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 |
|---|---|---|---|---|
|
Rancho Colorado WS Tehama County |
34 | 2 | 2 | |
|
Reforestation Technologies International Santa Clara County |
34 | 1 | 1 | |
|
Camp Scheideck Ventura County |
33 | 1 | 1 | |
|
Desotec US LLC Tehama County |
33 | 1 | 1 | |
|
Rancho Seco Inc. Water System Kern County |
33 | 1 | 1 | |
|
UC Desert Research and Extension Center Imperial County |
33 | 2 | 0 | |
|
Whitethorn Elementary School Humboldt County |
33 | 2 | 1 | |
|
Clear Creek Market Shasta County |
32 | 1 | 1 | |
|
Colonia Santa Maria Contra Costa County |
32 | 2 | 2 | |
|
Cypress Canyon Water System Kern County |
32 | 2 | 1 | |
|
Frccsd Old Mill Ranch Plumas County |
32 | 1 | 1 | |
|
Glen Ivy Hot Springs Riverside County |
32 | 1 | 1 | |
|
Haykingdom, Inc. Imperial · Imperial County |
32 | 2 | 1 | |
|
Shastina Mobile Estates Siskiyou County |
32 | 1 | 1 | |
|
Blue Lakes Mobile Home Park Lake County |
31 | 1 | 1 | |
|
Durham Ferry Community School San Joaquin County |
31 | 1 | 1 | |
|
Mark West Meadows Mutual Water Sonoma County |
31 | 1 | 1 | |
|
McAlpine Lake & Park San Benito County |
31 | 1 | 1 | |
|
Monterey Bay Nursery WS Monterey County |
31 | 1 | 1 | |
|
Spreckels LN WS #02 Monterey County |
31 | 2 | 1 | |
|
Whiskeytown Nra-Headquarters Shasta County |
31 | 1 | 1 | |
|
Alpine CO Community Development Alpine County |
30 | 1 | 1 | |
|
Bornt 1992 Irrevocable Trust Imperial County |
30 | 2 | 1 | |
|
California Nut Company Stanislaus County |
30 | 1 | 1 | |
|
California Walnuts Tehama County |
30 | 1 | 1 | |
|
Cardoza Villa Corp San Joaquin County |
30 | 2 | 1 | |
|
Crew Wine Company Yolo County |
30 | 3 | 1 | |
|
Higuera Apartments San Luis Obispo County |
30 | 3 | 2 | |
|
Iid North End Consolidation Imperial County |
30 | 2 | 1 | |
|
Jean Harvie School [sws] Sacramento County |
30 | 1 | 1 | |
|
Jennings Wwtp Stanislaus County |
30 | 1 | 1 | |
|
Jireh Packing Group Cutler Tulare County |
30 | 1 | 1 | |
|
Krotona Institute Ventura County |
30 | 2 | 1 | |
|
Larsen Ranch 39-40/water System San Joaquin County |
30 | 4 | 3 | |
|
Lindy's Landing Tulare County |
30 | 1 | 1 | |
|
Mammoth Pool Mobile Home Park Madera County |
30 | 2 | 1 | |
|
Rutherford Hill Winery Napa County |
30 | 2 | 1 | |
|
Sable Offshore Corp Popco Santa Barbara County |
30 | 1 | 1 | |
|
Seneca Family of Agencies Sonoma County |
30 | 1 | 1 | |
|
Senior Care Villa Water Placer County |
30 | 1 | 1 | |
|
Sierra Bella Mutual Water Company Kern County |
30 | 1 | 1 | |
|
Vulcan Materials Company Cal Mat Ventura County |
30 | 1 | 1 | |
|
Bogle Vineyards Tasting Room Yolo County |
29 | 1 | 1 | |
|
McCahon Floral WS Monterey County |
29 | 1 | 1 | |
|
EL Camino WC INC Monterey County |
28 | 1 | 1 | |
|
Somerston Winery Napa County |
28 | 1 | 1 | |
|
Lake Success Mobile Lodge Tulare County |
27 | 1 | 1 | |
|
Peju Province Napa County |
27 | 1 | 1 | |
|
Tarditi Rentals Water San Joaquin County |
27 | 1 | 1 | |
|
Edna Beaman Elementary School Mono County |
26 | 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.