water Supply | ID4080024 | CWS | Horseshoe Bend | 750 | Boise County |
| Horseshu Vue Ranch Subd | ID4080095 | CWS | Horseshoe Bend | 51 | Boise County |
| Howe Townsite | ID6120006 | CWS | Howe | 55 | Butte County |
| Hoyt Bluff Water Association | ID1280288 | CWS | Rathdrum | 151 | Kootenai County |
| Huckleberry Bay Water System | ID1090209 | CWS | Coolin | 362 | Bonner County |
| Huetter City Of | ID1280100 | CWS | Coeur D'Alene | 70 | Kootenai County |
| Hulen Meadows Water Company | ID5070026 | CWS | Ketchum | 390 | Blaine County |
| Idaho City Water Dept | ID4080025 | CWS | Idaho City | 531 | Boise County |
| Idaho Club | ID1090297 | CWS | Sandpoint | 300 | Bonner County |
| Idaho Concrete Company | ID4010216 | NTNCWS | Meridian | 45 | Ada County |
| Idaho Light Industrial | ID1280360 | NTNCWS | Walla Walla | 25 | Kootenai County |
| Idaho Materials And Construction | ID6030065 | NTNCWS | Pocatello | 33 | Bannock County |
| Idaho National Guard Ortc Facility | ID4010234 | NTNCWS | Boise | 600 | Ada County |
| Idaho National Guard Range Center Of O&M | ID4010256 | NTNCWS | Boise | 50 | Ada County |
| Idaho Pacific Corp | ID7260030 | NTNCWS | Ririe | 225 | Jefferson County |
| Idaho Supreme | ID6060034 | NTNCWS | Firth | 250 | Bingham County |
| Idaho Timber Corp | ID3440025 | NTNCWS | Meridian | 36 | Washington County |
| Idaho West Estates | ID3380035 | CWS | Notus | 98 | Canyon County, Payette County |
| Idaho Youth Ranch Hands Of Promise | ID3140274 | CWS | Notus | 95 | Canyon County |
| Idahoan Foods Idaho Falls Plant | ID7100083 | NTNCWS | Lewisville | 200 | Bonneville County |
| Idahoan Foods Lewisville Office &Pckging | ID7260067 | NTNCWS | Lewisville | 170 | Jefferson County |
| Idahoan Foods Lewisville Plant | ID7260016 | NTNCWS | Lewisville | 200 | Jefferson County |
| Idfg - Mv Regional Office | ID5270030 | NTNCWS | Jerome | 33 | Jerome County |
| Idfg Salmon Region | ID7300128 | NTNCWS | Salmon | 45 | Lemhi County |
| Idhw Southwest Idaho Treatment Center | ID3140115 | CWS | Boise | 168 | Canyon County |
| Idjc Juvenile Corrections Center | ID7220087 | CWS | St Anthony | 280 | Fremont County |
| Idle Wheels Mhp Cat Llc | ID6060035 | CWS | Twin Falls | 85 | Bingham County |
| Idoc Idaho State Correctional Center | ID4010240 | CWS | Boise | 2,204 | Ada County |
| Idoc Mountain View Transformation Center | ID4010255 | CWS | Boise | 456 | Ada County |
| Idoc North Idaho Correctional Institute | ID2250041 | CWS | Cottonwood | 425 | Idaho County |
| Idoc Sbx Complex | ID4010141 | CWS | Boise | 3,309 | Ada County |
| Imagination Station | ID3440010 | NTNCWS | Weiser | 60 | Washington County |
| Independent Meat | ID5420111 | NTNCWS | Twin Falls | 180 | Twin Falls County |
| Indian Village | ID3140193 | CWS | Nampa | 225 | Canyon County |
| Inkom City Of | ID6030025 | CWS | Inkom | 792 | Bannock County |
| Inl Atr Complex | ID6120020 | NTNCWS | Idaho Falls | 605 | Butte County |
| Inl Cfa | ID6120008 | NTNCWS | Idaho Falls | 585 | Butte County |
| Inl Intec | ID6120012 | NTNCWS | Idaho Falls | 866 | Butte County |
| Inl Mfc | ID6060036 | NTNCWS | Idaho Falls | 1,350 | Bingham County |
| Inl Nrf | ID6120016 | NTNCWS | Idaho Falls | 2,035 | Butte County |
| Inl Rwmc | ID6120018 | NTNCWS | Idaho Falls | 415 | Butte County |
| Inl Tan Ctf | ID6120013 | NTNCWS | Idaho Falls | 350 | Butte County |
| Intermountain Gas Company | ID6030070 | NTNCWS | Pocatello | 28 | Bannock County |
| Intermountain Office Warehouse Complex | ID5270035 | NTNCWS | Jerome | 71 | Jerome County |
| Iona Water Dept | ID7100041 | CWS | Iona | 2,717 | Bonneville County |
| Ireland Acres 1 | ID7260017 | CWS | Ogden | 54 | Jefferson County |
| Ironwood | ID7410047 | CWS | Orem | 125 | Teton County |
| Island Park Village | ID7220037 | NTNCWS | Island Park | 305 | Fremont County |
| Island Village Mobile Home Park | ID4010076 | CWS | Boise | 70 | Ada County |
| Itafos Conda Llc (Formerly Agrium) | ID6150003 | NTNCWS | Soda Springs | 350 | Caribou County |
| J And K Water Corp | ID7100044 | CWS | Idaho Falls | 370 | Bonneville County |
| Jackalope Assn | ID7410022 | CWS | Victor | 28 | Teton County |
| Jbs Country Court | ID5340005 | CWS | Burley | 140 | Minidoka County |
| Jefferson Alternative School | ID7260053 | NTNCWS | Rigby | 30 | Jefferson County |
| Jefferson Greens Estates | ID7260075 | CWS | Ribgy | 193 | Jefferson County |
| Jenco Acres | ID7260018 | CWS | Rigby | 105 | Jefferson County |
| Jerome Cheese Company | ID5270027 | NTNCWS | Jerome | 400 | Jerome County |
| Journeys End | ID6060118 | CWS | Shelley | 180 | Bingham County |
| Jug Mountain Ranch Subdivision | ID4430102 | CWS | Mccall | 100 | Valley County |
| Jughandle Estates | ID4430026 | CWS | Mccall | 200 | Valley County |
| Juliaetta City Of | ID2290018 | CWS | Juliaetta | 624 | Latah County, Nez Perce County |
| Kamiah | 101611104 | CWS | Lapwai | 200 | Idaho County |
| Kamiah City Of | ID2310003 | CWS | Kamiah | 1,495 | Lewis County |
| Kamiah Valley Company Llc | ID2250033 | CWS | Kamiah | 250 | Idaho County |
| Kanaka Rapids Ranch Water System Inc | ID5420089 | CWS | Buhl | 240 | Twin Falls County |
| Karcher Acres Subd | ID3140048 | CWS | Nampa | 100 | Canyon County |
| Karcher Ranchette Water Corp | ID3140049 | CWS | Caldwell | 213 | Canyon County |
| Karey Lane Well Inc | ID7100081 | CWS | Idaho Falls | 38 | Bonneville County |
| Kendrick City Of | ID2290019 | CWS | Kendrick | 313 | Latah County |
| Kidd Island Bay Water Users | ID1280104 | CWS | Coeur D Alene | 153 | Kootenai County |
| Kimberly City Of | ID5420033 | CWS | Kimberly | 5,359 | Twin Falls County |
| Kimpton Acres Third Subd | ID3140051 | CWS | Middleton | 88 | Canyon County |
| King Hill Domestic Water And Sewer | ID4200026 | CWS | King Hill | 87 | Elmore County |
