Lead and Copper Rule Revisions (LCRR) violations in California
842 active public water systems in California had a Lead and Copper Rule Revisions (LCRR) violation in the past three years, 844 of them in the latest quarter of EPA's data. What Lead and Copper Rule Revisions (LCRR) is and why it matters.
Systems with a Lead and Copper Rule Revisions (LCRR) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Ilead Agua Dulce Charter School Los Angeles County |
450 | 1 | 1 | |
|
Son Shine Properties Kern County |
438 | 2 | 1 | |
|
EL Rio Estates Shasta County |
434 | 1 | 1 | |
|
California Pines C.s.d. Modoc County |
431 | 1 | 1 | |
|
Sky View County Water Tehama County |
429 | 2 | 1 | |
|
Grand View School Tulare County |
423 | 1 | 1 | |
|
Shasta Csa French Gulch, #11 Shasta County |
419 | 1 | 0 | |
|
Palo Verde County Water Dist. Imperial County |
410 | 4 | 2 | |
|
Triple R Mutual Water CO Tulare County |
408 | 1 | 1 | |
|
Forest Park Mwc San Bernardino County |
406 | 3 | 1 | |
|
Mobile Home Estates Sonoma County |
403 | 2 | 1 | |
|
Napa Valley Country Club Napa County |
400 | 1 | 1 | |
|
Olivet Elementary School Sonoma County |
400 | 2 | 2 | |
|
Gravenstein School District-Gravenstein Sonoma County |
398 | 1 | 1 | |
|
Winterhaven County Water District Imperial County |
394 | 2 | 1 | |
|
Chatom School (eh) Stanislaus County |
385 | 1 | 1 | |
|
Monrovia Nursery Tulare County |
385 | 2 | 2 | |
|
Bates Elementary School Sacramento County |
375 | 1 | 1 | |
|
Bridgeport Pud Mono County |
374 | 3 | 1 | |
|
Black Rascal Water Company Merced County |
367 | 1 | 1 | |
|
Volta Community SD Merced County |
366 | 2 | 1 | |
|
Havasu Water Company County |
361 | 11 | 4 | |
|
Monterey Mushrooms Santa Clara County |
361 | 1 | 1 | |
|
Fisherman's Retreat Riverside County |
352 | 1 | 1 | |
|
Butterfield Ranch San Diego County |
350 | 2 | 1 | |
|
Campos Bros. Farms Fresno County |
350 | 2 | 1 | |
|
Green Acres Mobile Home Estate Fresno County |
350 | 1 | 1 | |
|
Green River Mutual Water Co. San Luis Obispo County |
350 | 1 | 1 | |
|
Lassen View Union Elementary School Dist Tehama County |
350 | 1 | 1 | |
|
North Fork Elementary School Madera County |
350 | 1 | 1 | |
|
Orwood Resort Contra Costa County |
350 | 2 | 2 | |
|
Yettem Water System Tulare County |
350 | 1 | 1 | |
|
Dixon Migrant Center Solano County |
346 | 1 | 1 | |
|
EL Portal Mobile Estates Sonoma County |
344 | 1 | 1 | |
|
Leisure Pines Mutual Water CO Tuolumne County |
340 | 3 | 2 | |
|
Tooleville Mutual Non Profit Water Assn Tulare County |
340 | 1 | 1 | |
|
Porterville-Jones Corner Tulare County |
339 | 1 | 1 | |
|
Sunrise Village MHP Stanislaus County |
339 | 1 | 1 | |
|
Shasta Csa Castella, #3 Shasta County |
333 | 1 | 0 | |
|
Myers Flat M.w.s. Inc. Humboldt County |
330 | 2 | 1 | |
|
Sierra Moon Mutual Water Company Butte County |
330 | 2 | 1 | |
|
Washington Water District Nevada County |
330 | 3 | 1 | |
|
Lincoln Grove Estates Butte County |
327 | 3 | 1 | |
|
Berrendos School Tehama County |
325 | 1 | 1 | |
|
EL Capitan Mutual Water Company Santa Barbara County |
325 | 1 | 1 | |
|
Minarets High School Madera County |
325 | 1 | 1 | |
|
Mjusd Foothill Intermediate School Yuba County |
325 | 2 | 2 | |
|
Northwest Prep Charter School Sonoma County |
325 | 1 | 0 | |
|
Siete Robles Mutual Water CO Ventura County |
323 | 1 | 1 | |
|
Rockford School Tulare County |
321 | 1 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Lead and Copper Rule Revisions (LCRR), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Lead and Copper Rule Revisions (LCRR) 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.