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 |
|---|---|---|---|---|
|
Big Springs Union Elem. School Siskiyou County |
95 | 2 | 2 | |
|
Fenner Canyon Youth Conservation Camp Los Angeles County |
95 | 1 | 1 | |
|
Liberty Park Water Association Orange County |
95 | 3 | 1 | |
|
Montgomery Creek School Shasta County |
95 | 1 | 1 | |
|
Tucker Oaks East Water District Shasta County |
95 | 1 | 1 | |
|
Yokohl Mutual Water CO Tulare County |
95 | 5 | 2 | |
|
Bella Vista Water Sys Contra Costa County |
93 | 3 | 2 | |
|
Randal's Ranchette Mutual Water Company Sonoma County |
93 | 2 | 2 | |
|
San Miguel WS #22 Monterey County |
93 | 1 | 1 | |
|
Nishi Quality Flowers, Inc. Ventura County |
92 | 1 | 1 | |
|
Oak Manor WS Monterey County |
92 | 1 | 1 | |
|
Rapid River Mobilehome Park Shasta County |
92 | 2 | 1 | |
|
Spanish Flat Water District Napa County |
92 | 2 | 1 | |
|
Davis Migrant Center (ciudad del Sol) Yolo County |
91 | 1 | 1 | |
|
Encinal RD WS #01 Monterey County |
91 | 3 | 1 | |
|
Blue Lakes Improvement Club Lake County |
90 | 1 | 1 | |
|
Clark Street Community Well Kern County |
90 | 3 | 3 | |
|
Lake Shasta Pines RV Park & Campground Shasta County |
90 | 2 | 1 | |
|
Mettler County Water District Kern County |
90 | 2 | 1 | |
|
Raymond Vineyard & Cellar Napa County |
90 | 1 | 1 | |
|
Sable Offshore Corp las Flores Canyon Santa Barbara County |
90 | 1 | 1 | |
|
Saddleback Mutual Water Co. Tehama County |
90 | 1 | 1 | |
|
South Cloverdale Water Company Sonoma County |
90 | 2 | 2 | |
|
Spring Canyon WA Monterey County |
90 | 2 | 1 | |
|
Village Green Shasta County |
90 | 1 | 1 | |
|
Vina Elementary School Tehama County |
90 | 1 | 1 | |
|
West Cottonwood Apartments Shasta County |
90 | 2 | 0 | |
|
Wood Colony Christian School Stanislaus County |
90 | 1 | 1 | |
|
Jewel Date Co. Inc. Riverside County |
88 | 1 | 1 | |
|
Hunter Valley Csd Del Norte County |
87 | 2 | 1 | |
|
Riverbend Mobile Home & RV Park Fresno County |
87 | 1 | 0 | |
|
Delta Shores Resort Sacramento County |
85 | 2 | 2 | |
|
Lassen View Water District Tehama County |
85 | 2 | 1 | |
|
Mill Creek M.w.c. Humboldt County |
85 | 2 | 1 | |
|
Mjusd Dobbins School Yuba County |
85 | 3 | 2 | |
|
Modern Village Mwc Tehama County |
85 | 2 | 1 | |
|
Orleans Mutual Water Company Humboldt County |
85 | 2 | 2 | |
|
Stoco Mutual Water Company Kern County |
85 | 2 | 2 | |
|
Truroots Butte County |
85 | 1 | 1 | |
|
White's Steel, Inc. Riverside County |
85 | 3 | 3 | |
|
Chamisal Mwc San Bernardino County |
84 | 3 | 1 | |
|
Sierra East HOA Mono County |
84 | 1 | 1 | |
|
Valley Ford Water Association Sonoma County |
84 | 3 | 1 | |
|
Alameda County Fairgrounds Alameda County |
82 | 1 | 1 | |
|
Northwest Pipe Company San Joaquin County |
82 | 2 | 1 | |
|
The Ranch at Live Oak Ventura County |
82 | 1 | 1 | |
|
Airport Planet Water Shasta County |
81 | 1 | 1 | |
|
Hidden Valley WA Monterey County |
81 | 3 | 2 | |
|
Cal Fire-High Rock Conservation Camp Humboldt County |
80 | 3 | 2 | |
|
Canyon School Contra Costa County |
80 | 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.