| Kings Pines Estates Water System | ID3020038 | CWS | Mccall | 96 | Adams County, Valley County |
| Kingston Water Dist 1 | ID1400030 | CWS | Kingston | 585 | Shoshone County |
| Kjs Travel Center | ID7100178 | NTNCWS | Idaho Falls | 65 | Bonneville County |
| Klim | ID7260087 | NTNCWS | Rigby | 125 | Bonneville County, Jefferson County |
| Klugherz Water Corp | ID4010083 | CWS | Boise | 200 | Ada County |
| Kootenai County Water Dist 1 | ID1280106 | CWS | Coeur D'Alene | 843 | Kootenai County |
| Kootenai Heights | ID1090271 | CWS | Sandpoint | 25 | Bonner County |
| Kootenai High School Dist 274 | ID1280107 | NTNCWS | Harrison | 255 | Kootenai County |
| Krizview Park | ID4010178 | CWS | Boise | 120 | Ada County |
| Kullyspell Estates | ID1090053 | CWS | Hope | 92 | Bonner County |
| Kuna East | ID4010273 | NTNCWS | Kuna | 100 | Ada County |
| Kws Seeds Llc | ID5420108 | NTNCWS | Kimberly | 30 | Twin Falls County |
| Laceys Vista Acres Water Corp | ID6030029 | CWS | Chubbuck | 200 | Bannock County |
| Laclede Water Dist | ID1090073 | CWS | Sandpoint | 668 | Bonner County |
| Lacon Water Co Op | ID1280108 | NTNCWS | Harrison | 68 | Kootenai County |
| Lake Forest Homes Assn Inc | ID1280109 | CWS | Rathdrum | 98 | Kootenai County |
| Lakeland Meadows | ID1280343 | CWS | Coeur D'Alene | 25 | Kootenai County |
| Lakeridge Second Subd | ID3140056 | CWS | Nampa | 50 | Canyon County |
| Lakeview Water District | ID2180020 | CWS | Orofino | 45 | Clearwater County |
| Lakeview Hills Water Users Association | ID3140062 | CWS | Nampa | 160 | Canyon County |
| Lakeview Water Company 1 | ID3140059 | CWS | Notus | 100 | Canyon County |
| Lakeys Cafe And Trailer Park | ID3140061 | CWS | Boise | 300 | Canyon County |
| Lamb Weston Inc. | ID6390013 | NTNCWS | American Falls | 600 | Power County |
| Lansing Meadows | ID3140231 | CWS | Middleton | 320 | Canyon County |
| Lapwai City Of | ID2350011 | CWS | Lapwai | 325 | Nez Perce County |
| Lava Hot Springs City Of | ID6030030 | CWS | Lava Hot Springs | 386 | Bannock County |
| Lawyers Creek Water Dist | ID2310004 | CWS | Kamiah | 50 | Lewis County |
| Lazy Eight Estates | ID7100215 | CWS | Idaho Falls | 60 | Bonneville County |
| Lazy River Mobile Home Park 1 | ID3380019 | CWS | Garden City | 41 | Payette County |
| Leadore School | ID7300022 | NTNCWS | Leadore | 140 | Lemhi County |
| Leisure Acres Trailer Court | ID1400032 | CWS | Rathdrum | 180 | Shoshone County |
| Leisure Heights Homeowners Association | ID3140063 | CWS | Nampa | 142 | Canyon County |
| Leisure Park | ID1280117 | CWS | Coeur D Alene | 480 | Kootenai County |
| Liberty Estates | ID7330065 | CWS | Auburn | 300 | Madison County |
| Lighthouse Montessori School | ID7100221 | NTNCWS | Idaho Falls | 125 | Bonneville County |
| Linda Vista Mobile Home Park | ID4010088 | CWS | Boise | 125 | Ada County |
| Lindenwood Water Assn | ID3140010 | CWS | Nampa | 48 | Canyon County |
| Little Blacktail Ranch Water District | ID1090182 | CWS | Athol | 95 | Bonner County |
| Locust Subd | ID3140066 | CWS | Nampa | 42 | Canyon County |
| Loma Linda Water Corp | ID3380007 | CWS | Fruitland | 70 | Payette County |
| Lone Mountain Estates | ID1280346 | CWS | Hayden | 448 | Kootenai County |
| Lorraines Daycare | ID5160074 | NTNCWS | Burley | 70 | Cassia County |
| Lost Creek Estates Water | ID1280331 | CWS | Coeur D Alene | 277 | Kootenai County |
| M & T Water Corp | ID3140097 | CWS | Nampa | 100 | Canyon County |
| M And M Mountain View Subd Em2 | ID3140067 | CWS | Nampa | 54 | Canyon County |
| M And T Water And Sewer Dist | ID7260026 | CWS | Monteview | 358 | Jefferson County |
| Mackay City Of | ID7190032 | CWS | Mackay | 566 | Custer County |
| Maddens Facility | ID3140240 | NTNCWS | Orem | 60 | Canyon County |
| Malabar Mobile Home Park | ID1280224 | CWS | Athol | 60 | Kootenai County |
| Malad And Hilton Water Company Inc. | ID4010092 | CWS | Boise | 70 | Ada County |
| Malad City Of | ID6360006 | CWS | Malad | 2,200 | Oneida County |
| Malta Schools | ID5160030 | NTNCWS | Burley | 440 | Cassia County |
| Mangum Heights Subd | ID3140068 | CWS | Notus | 75 | Canyon County |
| Marble Front Headstart | ID3140223 | NTNCWS | Payette | 110 | Canyon County |
| Marsing City Of | ID3370013 | CWS | Marsing | 1,300 | Owyhee County |
| Mart Produce | ID5340034 | NTNCWS | Rupert | 90 | Minidoka County |
| Maverick Subd Lasher Construction | ID3140069 | CWS | Notus | 90 | Canyon County |
| Mccain Foods | ID5160036 | NTNCWS | Burley | 267 | Cassia County |
| Mccammon City Of | ID6030038 | CWS | Mccammon | 800 | Bannock County |
| Mcguire Estates Water Users | ID1280118 | CWS | Post Falls | 158 | Kootenai County |
| Meadow Creek Property Owners Assn Inc | ID3020009 | CWS | New Meadows | 800 | Adams County |
| Meadow Lark Court Llc | ID7330014 | CWS | Ammon | 45 | Madison County |
| Meadow Wood Water System | ID1090224 | CWS | Athol | 52 | Bonner County |
| Meadowland Acres | ID1280277 | CWS | Rathdrum | 63 | Kootenai County |
| Meadows At West Mountain | ID4430103 | CWS | Meridian | 550 | Valley County |
| Meadows Mobile Park | ID4200031 | CWS | Provo | 175 | Elmore County |
| Meander Point Subd | ID5420040 | CWS | Twin Falls | 140 | Twin Falls County |
| Melaleuca Warehouse Facility | ID7100203 | NTNCWS | Idaho Falls | 1,397 | Bonneville County |
| Melba City Of | ID3140070 | CWS | Melba | 648 | Canyon County |
| Mellen Subd Water Dist | ID4200089 | CWS | Mountain Home | 250 | Elmore County |
| Mid Valley Water Company Llc | ID5070038 | CWS | Hailey | 450 | Blaine County |
| Midvale Water System | ID3440007 | CWS | Notus | 144 | Washington County |
| Midway Elementary School | ID7260023 | NTNCWS | Rigby | 384 | Jefferson County |
| Midway Water System Inc | ID6210029 | CWS | Dayton | 50 | Franklin County |
| Miller Country Estates | ID7100184 | CWS | Idaho Falls | 83 | Bonneville County |
