Chlorine (MRDL) violations in Idaho
101 active public water systems in Idaho had a Chlorine (MRDL) violation in the past three years, 19 of them in the latest quarter of EPA's data. What Chlorine (MRDL) is and why it matters.
Systems with a Chlorine (MRDL) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Eagle, City of (western Zone) Ada County |
6,108 | 2 | 0 | |
|
Preston City of Franklin County |
5,591 | 5 | 1 | |
|
Paul City of Minidoka County |
1,195 | 1 | 0 | |
|
Idpr Lucky Peak SP Discovery Unit Ada County |
1,000 | 4 | 0 | |
|
Challis City of Custer County |
900 | 5 | 1 | |
|
Lamb Weston Inc. Power County |
600 | 3 | 2 | |
|
Cambridge City of Washington County |
335 | 4 | 0 | |
|
Elk City Water and Sewer Assn Idaho County |
320 | 5 | 0 | |
|
Paradise Estates Water Corp Ada County |
273 | 4 | 1 | |
|
Hollister City of Twin Falls County |
220 | 4 | 0 | |
|
YMCA Horsethief Camp Cascade · Valley County |
220 | 5 | 1 | |
|
Meadows Mobile Park Elmore County |
175 | 3 | 1 | |
|
Drake Subd Canyon County |
150 | 9 | 3 | |
|
Minidoka City of Minidoka County |
120 | 4 | 0 | |
|
Bear Lake West Bear Lake County |
100 | 1 | 0 | |
|
Strawberry Mink Creek Water Assn Franklin County |
75 | 5 | 1 | |
|
Clear Lake Ranch P U D Gooding County |
54 | 6 | 2 | |
|
Conkling Marina & Resort Kootenai County |
50 | 3 | 0 | |
|
Pines RV Park Harvard · Latah County |
10 | 3 | 0 | |
|
Pocatello City of Pocatello · Bannock County |
58,231 | 2 | 0 | |
|
Twin Falls City of Twin Falls County |
56,121 | 5 | 0 | |
|
Star Sewer and Water Dist Water System Ada County |
14,000 | 1 | 0 | |
|
Mountain Home Air Force Base Elmore County |
7,500 | 4 | 0 | |
|
Rupert City of Minidoka County |
5,796 | 2 | 1 | |
|
Ketchum City of Blaine County |
3,555 | 3 | 0 | |
|
Schweitzer Mountain Resort Bonner County |
3,301 | 4 | 0 | |
|
Coeur D'alene Casino Worley · County |
3,250 | 2 | 0 | |
|
Fort Hall Fort Hall · County |
2,850 | 8 | 2 | |
|
Glenns Ferry City of Elmore County |
1,282 | 3 | 0 | |
|
Ashton City of Fremont County |
1,129 | 3 | 1 | |
|
Plummer City of Benewah County |
1,034 | 4 | 0 | |
|
Gem State Spirit Lake East Kootenai County |
843 | 2 | 0 | |
|
Oakley City of Cassia County |
821 | 6 | 4 | |
|
McCammon City of Bannock County |
800 | 2 | 1 | |
|
Clark Fork City of Bonner County |
730 | 2 | 0 | |
|
Melba City of Canyon County |
648 | 4 | 1 | |
|
Downey City of Bannock County |
586 | 1 | 0 | |
|
Kingston Water Dist 1 Shoshone County |
585 | 2 | 0 | |
|
West Bonner Water Dist 1 Bonner County |
545 | 2 | 0 | |
|
Oakley Valley Water Corporation Cassia County |
500 | 5 | 2 | |
|
Shadow Butte Elementary School Gem County |
485 | 6 | 3 | |
|
Red Pheasant Water Company LLC Nez Perce County |
480 | 6 | 2 | |
|
Terrace Lakes Water Company Boise County |
475 | 6 | 1 | |
|
Pierce City of Clearwater County |
467 | 4 | 1 | |
|
Amalgamated Sugar Twin Falls Twin Falls County |
460 | 2 | 0 | |
|
Cave Bay Community System Kootenai County |
458 | 6 | 1 | |
|
Idoc Mountain View Transformation Center Ada County |
456 | 4 | 1 | |
|
Malta Schools Cassia County |
440 | 4 | 1 | |
|
Jerome Cheese Company Jerome County |
400 | 2 | 1 | |
|
Hulen Meadows Water Company Blaine County |
390 | 1 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Chlorine (MRDL), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Chlorine (MRDL) 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.