Groundwater Rule (GWR) violations in Idaho
107 active public water systems in Idaho had a Groundwater Rule (GWR) violation in the past three years, 95 of them in the latest quarter of EPA's data. What Groundwater Rule (GWR) is and why it matters.
Systems with a Groundwater Rule (GWR) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Preston City of Franklin County |
5,591 | 5 | 1 | |
|
Idoc Sbx Complex Ada County |
3,309 | 2 | 2 | |
|
Bellevue City of Blaine County |
2,747 | 4 | 1 | |
|
Orofino City of Clearwater County |
2,459 | 1 | 1 | |
|
Hansen City of Twin Falls County |
1,200 | 3 | 3 | |
|
Itd Huetter Poe Kootenai County |
1,200 | 2 | 1 | |
|
Plummer City of Benewah County |
1,034 | 4 | 0 | |
|
Idpr Lucky Peak SP Discovery Unit Ada County |
1,000 | 4 | 0 | |
|
Speedy's Truck Stop Lupton · County |
926 | 3 | 1 | |
|
Lds Church Farmway Canyon County |
784 | 2 | 1 | |
|
Idpr Lucky Peak SP Spring Shores Boise County |
780 | 1 | 1 | |
|
Idaho National Guard Ortc Facility Ada County |
600 | 2 | 1 | |
|
Worley City of Kootenai County |
591 | 3 | 2 | |
|
Meadows at West Mountain Valley County |
550 | 2 | 2 | |
|
Rustic Acres Mobile Home Park Ada County |
540 | 3 | 2 | |
|
Jackson Food Store 178 Canyon County |
500 | 3 | 1 | |
|
Oakley Valley Water Corporation Cassia County |
500 | 5 | 2 | |
|
Shadow Butte Elementary School Gem County |
485 | 6 | 3 | |
|
Harrison City of Kootenai County |
456 | 1 | 1 | |
|
Idoc Mountain View Transformation Center Ada County |
456 | 4 | 1 | |
|
Fish Haven Pipeline Company Bear Lake County |
400 | 1 | 1 | |
|
Winchester Water Dept Lewis County |
400 | 2 | 1 | |
|
South Fork Elementary School Madison County |
359 | 2 | 2 | |
|
Cedar Butte Subdivision Madison County |
300 | 2 | 1 | |
|
Fir Grove Estates Valley County |
270 | 3 | 2 | |
|
Mission Creek Water Assn Boundary County |
263 | 5 | 2 | |
|
Country Life Estates Bonneville County |
250 | 5 | 2 | |
|
Shotgun Cherokee Subd 5 Fremont County |
245 | 5 | 2 | |
|
Hollister City of Twin Falls County |
220 | 4 | 0 | |
|
Extra Mile #196 Canyon County |
200 | 1 | 0 | |
|
Goose Bay Estates Fremont County |
184 | 4 | 3 | |
|
Banida Water and Sewer Dist Franklin County |
180 | 8 | 3 | |
|
Cougar Ridge Water & Sewer Nez Perce County |
173 | 1 | 0 | |
|
Lds Church Sweet Gem County |
138 | 1 | 1 | |
|
Cedar Springs Community Water Bonner County |
130 | 7 | 5 | |
|
Murtaugh City of Twin Falls County |
130 | 4 | 1 | |
|
Lighthouse Montessori School Ammon · Bonneville County |
125 | 3 | 2 | |
|
Linda Vista Mobile Home Park Ada County |
125 | 2 | 2 | |
|
Preston Eastside Water CO Franklin County |
120 | 10 | 3 | |
|
Alberts Landing Shoshone County |
100 | 4 | 2 | |
|
Green Canyon Hot Springs Madison County |
100 | 2 | 2 | |
|
Elk Valley Resort Elmore County |
100 | 1 | 1 | |
|
Kaniksu Shores Estates Bonner County |
93 | 2 | 1 | |
|
Riverside Estates Bingham County |
90 | 4 | 3 | |
|
Spirit Lake Industrial Park Bonner County |
90 | 2 | 1 | |
|
Trinity View Resort Elmore County |
90 | 4 | 3 | |
|
Valley View Subdivision Fremont County |
90 | 6 | 3 | |
|
Camp Sawtooth Presbyterian Blaine County |
85 | 4 | 2 | |
|
Idle Wheels MHP Cat LLC Bingham County |
85 | 4 | 3 | |
|
Camp Perkins Lutheran Outdoor Ministries Blaine County |
80 | 2 | 2 |
About this data
A system is counted once if any of its violations in the past three years involved Groundwater Rule (GWR), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Groundwater Rule (GWR) 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.