| Minico High School | ID5340008 | NTNCWS | Rupert | 1,100 | Minidoka County |
| Minidoka City Of | ID5340010 | CWS | Minidoka | 120 | Minidoka County |
| Mink Creek Mountain Estates | ID6030040 | CWS | Pocatello | 27 | Bannock County |
| Mission Creek Water Assn | ID1110019 | CWS | Bonners Ferry | 263 | Boundary County |
| Monastery Of St Gertrudes | ID2250045 | CWS | Cottonwood | 200 | Idaho County |
| Montpelier City Of | ID6040021 | CWS | Montpelier | 2,772 | Bear Lake County |
| Moore Water And Sewer Assn | ID6120022 | CWS | Moore | 196 | Butte County |
| Moose Mountain | ID6030089 | CWS | Inkom | 27 | Bannock County |
| Moravia Water Assn | ID1110020 | CWS | Bonners Ferry | 80 | Boundary County |
| Moreland School | ID6060048 | NTNCWS | Blackfoot | 360 | Bingham County |
| Moreland Water And Sewer District | ID6060117 | CWS | Moreland | 364 | Bingham County |
| Mores Creek Rim Ranch Water Dist | ID4080029 | CWS | Boise | 140 | Boise County |
| Morning View Water Company | ID7260063 | CWS | Idaho Falls | 459 | Jefferson County |
| Morrison Estates Homeowner Water Assn | ID1280122 | CWS | Coeur D Alene | 80 | Kootenai County |
| Mountain Home Migrant Head Start | ID4200090 | NTNCWS | Caldwell | 78 | Elmore County |
| Mountain Humane | ID5070095 | NTNCWS | Hailey | 25 | Blaine County |
| Mountain Sage | ID4200073 | CWS | Boise | 65 | Elmore County |
| Mountain Shadows Hoa Inc. | ID4080100 | CWS | Garden Valley | 89 | Boise County |
| Mountain Springs Water Corporation | ID1090200 | CWS | Sagle | 338 | Bonner County |
| Mountain View At Farragut Park | ID1280308 | CWS | Athol | 62 | Kootenai County |
| Mountain View Court | ID7220008 | CWS | Idaho Falls | 40 | Fremont County |
| Mountain View Estates | ID1400088 | CWS | Boise | 43 | Shoshone County |
| Mountain View Park | ID1280124 | CWS | Coeur D'Alene | 97 | Kootenai County |
| Mountain View Rv West | ID4430023 | CWS | Williamsburg | 75 | Valley County |
| Mountain View Terrace | ID1280123 | CWS | Rathdrum | 445 | Kootenai County |
| Mountain View Water And Road Assn | ID4080031 | CWS | Garden Valley | 305 | Boise County |
| Mountain View Water Corp | ID5240019 | CWS | Gooding | 60 | Gooding County |
| Mountain West Products | ID7330064 | NTNCWS | Rexburg | 30 | Madison County |
| Moyie Springs City Of | ID1110021 | CWS | Moyie Springs | 1,123 | Boundary County |
| Murphy Water System | ID3370014 | CWS | Murphy | 75 | Owyhee County |
| Murray Water Assn Inc | ID1400039 | CWS | Murray | 35 | Shoshone County |
| Murtaugh City Of | ID5420042 | CWS | Murtaugh | 130 | Twin Falls County |
| New Hope Subd | ID2180023 | CWS | Lenore | 100 | Clearwater County |
| New Horizons Water Inc | ID4200033 | CWS | Mountain Home | 85 | Elmore County |
| New Life Community Church | ID1280274 | NTNCWS | Rathdrum | 450 | Kootenai County |
| New Meadows City Of | ID3020012 | CWS | New Meadows | 582 | Adams County |
| New Phase Investments Llc | ID7100222 | NTNCWS | Idaho Falls | 30 | Bonneville County |
| New Plymouth City Of | ID3380008 | CWS | New Plymouth | 1,600 | Payette County |
| Newdale City Of | ID7220047 | CWS | Newdale | 340 | Fremont County |
| Nezperce Water Dept | ID2310005 | CWS | Nezperce | 460 | Lewis County |
| Nielsons Country Court | ID5160032 | CWS | Kimberly | 70 | Cassia County, Twin Falls County |
| Nightforce Optics | ID2180058 | NTNCWS | Orofino | 110 | Clearwater County |
| North Fork Water Works | ID7220049 | CWS | Rexburg | 64 | Fremont County |
| North Hills Mobile Village | ID4010106 | CWS | Kuna | 63 | Ada County |
| North Lapwai | 101611105 | CWS | Lapwai | 110 | Nez Perce County |
| North Rim Fairways | ID5270017 | CWS | Jerome | 150 | Jerome County |
| North Tomer Butte W&S District | ID2290010 | CWS | Moscow | 259 | Latah County |
| Northern Lights | ID1090243 | NTNCWS | Sandpoint | 50 | Bonner County |
| Northridge Estates Water Assn | ID3140082 | CWS | Middleton | 75 | Canyon County |
| Northside Estates Hoa Inc | ID3140229 | CWS | Nampa | 100 | Canyon County |
| Northside Estates Well | ID7100060 | CWS | Idaho Falls | 30 | Bonneville County |
| Northside Water Users Assn | ID1090090 | CWS | Sandpoint | 413 | Bonner County |
| Northstar Subdivision | ID3140278 | CWS | Nampa | 50 | Canyon County |
| Northview Subdivision | ID5240040 | CWS | Hagerman | 47 | Gooding County |
| Notus City Of | ID3140083 | CWS | Notus | 539 | Canyon County |
| Nur Water Assn | ID7100061 | CWS | Iona | 60 | Bonneville County |
| Nw Lineman College | ID4010269 | NTNCWS | Meridian | 250 | Ada County |
| Oakdell Farms Llc | ID6210015 | CWS | Franklin | 75 | Franklin County |
| Oakleaf Subdivision | ID4200096 | CWS | Mountain Home | 71 | Elmore County |
| Oakley City Of | ID5160035 | CWS | Oakley | 821 | Cassia County |
| Oakley Valley Water Corporation | ID5160031 | CWS | Oakley | 500 | Cassia County |
| Oden View Estates Improvement Assn | ID1090091 | CWS | Sandpoint | 64 | Bonner County |
| Oden Water Assn Inc | ID1090092 | CWS | Sandpoint | 1,524 | Bonner County |
| Ohio Match Estates | ID1280127 | CWS | Rathdrum | 118 | Kootenai County |
| Ohio Match Road Water Dist | ID1280128 | CWS | Hayden | 245 | Kootenai County |
| Ok Water Assn | ID3140085 | CWS | Nampa | 140 | Canyon County |
| Onaway Water And Sewer Assn | ID2290026 | CWS | Potlatch | 200 | Latah County |
| Orofino City Of | ID2180024 | CWS | Orofino | 2,459 | Clearwater County |
| Osgood School | ID7100063 | NTNCWS | Caldwell | 73 | Bonneville County |
| Osprey | ID4080101 | CWS | Boise | 100 | Boise County |
| Overlook Mobile Home Village | ID5160037 | CWS | Stevenson | 120 | Cassia County |
| Owyhee Village Subd Water Assn Inc | ID3140087 | CWS | Caldwell | 200 | Canyon County |
| Pa'Aoa Llc | ID3140260 | NTNCWS | Notus | 35 | Canyon County |
