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 |
|---|---|---|---|---|
|
Yosemite Nps-Hodgdon Meadow Tuolumne County |
51 | 2 | 1 | |
|
Castle Mountain Mine San Bernardino County |
50 | 3 | 1 | |
|
Cinnabar Hills Golf Club Santa Clara County |
50 | 1 | 1 | |
|
Dhs Border Patrol I-8 Checkpoint San Diego County |
50 | 2 | 1 | |
|
Dolan RD Water System #2 Monterey County |
50 | 1 | 1 | |
|
Hkn LLC Santa Clara County |
50 | 1 | 1 | |
|
Inyo County Pwd Laws Town Inyo County |
50 | 3 | 3 | |
|
Madera Irrigation District Madera County |
50 | 4 | 2 | |
|
Montessori del Mar Learning Center Fort Bragg · Mendocino County |
50 | 1 | 1 | |
|
Netto AG Inc. Kings County |
50 | 2 | 1 | |
|
Pg&e Yuba County |
50 | 1 | 1 | |
|
Poindexter Nut Company Fresno County |
50 | 1 | 1 | |
|
Primm Valley Golf Club San Bernardino County |
50 | 4 | 2 | |
|
Sunny Acres Preschool Tulare County |
50 | 1 | 1 | |
|
The Morning Star Packing Company Merced County |
50 | 1 | 1 | |
|
Caltrans Mountain Pass Jpoe Cvef San Bernardino County |
49 | 3 | 2 | |
|
Dutch Slough Water Works Contra Costa County |
49 | 1 | 1 | |
|
Monterey Mushrooms Maher Crt Monterey County |
49 | 1 | 1 | |
|
Faith and Family Farms WS Monterey County |
48 | 2 | 1 | |
|
Maher RD WS #05 Monterey County |
48 | 1 | 1 | |
|
Shasta View Heights Owners Association Siskiyou County |
48 | 1 | 1 | |
|
Tierra Verde Mwc Monterey County |
48 | 1 | 1 | |
|
Bear Valley Water Company San Luis Obispo County |
45 | 2 | 1 | |
|
Casa Medanos Water System Contra Costa County |
45 | 1 | 1 | |
|
Excell Center Stanislaus County |
45 | 1 | 1 | |
|
Main Street Produce Santa Barbara County |
45 | 1 | 1 | |
|
San Miguel WS #03 Monterey County |
45 | 1 | 1 | |
|
Spreckels LN WS #03 Monterey County |
45 | 1 | 1 | |
|
Tank Farm Business Park San Luis Obispo County |
45 | 2 | 1 | |
|
Woodside WA Monterey County |
45 | 1 | 1 | |
|
Darling Ingredients Turlock Stanislaus County |
43 | 1 | 1 | |
|
Darr Water CO San Bernardino County |
43 | 4 | 1 | |
|
The Fruit Yard Restaurant Stanislaus County |
43 | 1 | 1 | |
|
Bucktail Mutual Water Company Trinity County |
42 | 3 | 2 | |
|
Chemurgic Agricultural Chemicals, Inc. Stanislaus County |
42 | 2 | 2 | |
|
Sierra North Community Service District Inyo County |
42 | 1 | 1 | |
|
West Tech Industrial Park Fresno County |
42 | 2 | 1 | |
|
Bay Standards Contra Costa County |
41 | 1 | 1 | |
|
Deep Springs College Inyo County |
40 | 1 | 1 | |
|
Emerald Valley-Zabala WS Monterey County |
40 | 1 | 1 | |
|
Harrison RD WS #01 Monterey County |
40 | 1 | 1 | |
|
Open Sky Ranch Fresno County |
40 | 1 | 1 | |
|
Ray Water Company Santa Barbara County |
40 | 1 | 1 | |
|
Slo Partners San Luis Obispo County |
40 | 1 | 1 | |
|
Womack Subdivision M.w.c. Tehama County |
40 | 2 | 2 | |
|
Yolo CO Central Landfill Yolo County |
40 | 2 | 1 | |
|
Yuba Apartment Homes Sutter County |
40 | 1 | 1 | |
|
Ali Mutual Water CO Tulare County |
39 | 1 | 1 | |
|
Bud Fine Mwc Trinity County |
37 | 2 | 1 | |
|
Evergreen Mobile Home Park Merced County |
36 | 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.