Lead and Copper Rule (LCR) violations in Idaho
229 active public water systems in Idaho had a Lead and Copper Rule (LCR) violation in the past three years, 229 of them in the latest quarter of EPA's data. What Lead and Copper Rule (LCR) is and why it matters.
Systems with a Lead and Copper Rule (LCR) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Caldwell City of Canyon County |
78,740 | 1 | 1 | |
|
Rathdrum City of Kootenai County |
10,358 | 2 | 1 | |
|
Preston City of Franklin County |
5,591 | 5 | 1 | |
|
McCall City of Valley County |
4,423 | 5 | 1 | |
|
Gooding City of Gooding County |
3,706 | 1 | 1 | |
|
Idoc Sbx Complex Ada County |
3,309 | 2 | 2 | |
|
Salmon City of Lemhi County |
3,158 | 2 | 1 | |
|
Three Mile Water Dist Boundary County |
2,652 | 2 | 2 | |
|
Idoc Idaho State Correctional Center Ada County |
2,204 | 3 | 1 | |
|
Dry Creek Water Company LLC Ada County |
1,658 | 1 | 1 | |
|
New Plymouth City of Payette County |
1,600 | 1 | 1 | |
|
Oden Water Assn INC Bonner County |
1,524 | 1 | 1 | |
|
Kamiah City of Lewis County |
1,495 | 6 | 1 | |
|
Fairview Water Dist Franklin County |
1,300 | 3 | 1 | |
|
Hansen City of Twin Falls County |
1,200 | 3 | 3 | |
|
Caldwell Housing Authority Canyon County |
1,100 | 1 | 1 | |
|
Challis City of Custer County |
900 | 5 | 1 | |
|
Kootenai County Water Dist 1 Kootenai County |
843 | 6 | 3 | |
|
Oakley City of Cassia County |
821 | 6 | 4 | |
|
Bogus Basin Mtn Resort Boise County |
750 | 4 | 1 | |
|
Snake River High School Bingham County |
745 | 2 | 1 | |
|
Tyhee Elementary School Bannock County |
675 | 3 | 2 | |
|
Melba City of Canyon County |
648 | 4 | 1 | |
|
Valley School Jerome County |
640 | 3 | 2 | |
|
Juliaetta City of Latah County |
624 | 4 | 1 | |
|
Idaho National Guard Ortc Facility Ada County |
600 | 2 | 1 | |
|
Lamb Weston Inc. Power County |
600 | 3 | 2 | |
|
Paris City of Bear Lake County |
540 | 2 | 1 | |
|
Notus City of Canyon County |
539 | 1 | 1 | |
|
Idaho City Water Dept Boise County |
531 | 1 | 1 | |
|
Wilderness Ranch Owners Association INC Boise County |
525 | 3 | 1 | |
|
Richfield City of Lincoln County |
501 | 1 | 1 | |
|
Basic American Foods Blackfoot Bingham County |
500 | 2 | 2 | |
|
Oakley Valley Water Corporation Cassia County |
500 | 5 | 2 | |
|
American Heritage Charter School Idaho Falls · Bonneville County |
490 | 1 | 1 | |
|
Shadow Butte Elementary School Gem County |
485 | 6 | 3 | |
|
Red Pheasant Water Company LLC Nez Perce County |
480 | 6 | 2 | |
|
Pierce City of Clearwater County |
467 | 4 | 1 | |
|
Morning View Water Company Jefferson County |
459 | 4 | 2 | |
|
Cave Bay Community System Kootenai County |
458 | 6 | 1 | |
|
Grand View, City of Owyhee County |
452 | 4 | 2 | |
|
Dietrich Water System Lincoln County |
450 | 3 | 2 | |
|
Fairfield City of Camas County |
441 | 3 | 3 | |
|
Malta Schools Cassia County |
440 | 4 | 1 | |
|
Tamarack Resort Association INC Valley County |
400 | 3 | 1 | |
|
Pine Ridge Water and Sewer Dist Idaho County |
390 | 4 | 1 | |
|
M and T Water and Sewer Dist Jefferson County |
358 | 1 | 1 | |
|
Bancroft City of Caribou County |
350 | 1 | 1 | |
|
Belle Aire Acres 2 Canyon County |
350 | 1 | 1 | |
|
Groveland Elementary School Dist 55 Bingham County |
350 | 2 | 2 |
About this data
A system is counted once if any of its violations in the past three years involved Lead and Copper Rule (LCR), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Lead and Copper Rule (LCR) 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.