| Pacific Cabinets Inc | ID2250145 | NTNCWS | Ferdinand | 62 | Idaho County |
| Pacific Steel And Recycling #50 | ID4200110 | NTNCWS | South Great Falls | 25 | Elmore County |
| Palouse Hills Christian School | ID2290027 | NTNCWS | Moscow | 25 | Latah County |
| Panhandle Mobile Estates | ID1280130 | CWS | Rathdrum | 168 | Kootenai County |
| Panhandle Mobile Home Park | ID1280131 | CWS | Coeur D'Alene | 50 | Kootenai County |
| Panhandle Village Water System | ID1280132 | CWS | Rathdrum | 105 | Kootenai County |
| Panorama Hills Water Company | ID7100067 | CWS | Iona | 175 | Bonneville County |
| Par Estates Homeowners Assn | ID3140180 | CWS | Caldwell | 140 | Canyon County |
| Paradise Estates Water Corp | ID4010111 | CWS | Boise | 273 | Ada County |
| Paradise Valley Water Assn | ID1110023 | CWS | Bonners Ferry | 250 | Boundary County |
| Paris City Of | ID6040022 | CWS | Paris | 540 | Bear Lake County |
| Parker City Of | ID7220051 | CWS | Parker | 322 | Fremont County |
| Parkview Water Assn | ID1280135 | CWS | Hayden | 90 | Kootenai County |
| Parkwood Acres Water Company | ID7260029 | CWS | Rigby | 88 | Jefferson County |
| Parma City Of | ID3140089 | CWS | Parma | 2,250 | Canyon County |
| Parma Research And Extension Center | ID3140201 | NTNCWS | Parma | 42 | Canyon County |
| Partners Produce | ID3380038 | NTNCWS | Payette | 50 | Payette County |
| Paul City Of | ID5340014 | CWS | Paul | 1,195 | Minidoka County |
| Paul Housing Authority | ID5340015 | CWS | Rupert | 250 | Minidoka County |
| Peck Water System | ID2350023 | CWS | Peck | 196 | Nez Perce County |
| Pelican Point Subdivision | ID5340031 | CWS | Rupert | 142 | Minidoka County |
| Pepperwood Crossing/Rocky Mnt Utilities | ID7260080 | CWS | Rigby | 336 | Jefferson County |
| Perpetua Resources | ID4430115 | NTNCWS | Boise | 120 | Valley County |
| Picabo Water System | ID5070041 | CWS | Picabo | 50 | Blaine County |
| Picket Corral Owners Association | ID3230027 | CWS | Emmett | 35 | Gem County |
| Pine Haven Park | ID1280139 | CWS | Coeur D'Alene | 66 | Kootenai County |
| Pine Ridge Water And Sewer Dist | ID2250134 | CWS | Kamiah | 390 | Idaho County |
| Pine Villa Park And Water Assn | ID1280142 | CWS | Post Falls | 500 | Kootenai County |
| Pinehurst Water Dist | ID1400041 | CWS | Pinehurst | 1,950 | Shoshone County |
| Pineview Estates Water Dist | ID1280141 | CWS | Athol | 450 | Kootenai County |
| Pinewood Estates | ID7100071 | CWS | Orem | 450 | Bonneville County |
| Pioneer Acres | ID6060056 | CWS | Moreland | 110 | Bingham County |
| Pioneer Mobile Home Park Llc | ID3370035 | CWS | Boise | 53 | Owyhee County |
| Pleasant Acres Mobile Home Park | ID4200001 | CWS | Pocatello | 85 | Elmore County |
| Pleasant Acres Water And Sewer Dist | ID2180028 | CWS | Weippe | 89 | Clearwater County |
| Pleasant View Manor | ID3140079 | CWS | Caldwell | 100 | Canyon County |
| Pleasant View Water Association Inc | ID1280340 | NTNCWS | Dalton Gardens | 26 | Kootenai County |
| Plummer City Of | ID1050021 | CWS | Plummer | 1,034 | Benewah County |
| Plummer Tribal Community | 101612110 | CWS | Plummer | 515 | |
| Ponderosa Mobile Home Park | ID1090059 | CWS | Sagle | 72 | Bonner County |
| Prairie Schooner Estates | ID1280057 | CWS | Athol | 115 | Kootenai County |
| Prairie Water Assn | ID1280149 | CWS | Hayden | 30 | Kootenai County |
| Preston Eastside Water Co | ID6210012 | CWS | Preston | 120 | Franklin County |
| Priest Lake Elementary School | ID1090102 | NTNCWS | Priest River | 75 | Bonner County |
| Priest Lake Water, Llc | ID1090229 | CWS | Priest River | 178 | Bonner County |
| Priest River City Of | ID1090107 | CWS | Priest River | 2,173 | Bonner County |
| Project Patch | ID4080093 | NTNCWS | Garden Valley | 30 | Boise County |
| Purple Sage Community | ID3140091 | CWS | Spring | 98 | Canyon County |
| Purple Sage Elementary | ID3140234 | NTNCWS | Caldwell | 410 | Canyon County |
| Q B Corp | ID7300111 | NTNCWS | Salmon | 55 | Lemhi County |
| R And V Mobile Home Park | ID3230028 | CWS | Emmett | 27 | Gem County |
| Ramsey Estates | ID1280285 | CWS | Coeur D'Alene | 88 | Kootenai County |
| Ranch Subd | ID4080036 | CWS | Boise | 65 | Boise County |
| Ranch Valley Water Assn | ID1280151 | CWS | Rathdrum | 45 | Kootenai County |
| Rancho Via Well Users Assn Inc | ID7100149 | CWS | Idaho Falls | 40 | Bonneville County |
| Rapid River Water & Sewer Dist | ID2250050 | CWS | Riggins | 120 | Idaho County |
| Real Alloy Recycling Inc | ID1280239 | NTNCWS | Post Falls | 44 | Kootenai County |
| Recreational Sports And Imports | ID7100126 | NTNCWS | Idaho Falls | 120 | Bonneville County |
| Red Pheasant Water Company Llc | ID2350040 | CWS | Lewiston | 480 | Nez Perce County |
| Red Rock Water Llc | ID2350025 | CWS | Lewiston | 60 | Nez Perce County |
| Remington Rec Water Dist | ID1280270 | CWS | Athol | 1,104 | Bonner County, Kootenai County |
| Rest Ez Rv Park | ID5240042 | CWS | Hagerman | 25 | Gooding County |
| Reubens City Of | ID2310006 | CWS | Reubens | 70 | Lewis County |
| Rich Subd | ID3140096 | CWS | Caldwell | 60 | Canyon County |
| Richfield City Of | ID5320005 | CWS | Richfield | 501 | Lincoln County |
| Ridge At Sun Up Bay Water System | ID1280324 | CWS | Coeur D Alene | 55 | Kootenai County |
| Rigby Produce Hamer Division | ID7260055 | NTNCWS | Hamer | 125 | Jefferson County |
| Riggins City Of | ID2250053 | CWS | Riggins | 434 | Idaho County |
| Riley Trailer Park | ID4010121 | CWS | Boise | 30 | Ada County |
| Rim Acres Mutual Water | ID4010122 | CWS | Boise | 31 | Ada County |
| Rimrock Jr Sr High School | ID3370018 | NTNCWS | Bruneau | 295 | Owyhee County |
| Rimrock Service Area | ID1280009 | CWS | Rathdrum | 3,493 | Kootenai County |
| Rio Products | ID7100191 | NTNCWS | Idaho Falls | 65 | Bonneville County |
