Fluoride violations in Idaho
11 active public water systems in Idaho had a Fluoride violation in the past three years, 1 of them in the latest quarter of EPA's data. What Fluoride is and why it matters.
Systems with a Fluoride violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Drake Subd Canyon County |
150 | 9 | 3 | |
|
Lapwai City of Nez Perce County |
325 | 4 | 0 | |
|
Mellen Subd Water Dist Elmore County |
250 | 6 | 1 | |
|
Kanaka Rapids Ranch Water System INC Twin Falls County |
240 | 5 | 1 | |
|
Banida Water and Sewer Dist Franklin County |
180 | 8 | 3 | |
|
Murtaugh City of Twin Falls County |
130 | 4 | 1 | |
|
Purple Sage Community Canyon County |
98 | 3 | 0 | |
|
King Hill Domestic Water and Sewer Elmore County |
87 | 8 | 1 | |
|
Mountain Sage Elmore County |
65 | 9 | 2 | |
|
Stecher Mutual Water Company Canyon County |
62 | 1 | 0 | |
|
Lakeridge Second Subd Canyon County |
50 | 2 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Fluoride, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Fluoride 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.