Selenium violations in Idaho
19 active public water systems in Idaho had a Selenium violation in the past three years, 1 of them in the latest quarter of EPA's data. What Selenium is and why it matters.
Systems with a Selenium violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Drake Subd Canyon County |
150 | 9 | 2 | |
|
Lewiston City of Nez Perce County |
15,001 | 3 | 0 | |
|
Kamiah City of Lewis County |
1,495 | 6 | 1 | |
|
Sorrento Lactalis Canyon County |
700 | 5 | 0 | |
|
Shadow Butte Elementary School Gem County |
485 | 6 | 3 | |
|
Lapwai City of Nez Perce County |
325 | 4 | 0 | |
|
Mellen Subd Water Dist Elmore County |
250 | 6 | 1 | |
|
Calvary Chapel of Emmett Emmett · Gem County |
192 | 7 | 1 | |
|
Banida Water and Sewer Dist Franklin County |
180 | 8 | 3 | |
|
White Bird City of Idaho County |
125 | 6 | 1 | |
|
Perpetua Resources Valley County |
120 | 6 | 1 | |
|
Pleasant View Manor Canyon County |
100 | 5 | 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 | |
|
Gannett Homeowners Assn Blaine County |
60 | 6 | 2 | |
|
Lakeridge Second Subd Canyon County |
50 | 2 | 0 | |
|
Idfg Salmon Region Lemhi County |
45 | 5 | 1 | |
|
HK Contractors Bonneville County |
30 | 2 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Selenium, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Selenium 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.