| Rio Vista Water Company 3 | ID3140098 | CWS | Caldwell | 140 | Canyon County |
| Ririe City Of | ID7260034 | CWS | Ririe | 656 | Bonneville County, Jefferson County |
| River At Pine Tree | ID4080108 | NTNCWS | Garden Valley | 40 | Boise County |
| River Haven Rv Park | ID3370038 | NTNCWS | Notus | 25 | Owyhee County |
| River Meadows | ID7410048 | CWS | Jackson | 125 | Teton County |
| River Terrace Mobile Home Park | ID1090126 | CWS | Sandpoint | 90 | Bonner County |
| Riverbend Estates | ID6390018 | CWS | American Falls | 92 | Power County |
| Riverbend Meats | ID7100229 | NTNCWS | Idaho Falls | 242 | Bonneville County |
| Riverence Provisions, Llc | ID5240007 | NTNCWS | Buhl | 180 | Gooding County |
| Rivers Point Property Owners Assn | ID4080037 | CWS | Boise | 140 | Boise County |
| Riverside Elementary School | ID6060060 | NTNCWS | Blackfoot | 300 | Bingham County |
| Riverside Estates | ID6060059 | CWS | Blackfoot | 90 | Bingham County |
| Riverside Trailer Court | ID5160003 | CWS | Twin Falls | 35 | Cassia County |
| Riverside Water And Sewer District | ID2180032 | CWS | Orofino | 2,000 | Clearwater County |
| Riverstone Subdivision | ID6060121 | CWS | Blackfoot | 50 | Bingham County |
| Riverview Acres 2 | ID6060062 | CWS | Blackfoot | 29 | Bingham County |
| Riverview Acres Water Assn 1 | ID6060063 | CWS | Blackfoot | 33 | Bingham County |
| Riverview Villa | ID6060057 | CWS | American Falls | 200 | Bingham County |
| Rivervine Subdivision | ID4010245 | CWS | Nampa | 25 | Ada County |
| Rivervue Middle School | ID3140095 | NTNCWS | Notus | 85 | Canyon County |
| Roberts City Of | ID7260035 | CWS | Roberts | 680 | Jefferson County |
| Rock Ledge Estates | ID5420107 | CWS | Hansen | 150 | Jerome County, Twin Falls County |
| Rockford Elementary | ID6060065 | NTNCWS | Blackfoot | 217 | Bingham County |
| Rockland City Of | ID6390019 | CWS | Rockland | 242 | Power County |
| Rocky Beach Water Dist | ID1280157 | CWS | Spirit Lake | 115 | Kootenai County |
| Rocky Mountain Middle School | ID7100011 | NTNCWS | Idaho Falls | 813 | Bonneville County |
| Rocky Mountain Produce | ID7260027 | NTNCWS | Rigby | 26 | Jefferson County |
| Rogerson Water Dist | ID5420049 | CWS | Rogerson | 75 | Twin Falls County |
| Rolling Hills Acres | ID7260081 | CWS | Ucon | 141 | Jefferson County |
| Rolling Hills Estates Water Company | ID3140100 | CWS | Nampa | 250 | Canyon County |
| Rolling Meadows Ranch | ID1280314 | CWS | Athol | 46 | Kootenai County |
| Rose Garden Mobile Home Park | ID6060067 | CWS | Blackfoot | 84 | Bingham County |
| Rose Lake Water Assn | ID1280161 | CWS | Cataldo | 300 | Kootenai County |
| Roswell Water Users Coop Company | ID3140103 | CWS | Parma | 90 | Canyon County |
| Round Valley Water Assn | ID7190042 | CWS | Challis | 125 | Custer County |
| Royal Highland Water System | ID1280164 | CWS | Post Falls | 275 | Kootenai County |
| Rp Emmett Llc | ID3230086 | NTNCWS | Notus | 60 | Gem County |
| Rustic Acres Mobile Home Park | ID4010126 | CWS | Boise | 540 | Ada County |
| Sage Springs Subdivision | ID5070096 | CWS | Hailey | 53 | Blaine County |
| Sagle Valley Water Dist | ID1090118 | CWS | Coeur D'Alene | 708 | Bonner County |
| Saint Dominic School | ID1280247 | CWS | Post Falls | 228 | Kootenai County |
| Salmon City Of | ID7300042 | CWS | Salmon | 3,158 | Lemhi County |
| Salmon River Meadows Mutual Water Compan | ID7300041 | CWS | Salmon | 47 | Lemhi County |
| Sams Hollow Water Company | ID6040047 | CWS | Garden City | 100 | Bear Lake County |
| Santa Water And Sewer Dist | ID1050023 | CWS | Fernwood | 160 | Benewah County |
| Savory Community Llc | ID1280166 | CWS | Port Orchard | 100 | Kootenai County |
| Sawtooth Estates Water Users | ID4200043 | CWS | Mountain Home | 175 | Elmore County |
| Scenic Mobile Estates | ID1280023 | CWS | Garden City | 85 | Kootenai County |
| Scenic Properties Water Assn Inc | ID4080040 | CWS | Nampa | 40 | Boise County |
| School District 151 Central Office | ID5160086 | NTNCWS | Burley | 25 | Cassia County |
| Schweitzer Basin Water Company | ID1090124 | CWS | Sagle | 955 | Bonner County |
| Schweitzer Mountain Resort | ID1090123 | NTNCWS | Sandpoint | 3,301 | Bonner County |
| Scottys Mobile Home Park | ID4010096 | CWS | Eagle | 42 | Ada County |
| Scriver Woods Homeowners Assn | ID4080034 | CWS | Garden Valley | 160 | Boise County |
| Seasons Road Water Assn | ID1280171 | CWS | Spirit Lake | 50 | Kootenai County |
| Sedero Subd | ID6390022 | CWS | Pocatello | 30 | Power County |
| Sekady Capitol Llc | ID3380022 | NTNCWS | Notus | 30 | Payette County |
| Selkirk Supply | ID1090274 | NTNCWS | Oldtown | 30 | Bonner County |
| Seminis Vegetable Seeds | ID3380034 | NTNCWS | Payette | 30 | Payette County |
| Shadow Butte Elementary School | ID3230074 | NTNCWS | Emmett | 485 | Gem County |
| Shady Rest Rv Park And Campground | ID7100106 | CWS | Idaho Falls | 80 | Bonneville County |
| Shalimar Subd | ID3140107 | CWS | Nampa | 370 | Canyon County |
| Shamrock Villa Water Assn | ID3140108 | CWS | Nampa | 130 | Canyon County |
| Shilo Ranch Estates | ID4080042 | CWS | Garden Valley | 44 | Boise County |
| Shipman Place Subd | ID3140109 | CWS | Nampa | 40 | Canyon County |
| Shoshone Water Works | ID5320006 | CWS | Shoshone | 1,653 | Lincoln County |
| Shotgun Cherokee Subd 5 | ID7220063 | CWS | Island Park | 245 | Fremont County |
| Shotgun North | ID7220065 | CWS | Island Park | 285 | Fremont County |
| Sienna Ridge Estates | ID1280246 | CWS | Athol | 81 | Kootenai County |
| Sierra Water Corp | ID4010133 | CWS | Eagle | 70 | Ada County |
| Silver Leaf Ranch | ID1280318 | CWS | Athol | 57 | Kootenai County |
| Silver Sage Real Property Owners Assn | ID4200045 | CWS | Mountain Home | 30 | Elmore County |
| Silver Spur Subdivision | ID3140233 | CWS | Nampa | 44 | Canyon County |
