Lead and Copper Rule (LCR) violations in California
404 active public water systems in California had a Lead and Copper Rule (LCR) violation in the past three years, 404 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 |
|---|---|---|---|---|
|
Kings River Point Fresno County |
36 | 2 | 2 | |
|
Maze Blvd Mobilehome Park Stanislaus County |
36 | 1 | 1 | |
|
Cold Springs Subdivision Cold Springs Rancheria · County |
35 | 8 | 3 | |
|
Oku Incorporated San Mateo County |
35 | 3 | 2 | |
|
Rivers End Trailer Park Los Angeles County |
35 | 2 | 2 | |
|
Sterling Industrial Stanislaus County |
35 | 1 | 1 | |
|
The River Community Los Angeles County |
35 | 2 | 2 | |
|
Two Twenty Four Mobile Home PK Madera County |
35 | 3 | 2 | |
|
Rancho Colorado WS Tehama County |
34 | 2 | 2 | |
|
Sonoma County Pub Works-Central Landfill Sonoma County |
34 | 1 | 1 | |
|
Lincoln Chan-Home Ranch Sacramento County |
33 | 1 | 1 | |
|
New Camaldoli Hermitage WS Monterey County |
33 | 1 | 1 | |
|
Colonia Santa Maria Contra Costa County |
32 | 2 | 2 | |
|
Foothill Mutual Water Company Santa Clara County |
32 | 3 | 2 | |
|
Monterey Dunes Mwa Monterey County |
32 | 1 | 1 | |
|
South Kern Mutual Water Company Kern County |
32 | 4 | 1 | |
|
Warner Springs Ranch Resort LLC San Diego County |
32 | 2 | 1 | |
|
Soults Pump & Equipment Company Tulare County |
31 | 1 | 1 | |
|
Wilcox Station Ranch Contra Costa County |
31 | 1 | 1 | |
|
Golden State Water Company South Shore Lake County |
30 | 2 | 1 | |
|
Higuera Apartments San Luis Obispo County |
30 | 3 | 2 | |
|
Larsen Ranch 39-40/water System San Joaquin County |
30 | 4 | 3 | |
|
Rainbow Farms Stanislaus County |
30 | 1 | 1 | |
|
Tds California Stanislaus County |
30 | 1 | 1 | |
|
Pentecostal WS Monterey County |
29 | 1 | 1 | |
|
Laguna Village RV Park Sacramento County |
28 | 1 | 1 | |
|
Thousand Pines Christian San Bernardino County |
28 | 1 | 1 | |
|
Jasmine Vineyards Cold Storage Delano · Kern County |
27 | 1 | 1 | |
|
McHenry Business Park Stanislaus County |
27 | 2 | 1 | |
|
Mitchell's Avenue E Mobile Home Park Los Angeles County |
27 | 2 | 1 | |
|
Pierpoint Springs Water Co. Tulare County |
27 | 1 | 1 | |
|
Albion Mutual Water Company Mendocino County |
26 | 1 | 1 | |
|
Harrington RD WS #07 Monterey County |
26 | 2 | 1 | |
|
River Road Mutual Water Company Stanislaus County |
26 | 1 | 1 | |
|
Antoinette Mutual Water CO Tehama County |
25 | 2 | 2 | |
|
Cal Trans Chp Chowchilla River Facility Merced County |
25 | 1 | 1 | |
|
Charity Way Water System Modesto · Stanislaus County |
25 | 1 | 1 | |
|
Covington Mill a Trinity County |
25 | 3 | 2 | |
|
Darwin Community Service District Inyo County |
25 | 2 | 1 | |
|
Etude Wines Napa County |
25 | 2 | 0 | |
|
Golden Valley Almonds Stanislaus County |
25 | 1 | 1 | |
|
Lone Star Dehydrator Fresno County |
25 | 2 | 2 | |
|
Monterey Mushrooms Hall RD Monterey County |
25 | 1 | 1 | |
|
Old Stage RD WS #21 Monterey County |
25 | 1 | 1 | |
|
Royal Carrizo HOA Riverside County |
25 | 1 | 1 | |
|
Santa Ynez Roblar Mobile Home Park Santa Barbara County |
25 | 4 | 0 | |
|
Sun Pacific Shippers Delano Delano · Kern County |
25 | 1 | 1 | |
|
Usfs-Valyermo Ranger Station Los Angeles County |
25 | 1 | 1 | |
|
Windflower Point Mutual Water Company Lake County |
25 | 1 | 1 | |
|
Redlands Colony Pipeline Association San Bernardino County |
21 | 1 | 1 |
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 California 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.