Interim Enhanced Surface Water Treatment Rule violations in Idaho
18 active public water systems in Idaho had a Interim Enhanced Surface Water Treatment Rule violation in the past three years, 6 of them in the latest quarter of EPA's data. What Interim Enhanced Surface Water Treatment Rule is and why it matters.
Systems with a Interim Enhanced Surface Water Treatment Rule violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Kamiah City of Lewis County |
1,495 | 6 | 1 | |
|
Challis City of Custer County |
900 | 5 | 1 | |
|
Troy City of Latah County |
850 | 4 | 0 | |
|
Elk City Water and Sewer Assn Idaho County |
320 | 5 | 0 | |
|
Ahsahka Water and Sewer Dist Clearwater County |
85 | 6 | 4 | |
|
Paradise Point Valley County |
80 | 2 | 0 | |
|
McCall City of Valley County |
4,423 | 5 | 1 | |
|
Glenns Ferry City of Elmore County |
1,282 | 3 | 0 | |
|
Franklin City of Franklin County |
1,000 | 2 | 0 | |
|
Bogus Basin Mtn Resort Boise County |
750 | 4 | 1 | |
|
Galena Mine Water System Shoshone County |
250 | 1 | 0 | |
|
YMCA Horsethief Camp Cascade · Valley County |
220 | 5 | 1 | |
|
Woodland Shores Water and Sewer Assn Kootenai County |
210 | 3 | 0 | |
|
Idpr Dworshak Freeman Creek CG (corps) Clearwater County |
100 | 4 | 1 | |
|
Trow Creek Water Assn Boundary County |
98 | 3 | 1 | |
|
Little Blacktail Ranch Water District Bonner County |
95 | 2 | 0 | |
|
Yellow Pine Water Users INC Valley County |
72 | 4 | 1 | |
|
Featherville Townsite Water Corp Elmore County |
60 | 4 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Interim Enhanced Surface Water Treatment Rule, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Interim Enhanced Surface Water Treatment Rule 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.