| Silverwood | ID1280091 | NTNCWS | Athol | 3,930 | Kootenai County |
| Simplot Company Pocatello | ID6390023 | NTNCWS | Pocatello | 370 | Power County |
| Simplot Livestock Company Grandview | ID4200046 | CWS | Grand View | 100 | Elmore County |
| Simplot Potato | ID3140174 | NTNCWS | Caldwell | 450 | Canyon County |
| Simplot Research Center | ID6390035 | NTNCWS | Pocatello | 25 | Power County |
| Singer Ranch Water System | ID1280174 | CWS | Rathdrum | 44 | Kootenai County |
| Skin Creek Water Assn | ID1110025 | CWS | Bonners Ferry | 200 | Boundary County |
| Sky Ranch Estates | ID3140221 | CWS | Nampa | 104 | Canyon County |
| Skyline Water Assn | ID3140111 | CWS | Nampa | 50 | Canyon County |
| Sm Utilities | ID1280294 | CWS | Worley | 58 | Kootenai County |
| Small Wonders Daycare | ID4010258 | NTNCWS | Kuna | 74 | Ada County |
| Smiley Creek Water Users Assn Inc | ID5070087 | CWS | Ketchum | 117 | Blaine County |
| Smith Road Water Users Assn | ID6030049 | CWS | Pocatello | 58 | Bannock County |
| Smoky Canyon Mine Water System | ID6150016 | NTNCWS | Afton | 225 | Caribou County |
| Snake River High School | ID6060074 | NTNCWS | Blackfoot | 745 | Bingham County |
| Snake River Jr High School | ID6060075 | NTNCWS | Blackfoot | 300 | Bingham County |
| Snake River Middle School | ID6060077 | NTNCWS | Blackfoot | 300 | Bingham County |
| Snake River Resort | ID3370030 | CWS | Paso Robles | 150 | Owyhee County |
| Snake River View Estates | ID6060099 | CWS | Blackfoot | 175 | Bingham County |
| Soda Springs City Of | ID6150017 | CWS | Soda Springs | 3,111 | Caribou County |
| Sohns Mobile Home Park Inc | ID7100086 | CWS | Idaho Falls | 32 | Bonneville County |
| Solar Acres Water Association, Llc | ID1090128 | CWS | Hayden | 250 | Bonner County |
| Somerset West Water Corp | ID3140113 | CWS | Caldwell | 203 | Canyon County |
| Sorrento Lactalis | ID3140124 | NTNCWS | Nampa | 700 | Canyon County |
| Sourdough Point | ID1090129 | CWS | Sandpoint | 178 | Bonner County |
| South Fork Elementary School | ID7330071 | NTNCWS | Rexburg | 359 | Madison County |
| South Lapwai | 101600003 | CWS | Lapwai | 235 | Nez Perce County |
| South Park Water And Sewer | ID6060078 | CWS | Shelley | 125 | Bingham County |
| South River Water Assn | ID1280155 | CWS | Post Falls | 150 | Kootenai County |
| Southfork Landing Inc | ID4080117 | CWS | Garden Valley | 25 | Boise County |
| Southshore Water | ID3140254 | CWS | Eagle | 60 | Canyon County |
| Southside Elementary School | ID1090130 | NTNCWS | Sandpoint | 200 | Bonner County |
| Southside Water And Sewer Dist | ID1090131 | CWS | Sandpoint | 615 | Bonner County |
| Southview Terrace Park | ID1280236 | CWS | Athol | 250 | Kootenai County |
| Space Acres Water Users Assn | ID6030050 | CWS | Pocatello | 29 | Bannock County |
| Spirit Bend Water Assn | ID1280175 | CWS | Athol | 145 | Kootenai County |
| Spirit Lake City Of | ID1280177 | CWS | Spirit Lake | 2,825 | Kootenai County |
| Spirit Lake Industrial Park | ID1090212 | CWS | Wellton | 90 | Bonner County |
| Splendid Acres Water Assn | ID4200048 | CWS | Mountain Home | 91 | Elmore County |
| Sportsmans River Resort | ID5420054 | CWS | Hagerman | 50 | Twin Falls County |
| Spring Creek Terraces | ID5160041 | CWS | Burley | 70 | Cassia County |
| Springdale Acres | ID5160056 | CWS | Burley | 35 | Cassia County |
| Springfield City Of | ID6060080 | CWS | Springfield | 35 | Bingham County |
| St Charles City Of | ID6040024 | CWS | St. Charles | 191 | Bear Lake County |
| St John Bosco Academy | ID2250140 | NTNCWS | Cottonwood | 160 | Idaho County |
| St Leon Ind Park | ID7100070 | NTNCWS | Idaho Falls | 75 | Bonneville County |
| St Maries City Of | ID1050024 | CWS | St Maries | 4,173 | Benewah County |
| Stanley Pond Inc | ID4010139 | CWS | Boise | 72 | Ada County |
| Stanley School | ID7190053 | NTNCWS | Challis | 25 | Custer County |
| Starting Line | ID7100100 | NTNCWS | Idaho Falls | 35 | Bonneville County |
| Starweather Estates | ID5070097 | CWS | Ketchum | 150 | Blaine County |
| State Line Village | ID1280182 | NTNCWS | Post Falls | 49 | Kootenai County |
| Stecher Mutual Water Company | ID3140175 | CWS | Caldwell | 62 | Canyon County |
| Stecher Water Users Assn | ID3140116 | CWS | Caldwell | 70 | Canyon County |
| Stepping Stones Estates | ID1280243 | CWS | Athol | 88 | Kootenai County |
| Stites City Of | ID2250060 | CWS | Stites | 253 | Idaho County |
| Stone Elementary School Dist 351 | ID6360009 | NTNCWS | Malad | 35 | Oneida County |
| Stoneridge Utilities | ID1090009 | CWS | Blanchard | 940 | Bonner County |
| Strawberry Mink Creek Water Assn | ID6210017 | CWS | Preston | 75 | Franklin County |
| Sugar City City Of | ID7330026 | CWS | Sugar City | 2,395 | Madison County |
| Summerwind Water Users | ID4200049 | CWS | Mountain Home | 192 | Elmore County |
| Sun Aire Estates | ID1280184 | CWS | Belleview | 98 | Kootenai County |
| Sun Glo Of Idaho North | ID7330027 | NTNCWS | Sugar City | 92 | Madison County |
| Sunbeam Water | ID6390007 | CWS | Rockland | 60 | Power County |
| Sunbrook Estates Div # 2 | ID7260079 | CWS | Rigby | 144 | Jefferson County |
| Sunlight Terrace | ID3140118 | CWS | Middleton | 234 | Canyon County |
| Sunny Acres | ID1400047 | CWS | Kellogg | 100 | Shoshone County |
| Sunnyridge 3 Water Corp | ID3140121 | CWS | Nampa | 240 | Canyon County |
| Sunnyridge I Subd | ID3140119 | CWS | Notus | 35 | Canyon County |
| Sunnyridge Property Owners | ID3140122 | CWS | Nampa | 53 | Canyon County |
| Sunnyridge Subd 2 | ID3140120 | CWS | Nampa | 34 | Canyon County |
| Sunnyside Park | ID2180004 | CWS | Lenore | 40 | Clearwater County |
| Sunnyside Park Utilities Inc | ID7100196 | NTNCWS | Idaho Falls | 100 | Bonneville County |
| Sunnyside Water Assn | ID1090132 | CWS | Sandpoint | 125 | Bonner County |
