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 |
|---|---|---|---|---|
|
Sugar Pine Homeowners Assoc Madera County |
120 | 2 | 2 | |
|
Forest Ranch Mutual Water System Butte County |
118 | 1 | 1 | |
|
Coarsegold Market Madera County |
115 | 2 | 1 | |
|
Diamond Jack's RV Ranch San Diego County |
115 | 1 | 1 | |
|
H and R Facilities Fresno County |
115 | 1 | 1 | |
|
Yolo CO Airport Yolo County |
114 | 2 | 1 | |
|
Corning RV Park Tehama County |
112 | 1 | 1 | |
|
HI Desert Mwc San Bernardino County |
112 | 4 | 2 | |
|
West Park Properties Del Norte County |
112 | 2 | 2 | |
|
Calvary Chapel of Red Bluff Tehama County |
110 | 1 | 1 | |
|
Cdf Owens Valley Conservation Camp Inyo County |
110 | 1 | 1 | |
|
Halcyon Water System San Luis Obispo County |
110 | 3 | 1 | |
|
Mission Farm R.v. Park San Benito County |
110 | 1 | 1 | |
|
Mjusd Cordua School Yuba County |
110 | 2 | 2 | |
|
Russos Mobile Park Contra Costa County |
110 | 2 | 2 | |
|
Shasta CO Csa # 13 Alpine Meadows Shasta County |
109 | 1 | 0 | |
|
Sunrise Mutual Water Co. Tulare County |
109 | 3 | 2 | |
|
Sunnyside Convalescent Hosp Fresno County |
107 | 4 | 2 | |
|
Gold Mountain Csd Plumas County |
106 | 1 | 1 | |
|
Mountain Creek School El Dorado County |
106 | 1 | 1 | |
|
Wildwood Mobile Home PK INC Madera County |
106 | 1 | 1 | |
|
Packwood School Tulare County |
105 | 1 | 1 | |
|
Mecchi Water Company Santa Clara County |
104 | 1 | 1 | |
|
Pinyon Crest HOA Riverside County |
104 | 1 | 1 | |
|
Southwest Tract W M D [sws] Sacramento County |
103 | 1 | 1 | |
|
Betabel RV Resort San Benito County |
102 | 2 | 1 | |
|
Plug Connection Lodi San Joaquin County |
102 | 1 | 1 | |
|
Harbin Hot Springs Lake County |
101 | 1 | 1 | |
|
B & W Resort Marina Sacramento County |
100 | 3 | 1 | |
|
Black Butte Junior High School Shasta County |
100 | 1 | 1 | |
|
Cal Fire-Eel River Conservation Camp Humboldt County |
100 | 2 | 1 | |
|
Glenwood Mobile Home Park San Joaquin County |
100 | 2 | 2 | |
|
Hess Winery Napa County |
100 | 2 | 1 | |
|
Howell Mountain School Napa County |
100 | 1 | 1 | |
|
Lytle Creek Administration Site San Bernardino County |
100 | 5 | 3 | |
|
North Trails Mutual Water Company Los Angeles County |
100 | 3 | 1 | |
|
Oasis Property Owners Association Kern County |
100 | 1 | 1 | |
|
Peak to Peak Mountain Charter School WS Kern County |
100 | 3 | 1 | |
|
Pine Ridge School Fresno County |
100 | 1 | 1 | |
|
Sandmound Mutual Contra Costa County |
100 | 2 | 2 | |
|
Shasta Cascade Mobilehome Park Siskiyou County |
100 | 1 | 1 | |
|
Sierra Estates Mutual Water Company Nevada County |
100 | 2 | 1 | |
|
Spring Valley School Butte County |
100 | 3 | 2 | |
|
Willow Creek School Siskiyou County |
100 | 2 | 1 | |
|
Willowside Terrace Water Association San Diego County |
100 | 2 | 1 | |
|
Bend Mobilehome & RV Park Tehama County |
99 | 1 | 1 | |
|
Castello DI Amorosa Napa County |
98 | 1 | 1 | |
|
Long Barn Property Owners Tuolumne County |
97 | 2 | 1 | |
|
California Citrus Association Tulare County |
96 | 1 | 1 | |
|
Rancho San Joaquin Mwc San Benito County |
96 | 3 | 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.