Nitrate violations in Idaho
221 active public water systems in Idaho had a Nitrate violation in the past three years, 9 of them still unresolved. What Nitrate is and why it matters.
Systems with a Nitrate violation
Unresolved first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Lds Church Sunnyridge Canyon County |
539 | 1 | 0 | |
|
Banida Water and Sewer Dist Franklin County |
180 | 8 | 3 | |
|
Crouch Community Church Crouch · Boise County |
160 | 2 | 0 | |
|
Whitewater Subd Bannock County |
106 | 3 | 1 | |
|
Calvary Chapel of Garden Valley Boise County |
100 | 2 | 0 | |
|
S&s Twin Falls County |
75 | 2 | 0 | |
|
Powderhorn Water Assn Kootenai County |
50 | 3 | 2 | |
|
Anderson Circle Water Corp Ada County |
40 | 1 | 0 | |
|
Good 2 GO Star Stop Twin Falls County |
25 | 3 | 1 | |
|
Twin Falls City of Twin Falls County |
56,121 | 5 | 0 | |
|
Ammon City of Bonneville County |
17,338 | 1 | 0 | |
|
Capitol Water Corp Ada County |
9,000 | 5 | 1 | |
|
Grangeville Water Dept Idaho County |
3,151 | 4 | 0 | |
|
Carey City of Blaine County |
993 | 1 | 0 | |
|
Cottonwood Water Dept Idaho County |
977 | 2 | 0 | |
|
Lds Church Amity Locust Grove Meridian · Ada County |
840 | 2 | 0 | |
|
Bogus Basin Mtn Resort Boise County |
750 | 4 | 1 | |
|
Sorrento Lactalis Canyon County |
700 | 5 | 0 | |
|
Tyhee Elementary School Bannock County |
675 | 3 | 2 | |
|
Melba City of Canyon County |
648 | 4 | 1 | |
|
Juliaetta City of Latah County |
624 | 4 | 1 | |
|
Blm Joe T Fallini Custer County |
540 | 2 | 1 | |
|
Bia North Idaho Lapwai · County |
490 | 5 | 0 | |
|
Red Pheasant Water Company LLC Nez Perce County |
480 | 6 | 2 | |
|
Grand View, City of Owyhee County |
452 | 4 | 2 | |
|
Itd Cotterell P O E Cassia County |
450 | 2 | 0 | |
|
Itd Juniper Rest Area Oneida County |
450 | 2 | 0 | |
|
Lds Wapello Church Bingham County |
436 | 1 | 0 | |
|
Clifton City of Franklin County |
413 | 5 | 2 | |
|
Tamarack Resort Association INC Valley County |
400 | 3 | 1 | |
|
Chase Crossing Canyon County |
306 | 2 | 0 | |
|
Lds Priest River Bonner County |
304 | 4 | 1 | |
|
Lds South Maple Grove Stake Center Boise · Ada County |
300 | 3 | 1 | |
|
McCain Foods Cassia County |
267 | 3 | 0 | |
|
Bennington Water System Bear Lake County |
250 | 9 | 3 | |
|
Woodview Acres Property Owners Canyon County |
245 | 1 | 0 | |
|
South Lapwai Lapwai · County |
235 | 1 | 0 | |
|
Jerome Country Club Jerome County |
225 | 3 | 1 | |
|
Givens Hot Springs Owyhee County |
207 | 3 | 0 | |
|
Camp Mivoden Kootenai County |
200 | 2 | 0 | |
|
Shortstop INC Canyon County |
200 | 2 | 0 | |
|
Siscra Valley County |
200 | 2 | 0 | |
|
Calvary Chapel of Emmett Emmett · Gem County |
192 | 7 | 1 | |
|
Leisure Acres Trailer Court Shoshone County |
180 | 6 | 1 | |
|
Riverence Provisions, LLC Gooding County |
180 | 2 | 1 | |
|
Owyhee County Fairgrounds Owyhee County |
178 | 2 | 0 | |
|
Lds Westmond Bonner County |
177 | 3 | 1 | |
|
Caldwell Christian Church Canyon County |
175 | 2 | 0 | |
|
Meadows Mobile Park Elmore County |
175 | 3 | 1 | |
|
Twinlow Residents Deep Well Kootenai County |
156 | 4 | 1 |
About this data
A system is counted once if any of its violations in the past three years involved Nitrate, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Nitrate alone.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Idaho records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.