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 |
|---|---|---|---|---|
|
Calico Lake Homeowners San Bernardino County |
150 | 3 | 1 | |
|
Caruthers Raisin Packing CO Fresno County |
150 | 1 | 0 | |
|
Castle Airport Merced County |
150 | 1 | 1 | |
|
Elkins Ranch Ventura County |
150 | 2 | 1 | |
|
Mjusd Loma Rica School Yuba County |
150 | 2 | 2 | |
|
Ocotillo Mutual Water CO Imperial County |
150 | 1 | 1 | |
|
Pacific Bell Ue17l Water System San Joaquin County |
150 | 1 | 1 | |
|
Sunrise Estates Mutual Water Company San Diego County |
150 | 2 | 1 | |
|
Vachell Water System San Luis Obispo County |
150 | 1 | 1 | |
|
Valpico Industrial Park San Joaquin County |
150 | 1 | 1 | |
|
George Ranch Mutual Water Company Sonoma County |
148 | 1 | 1 | |
|
Roseview Heights Mutual Water Company Santa Clara County |
148 | 1 | 1 | |
|
Ponderosa Mobile Home Park Tuolumne County |
146 | 2 | 1 | |
|
Mira Monte Water Co. Tehama County |
145 | 1 | 1 | |
|
Raineri Mutual Water Company Santa Clara County |
145 | 1 | 1 | |
|
Siskiyou Co.service Area #5/carrick Siskiyou County |
143 | 2 | 2 | |
|
Kennon Water Company Santa Clara County |
142 | 1 | 1 | |
|
Pine Grove Mobile Home Park Del Norte County |
142 | 2 | 2 | |
|
Maywood Mobile Home Park Tehama County |
140 | 2 | 2 | |
|
Wynola Water District San Diego County |
140 | 2 | 1 | |
|
Plainview Mwc Central Water Tulare County |
138 | 2 | 2 | |
|
Trinity Knolls Mutual Water Company Trinity County |
138 | 2 | 2 | |
|
Cedar Valley Mutual Water CO Madera County |
137 | 2 | 1 | |
|
Abrams Lake Mobile Estates Siskiyou County |
135 | 1 | 1 | |
|
Calfire-Alder Conservation Camp Del Norte County |
135 | 2 | 2 | |
|
Kelly Mutual Water Company Sonoma County |
135 | 1 | 1 | |
|
Valley View Trailer Park Riverside County |
135 | 2 | 1 | |
|
Apple Valley Village Mhe San Bernardino County |
134 | 1 | 1 | |
|
Kern Valley Mutual Water Company Kern County |
132 | 4 | 3 | |
|
Mountain Valley Apts & Rvp Tehama County |
131 | 1 | 1 | |
|
Rio Bend RV Golf Resort & Storm Crossing Imperial County |
130 | 3 | 2 | |
|
Wilton Bible Church Sacramento County |
130 | 2 | 1 | |
|
Yosemite Terrace Estates Mariposa County |
130 | 2 | 1 | |
|
Assisi Mwc Monterey County |
126 | 1 | 1 | |
|
Bar-Len Mwc San Bernardino County |
126 | 5 | 2 | |
|
Lili Valley Water Co. Calaveras County |
126 | 1 | 1 | |
|
Coyote Valley Mutual Water CO Imperial County |
125 | 1 | 1 | |
|
Forest Ranch Charter School Butte County |
125 | 1 | 1 | |
|
Fresh Select, LLC Tulare County |
125 | 1 | 1 | |
|
Glassfab Tempering Services Inc. San Joaquin County |
125 | 1 | 1 | |
|
Grover Landscape Water System Stanislaus County |
125 | 2 | 1 | |
|
Jarvis Mutual Water System Santa Cruz County |
125 | 1 | 1 | |
|
Creekside Cabins & RV Resort Mendocino County |
124 | 2 | 2 | |
|
Phillipsville C.s.d. Humboldt County |
124 | 2 | 2 | |
|
Oak Knolls Mutual Water Company Kern County |
123 | 2 | 1 | |
|
ST Nicholas Ranch & Retreat Fresno County |
123 | 3 | 2 | |
|
Sierra View JR Academy Tulare County |
121 | 2 | 0 | |
|
Amberwood Estates, LLC Shasta County |
120 | 1 | 1 | |
|
Las Palmas Mobile Home Park Del Norte County |
120 | 2 | 1 | |
|
Madonna Inn Water Company San Luis Obispo County |
120 | 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.