| Sunridge | ID3140264 | NTNCWS | Twin Falls | 30 | Canyon County |
| Sunrise Terrace Homeowners Assn | ID1090133 | CWS | Sagle | 55 | Bonner County |
| Sunset Heights Water District | ID7300050 | CWS | Salmon | 65 | Lemhi County |
| Sunset Mobile Home Park | ID5320009 | CWS | Hazelton | 55 | Lincoln County |
| Sunset Subd | ID6060082 | CWS | Blackfoot | 43 | Bingham County |
| Sunset Trailer Ranch | ID7100088 | CWS | Blackfoot | 150 | Bonneville County |
| Suntree Hollow Mobile Home Court | ID5070049 | CWS | San Diego | 60 | Blaine County |
| Swan Lake Culinary Water Company | ID6030052 | CWS | Swan Lake | 29 | Bannock County |
| Swan Shores Ii | ID1090223 | CWS | Sandpoint | 140 | Bonner County |
| Swan Valley Elementary | ID7100042 | NTNCWS | Irwin | 82 | Bonneville County |
| Sweet Montour School | ID3230021 | NTNCWS | Emmett | 50 | Gem County |
| Symms Fruit Ranch Inc | ID3140187 | NTNCWS | Caldwell | 88 | Canyon County |
| Syngenta Seeds Inc | ID3140186 | NTNCWS | Nampa | 80 | Canyon County |
| Syringa Heights Water Dist | ID1090136 | CWS | Sandpoint | 550 | Bonner County |
| Syringa Park Subd | ID7330028 | CWS | Rexburg | 35 | Madison County |
| Syringa Water And Sewer | ID1280271 | CWS | Coeur D Alene | 203 | Kootenai County |
| Tamarack Bay Condominiums | ID4430046 | NTNCWS | Mccall | 130 | Valley County |
| Tamarack Estates Water Assn | ID1090139 | CWS | Sagle | 69 | Bonner County |
| Tamarack Mills Llc Dba Evergreen Forests | ID3020035 | NTNCWS | New Meadows | 80 | Adams County |
| Tamarack Resort Association Inc | ID4430100 | NTNCWS | Donnelly | 400 | Valley County |
| Tammany Alternative Center | ID2350027 | NTNCWS | Lewiston | 80 | Nez Perce County |
| Taylor Mountain Water And Sewer District | ID7100023 | CWS | Idaho Falls | 600 | Bonneville County |
| Telford Academy | ID7100128 | NTNCWS | Idaho Falls | 40 | Bonneville County |
| Telford Park | ID7100175 | NTNCWS | Idaho Falls | 150 | Bonneville County |
| Tenicor | ID2290054 | NTNCWS | Moscow | 40 | Latah County |
| Tensed City Of | ID1050026 | CWS | Tensed | 146 | Benewah County |
| Terrace Lakes Water Company | ID4080047 | CWS | New Plymouth | 475 | Boise County |
| Terrace Water Corp Inc | ID4010036 | CWS | Meridian | 84 | Ada County |
| Terreton Elementary High Als Schools | ID7260038 | NTNCWS | Terreton | 640 | Jefferson County |
| Teton City Of | ID7220072 | CWS | Teton | 735 | Fremont County |
| Teton Reserve Subdivision & Golf Course | ID7410029 | CWS | Victor | 62 | Teton County |
| Teton Springs Water And Sewer Company | ID7410033 | CWS | Driggs | 924 | Teton County |
| Tetonia City Of | ID7410012 | CWS | Tetonia | 409 | Teton County |
| The Arthur Companies | ID6060113 | NTNCWS | Blackfoot | 56 | Bingham County |
| The Centre At Rainey Creek | ID7100226 | CWS | Swan Valley | 129 | Bonneville County |
| The Learning Academy | ID7410042 | NTNCWS | Driggs | 50 | Teton County |
| The Occasions Group | ID7330055 | NTNCWS | Rexburg | 202 | Madison County |
| The Valley Club | ID5070085 | CWS | Ketchum | 135 | Blaine County |
| Third Addition Water Assn | ID1280165 | CWS | Coeur D Alene | 97 | Kootenai County |
| Thompson Creek Mine | ID7190017 | NTNCWS | Challis | 190 | Custer County |
| Three Mile Water Dist | ID1110028 | CWS | Bonners Ferry | 2,652 | Boundary County |
| Thunder Canyon Estates Homeowners Assoc | ID6030068 | CWS | Lava Hot Springs | 25 | Bannock County |
| Timberline High School | ID2180034 | NTNCWS | Weippe | 200 | Clearwater County |
| Timberstone Hoa | ID3140220 | CWS | Meridian | 170 | Canyon County |
| Titan Machinery | ID7100144 | NTNCWS | Idaho Falls | 26 | Bonneville County |
| Tlk | ID4200105 | NTNCWS | Mountain Home | 75 | Elmore County |
| Town And Country Mobile Home Park | ID6060085 | CWS | Sugar City | 85 | Bingham County |
| Town And Country Water Users Assn | ID4200052 | CWS | Mountain Home | 86 | Elmore County |
| Township Park Water Company | ID7100155 | CWS | Idaho Falls | 43 | Bonneville County |
| Trails End Estates | ID1280310 | CWS | Post Falls | 49 | Kootenai County |
| Travel America Trailer Park Sandpoint | ID1090145 | CWS | Sagle | 318 | Bonner County |
| Travelers Oasis | ID5270013 | NTNCWS | Eden | 75 | Jerome County |
| Tri Pro Cedar Sawmill | ID1090034 | NTNCWS | Sandpoint | 50 | Bonner County |
| Trinity Estates Water Users Assn | ID4200053 | CWS | Mountain Home | 250 | Elmore County |
| Trout Creek Culinary Water Inc | ID6150019 | CWS | Grace | 90 | Caribou County |
| Trow Creek Water Assn | ID1110029 | CWS | Bonners Ferry | 98 | Boundary County |
| Troy City Of | ID2290041 | CWS | Troy | 850 | Latah County |
| Troy Hoffman Water Corp | ID1280096 | CWS | Coeur D'Alene | 367 | Kootenai County |
| True West Beef | ID5270038 | NTNCWS | Boise | 550 | Jerome County |
| Twenty Mile Creek Water Assn | ID1110030 | CWS | Bonners Ferry | 225 | Boundary County |
| Twin Bridges Subd | ID3140125 | CWS | Nampa | 28 | Canyon County |
| Twin Falls City County Airport | ID5420057 | NTNCWS | Twin Falls | 410 | Twin Falls County |
| Twin Lakes Service Area | ID1280099 | CWS | Rathdrum | 2,023 | Kootenai County |
| Twin Pines Mobile Park | ID6030026 | CWS | Pocatello | 86 | Bannock County |
| Tyhee And S And N Estates Water Assn | ID6030044 | CWS | Pocatello | 300 | Bannock County |
| Tyhee Elementary School | ID6030055 | NTNCWS | Pocatello | 675 | Bannock County |
| Ucon City Of | ID7100094 | CWS | Ucon | 1,161 | Bonneville County |
| Unit 3 Water Assn | ID5270025 | CWS | Jerome | 350 | Jerome County |
| Upper Twin Lakes Water Company Inc | ID1280194 | CWS | Rathdrum | 227 | Kootenai County |
| Ups - Rexburg (Idrex) | ID7330076 | NTNCWS | Boise | 80 | Madison County |
| Usace Albeni Falls Dam | ID1090025 | NTNCWS | Oldtown | 40 | Bonner County |
| Usace Dworshak Pwr Hse View Pt | ID2180009 | NTNCWS | Ahsahka | 50 | Clearwater County |
