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 |
|---|---|---|---|---|
|
Montague, City of Montague · Siskiyou County |
1,264 | 1 | 1 | |
|
Highland Mobile Home Park Inyo County |
1,260 | 1 | 1 | |
|
Laguna Seca Recreation WS Monterey County |
1,248 | 2 | 1 | |
|
Kettleman City Csd Kettleman City · Kings County |
1,242 | 1 | 1 | |
|
Sierra Army Depot Lassen County |
1,200 | 1 | 1 | |
|
Vineyard Ave Estates Mwc Ventura County |
1,200 | 1 | 1 | |
|
Mt. Hermon Association, Inc. Santa Cruz County |
1,176 | 1 | 1 | |
|
Maxwell Public Utility District Colusa County |
1,175 | 1 | 1 | |
|
Laton Community Services District Fresno County |
1,151 | 1 | 1 | |
|
Inyokern Csd Kern County |
1,125 | 1 | 1 | |
|
Sonora Meadows Mutual Wtr CO Tuolumne County |
1,123 | 2 | 1 | |
|
Inyo County Pwd Independence Inyo County |
1,108 | 3 | 2 | |
|
Bakman Water-Rolling Hills Madera County |
1,107 | 2 | 2 | |
|
North Edwards WD Kern County |
1,105 | 3 | 2 | |
|
Happy Camp C.s.d. Siskiyou County |
1,100 | 1 | 1 | |
|
Knights Landing Svc. Dist. Yolo County |
1,099 | 1 | 1 | |
|
Plymouth, City of Plymouth · Amador County |
1,060 | 1 | 1 | |
|
Fallsvale Service Company San Bernardino County |
1,046 | 2 | 2 | |
|
Easton Authority Jpa Fresno County |
1,000 | 2 | 2 | |
|
Veterans Home of California Napa County |
1,000 | 1 | 1 | |
|
Apple Valley Heights Cwd San Bernardino County |
983 | 1 | 1 | |
|
Sultana Community Services District Tulare County |
983 | 1 | 1 | |
|
Rolling Green Utilities, Inc. Inyo County |
940 | 1 | 0 | |
|
Tulelake, City of Tulelake · Siskiyou County |
925 | 1 | 1 | |
|
Lakeside Park Association El Dorado County |
924 | 5 | 1 | |
|
Jojoba Hills Skp Resort, Inc. Riverside County |
912 | 1 | 1 | |
|
Pinon Pines Mwc Kern County |
908 | 1 | 1 | |
|
Dorris, City of Dorris · Siskiyou County |
887 | 1 | 1 | |
|
Madison Service Dist Yolo County |
876 | 8 | 1 | |
|
Juniper Riviera Cwd San Bernardino County |
858 | 2 | 1 | |
|
Apple Valley Foothill Cwd San Bernardino County |
841 | 2 | 2 | |
|
First Mace Meadow # 1 Amador County |
838 | 1 | 1 | |
|
Oasis Date Gardens Riverside County |
832 | 2 | 1 | |
|
Wal*mart Dist. Ctr/eco Res Tehama County |
825 | 1 | 1 | |
|
Big Pine Csd Inyo County |
798 | 1 | 1 | |
|
Meadowcreek Mutual Water Company Inyo County |
764 | 1 | 1 | |
|
Foothill Elementary School Fresno County |
750 | 2 | 1 | |
|
Riverdale Village Kern County |
750 | 2 | 2 | |
|
Sun Maid Growers of California Fresno County |
750 | 2 | 2 | |
|
Tahoe Park Water Company Placer County |
750 | 2 | 1 | |
|
Trinity Center M.w.c. Trinity County |
729 | 1 | 1 | |
|
Sierra High School Fresno County |
720 | 1 | 1 | |
|
Anderson Union High School Shasta County |
700 | 1 | 1 | |
|
Del Rio Mutual Los Angeles County |
700 | 1 | 1 | |
|
Junction School District Shasta County |
700 | 1 | 1 | |
|
Seville Water Company Tulare County |
691 | 1 | 1 | |
|
Hemlock Mutual Water Co. Los Angeles County |
686 | 2 | 1 | |
|
Tranquillity Irrigation District Fresno County |
686 | 3 | 1 | |
|
Scotia Csd Humboldt County |
681 | 4 | 1 | |
|
Alianza Charter School/wcsa Santa Cruz County |
670 | 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.