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 |
|---|---|---|---|---|
|
Palmer Creek Csd Humboldt County |
320 | 4 | 2 | |
|
Saint Marie Mobile Home Park Santa Barbara County |
320 | 1 | 1 | |
|
Sierra Pacific Industries Quincy Plumas County |
315 | 1 | 1 | |
|
June Lake Pud Down Canyon Mono County |
310 | 1 | 1 | |
|
Lower Rock Creek Mutual Water Co. Mono County |
310 | 1 | 1 | |
|
River Ranch Mobile Home Park Tehama County |
305 | 2 | 1 | |
|
Rand Communities Water District Kern County |
303 | 4 | 3 | |
|
Branger Mutual Water Company, Inc. Sonoma County |
300 | 1 | 1 | |
|
East Walnut Grove [sws] Sacramento County |
300 | 1 | 1 | |
|
Grizzly Creek Ranch Snj Plumas County |
300 | 1 | 1 | |
|
Lupin Lodge Santa Clara County |
300 | 2 | 1 | |
|
Mel Mar Mutual Water CO Shasta County |
300 | 1 | 1 | |
|
Mesquite Mines Inc. Imperial County |
300 | 1 | 1 | |
|
Okieville Highland Acres Mwc Tulare County |
300 | 1 | 1 | |
|
Salmon Creek Middle School Sonoma County |
300 | 2 | 0 | |
|
Spreckels Sugar Company Imperial County |
300 | 4 | 2 | |
|
Tulare County Civic Center Tulare County |
300 | 1 | 1 | |
|
Lactalis Heritage Dairy Tulare County |
295 | 3 | 1 | |
|
Manzanita Elementary School Butte County |
295 | 1 | 1 | |
|
Mariposa Pines Mutual Mariposa County |
294 | 2 | 1 | |
|
Downieville Public U.d. Sierra County |
290 | 2 | 1 | |
|
Gravenstein School District-Hillcrest Sonoma County |
289 | 1 | 1 | |
|
Grenada Sanitary District Siskiyou County |
289 | 1 | 1 | |
|
Hornbrook C.s.d. Siskiyou County |
280 | 2 | 1 | |
|
U.s. Gypsum CO Imperial County |
280 | 1 | 1 | |
|
Shasta Csa Sugarloaf, #2 Shasta County |
274 | 1 | 0 | |
|
Clay Joint Elementary School Fresno County |
271 | 1 | 1 | |
|
Alpine Meats INC San Joaquin County |
270 | 2 | 1 | |
|
Hood Water Maintence Dist [sws] Sacramento County |
267 | 1 | 1 | |
|
June Lake Pud Village Mono County |
263 | 1 | 1 | |
|
Berryessa Pines Water System Napa County |
261 | 2 | 1 | |
|
Shasta CO Csa # 8 Palo Cedro Shasta County |
261 | 1 | 0 | |
|
Irish Beach Water District Mendocino County |
254 | 1 | 1 | |
|
Tahoe Timber Trails Nevada County |
254 | 1 | 1 | |
|
Almond Grove Mobile Park Butte County |
253 | 2 | 1 | |
|
American Union School Fresno County |
250 | 2 | 2 | |
|
Bagdasarian Packing Thermal, LLC Riverside County |
250 | 1 | 1 | |
|
Bass Lake Heights Mutual Water Madera County |
250 | 3 | 1 | |
|
Black Butte Elementary School Shasta County |
250 | 1 | 1 | |
|
Casa de Fruta Water System Santa Clara County |
250 | 1 | 1 | |
|
Cuyama Elementary School Santa Barbara County |
250 | 1 | 0 | |
|
East Acres Mutual Water Company Madera County |
250 | 4 | 1 | |
|
Lake Jodie Water System San Bernardino County |
250 | 3 | 1 | |
|
Lazy Landing Mobile Home Park Shasta County |
250 | 1 | 1 | |
|
Northcrest Mobile Home Park Crescent City · Del Norte County |
250 | 2 | 2 | |
|
Pond School Water System Kern County |
250 | 2 | 1 | |
|
Ramona Water Company Riverside County |
250 | 3 | 2 | |
|
Sierra View School Madera County |
250 | 1 | 1 | |
|
Shasta Csa Cragview, #23 Shasta County |
248 | 1 | 0 | |
|
Grimmway Farms Coachella Valley Facility Riverside County |
245 | 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 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.