| Usda Ars | ID5420061 | NTNCWS | Kimberly | 46 | Twin Falls County |
| Usda Germ Plasm | ID6060097 | NTNCWS | Aberdeen | 30 | Bingham County |
| Usfs Lowman Ranger Station Pc | ID4080077 | NTNCWS | Lowman | 35 | Boise County |
| Usfw Dworshak National Fish Hatchery | ID2180035 | NTNCWS | Ahsahka | 25 | Clearwater County |
| Valley Co Op Water Assn | ID1280196 | CWS | Medimont | 52 | Kootenai County |
| Valley Green | ID1280195 | CWS | Rathdrum | 135 | Kootenai County |
| Valley Hi Estates | ID4080051 | CWS | Garden Valley | 140 | Boise County |
| Valley School | ID5270020 | NTNCWS | Hazelton | 640 | Jerome County |
| Valley View Country School | ID5420087 | NTNCWS | Buhl | 295 | Twin Falls County |
| Valley View Estates | ID6030057 | CWS | Pocatello | 74 | Bannock County |
| Valley View Heights | ID7300057 | CWS | Salmon | 65 | Lemhi County |
| Valley View Subdivision | ID7220156 | NTNCWS | Island Park | 90 | Fremont County |
| Valley View Water | ID3140130 | CWS | Notus | 57 | Canyon County |
| Valley View Water And Sewer District | ID2250065 | CWS | Kamiah | 70 | Idaho County |
| Valley View Water Assn | ID6150022 | CWS | Soda Springs | 35 | Caribou County |
| Valley Vista Estates | ID7410036 | CWS | Jackson | 192 | Teton County |
| Valley Wide Co-Op - Wendell | ID5240034 | NTNCWS | Nampa | 85 | Gooding County |
| Vanal Heights Sweet Water | ID3140132 | CWS | Caldwell | 45 | Canyon County |
| Vanal Heights Well Assn | ID3140133 | CWS | Notus | 48 | Canyon County |
| Verde Hills Water Users Assn Inc | ID3140134 | CWS | Nampa | 95 | Canyon County |
| Victor City Of | ID7410013 | CWS | Victor | 2,361 | Teton County |
| View Point Subdivision | ID2350042 | CWS | Lewiston | 56 | Nez Perce County |
| View Water Development Company | ID5160043 | CWS | Burley | 112 | Cassia County |
| Village 21 Water Dist | ID2250066 | CWS | Kamiah | 25 | Idaho County |
| Viola Water And Sewer Dist | ID2290046 | CWS | Viola | 128 | Latah County |
| Vp, Inc | ID1090195 | CWS | Sandpoint | 349 | Bonner County |
| Wada Farms Potatoes Inc | ID6060098 | NTNCWS | Pingree | 190 | Bingham County |
| Waha Glen Water Dist | ID2350030 | CWS | Lewiston | 100 | Nez Perce County |
| Walking Horse Ranch Estates | ID1280350 | CWS | Coeur D Alene | 95 | Kootenai County |
| Wapello Elementary School | ID6060088 | NTNCWS | Blackfoot | 253 | Bingham County |
| Watco Company | ID5160013 | NTNCWS | Burley | 120 | Cassia County |
| Waterford Estates | ID1280292 | CWS | Athol | 108 | Kootenai County |
| Wayside Estates | ID5340022 | CWS | Heyburn | 50 | Minidoka County |
| Weippe City Of | ID2180037 | CWS | Weippe | 438 | Clearwater County |
| Weir Gulch Water Assn | ID1400082 | CWS | Pinehurst | 80 | Shoshone County |
| Wells Bench Water And Road | ID2180038 | CWS | Orofino | 28 | Clearwater County |
| Wendell City Of | ID5240028 | CWS | Wendell | 3,000 | Gooding County |
| West Bonner Water Dist 1 | ID1090151 | CWS | Old Town | 545 | Bonner County |
| West Canyon Elementary School | ID3140136 | NTNCWS | Notus | 467 | Canyon County |
| West Meadows Estates | ID4010158 | CWS | Boise | 270 | Ada County |
| West Point | ID5240044 | NTNCWS | Wendell | 65 | Gooding County |
| West River | ID3140265 | CWS | Notus | 65 | Canyon County |
| West Seasons Acres Hoa | ID1280286 | CWS | Spirit Lake | 31 | Kootenai County |
| Western States Equipment | ID2350020 | NTNCWS | Lewiston | 35 | Nez Perce County |
| Weston City Of | ID6210019 | CWS | Weston | 490 | Franklin County |
| Westview Shervik Subd | ID3140137 | CWS | Nampa | 78 | Canyon County |
| Westwood Water Assn | ID7100148 | CWS | Idaho Falls | 41 | Bonneville County |
| Whiskey Creek Water Users | ID6150024 | CWS | Grace | 35 | Caribou County |
| White Bird City Of | ID2250068 | CWS | White Bird | 125 | Idaho County |
| Whitewater Subd | ID6030058 | CWS | Pocatello | 106 | Bannock County |
| Whitney Nashville Water Works | ID6210020 | CWS | Preston | 403 | Franklin County |
| Wild Meadows I Subd | ID1090155 | CWS | Spirit Lake | 27 | Bonner County |
| Wilder City Of | ID3140138 | CWS | Wilder | 1,690 | Canyon County |
| Wilderness Ranch Owners Association Inc | ID4080055 | CWS | Boise | 525 | Boise County |
| Wildhorse Ridge Subd | ID6030081 | CWS | Pocatello | 85 | Bannock County |
| Wildrose Estates | ID3140139 | CWS | Caldwell | 40 | Canyon County |
| Willowbrook Estates Property Owners | ID4010160 | CWS | Eagle | 100 | Ada County |
| Willowtree Estates Homeowner Association | ID4010253 | CWS | Meridain | 50 | Ada County |
| Winchester Water Dept | ID2310007 | CWS | Winchester | 400 | Lewis County |
| Winder Water System | ID6210021 | CWS | Preston | 20 | Franklin County |
| Woodenhills Water Works | ID5070093 | CWS | Ketchum | 62 | Blaine County |
| Woodgrain Millwork | ID3140251 | NTNCWS | Nampa | 200 | Canyon County |
| Woodland Furniture Llc | ID7100074 | NTNCWS | Idaho Falls | 30 | Bonneville County |
| Woodland Heights Mhp | ID2290043 | CWS | Port Orchard | 60 | Latah County |
| Woodland Heights Water Assn #1 | ID7100107 | CWS | Idaho Falls | 54 | Bonneville County |
| Woodland Shores Water And Sewer Assn | ID1280203 | CWS | Coeur D Alene | 210 | Kootenai County |
| Woodview Acres Property Owners | ID3140141 | CWS | Caldwell | 245 | Canyon County |
| Woodville | ID6060089 | CWS | Shelley | 225 | Bingham County |
| Worley City Of | ID1280206 | CWS | Worley | 591 | Kootenai County |
| Wymosa Water Assn Inc | ID4010161 | CWS | Boise | 280 | Ada County |
| Y Mobile Home Park | ID2290050 | CWS | Potlatch | 52 | Latah County |
| Yellow Pine Water Users Inc | ID4430059 | CWS | Yellow Pine | 72 | Valley County |
| Yellowstone Plastics | ID7100188 | NTNCWS | Idaho Falls | 165 | Bonneville County |
| Zoroco Packaging Inc | ID3140258 | NTNCWS | Notus | 60 | Canyon County |