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 |
|---|---|---|---|---|
|
Scwa Laguna/vineyard Sacramento County |
188,417 | 1 | 1 | |
|
City of Fairfield Fairfield · Solano County |
120,720 | 1 | 1 | |
|
Vallecitos WD San Diego County |
114,700 | 1 | 1 | |
|
Snow Summit San Bernardino County |
75,500 | 3 | 1 | |
|
Porterville, City of Porterville · Tulare County |
63,487 | 1 | 1 | |
|
Monterey Park-City, Water Dept. Monterey Park · Los Angeles County |
61,096 | 1 | 1 | |
|
City of West Sacramento West Sacramento · Yolo County |
55,991 | 1 | 1 | |
|
Ceres, City of Ceres · Stanislaus County |
54,513 | 1 | 1 | |
|
Calexico, City of Calexico · Imperial County |
40,357 | 1 | 1 | |
|
Scwa Mather-Sunrise Sacramento County |
32,812 | 1 | 1 | |
|
East Niles Csd Kern County |
32,517 | 2 | 1 | |
|
Suisun-Solano Water Authority Solano County |
29,105 | 2 | 1 | |
|
Dinuba, City of Dinuba · Tulare County |
27,641 | 1 | 1 | |
|
Lemoore, City of Lemoore · Kings County |
27,185 | 3 | 1 | |
|
HI Desert WD San Bernardino County |
26,660 | 1 | 1 | |
|
City of Sanger Sanger · Fresno County |
26,357 | 1 | 0 | |
|
Oakdale, City of Oakdale · Stanislaus County |
23,235 | 1 | 0 | |
|
Imperial, City of Imperial · Imperial County |
22,102 | 2 | 1 | |
|
San Lorenzo Valley Water Dist Santa Cruz County |
21,513 | 1 | 1 | |
|
Arvin Community Services Dist Kern County |
19,669 | 1 | 1 | |
|
Greenfield, City of Greenfield · Monterey County |
18,967 | 1 | 1 | |
|
Bakman Water Company Fresno County |
17,393 | 1 | 1 | |
|
City of Livingston Livingston · Merced County |
14,894 | 1 | 1 | |
|
City of Parlier Parlier · Fresno County |
14,576 | 1 | 1 | |
|
Avenal, City of Avenal · Kings County |
13,696 | 1 | 1 | |
|
City of Anderson Anderson · Shasta County |
11,323 | 1 | 1 | |
|
Sonoma, City of Sonoma · Sonoma County |
10,619 | 1 | 1 | |
|
Riverstone/rootcreek Water District Madera · Madera County |
10,276 | 1 | 1 | |
|
Farmersville, City of Farmersville · Tulare County |
10,243 | 1 | 1 | |
|
Scwa Arden Park Vista Sacramento County |
10,068 | 1 | 1 | |
|
Winton Water & Sanitary Dist Merced County |
9,745 | 1 | 1 | |
|
City of Orange Cove Orange Cove · Fresno County |
9,525 | 1 | 1 | |
|
Tehachapi, City of Tehachapi · Kern County |
9,094 | 2 | 1 | |
|
Cloverdale, City of Cloverdale · Sonoma County |
8,710 | 1 | 1 | |
|
City of Orland Orland · Glenn County |
8,298 | 1 | 1 | |
|
City of Corning Corning · Tehama County |
8,244 | 1 | 1 | |
|
Hughson, City of Hughson · Stanislaus County |
7,977 | 2 | 1 | |
|
Yreka, City of Yreka · Siskiyou County |
7,879 | 1 | 1 | |
|
Delhi Cwd Merced County |
7,784 | 1 | 1 | |
|
Earlimart Pud Tulare County |
7,679 | 1 | 1 | |
|
Folsom State Prison Sacramento County |
7,399 | 1 | 1 | |
|
City of Gridley Gridley · Butte County |
7,269 | 1 | 1 | |
|
Fort Bragg, City of Fort Bragg · Mendocino County |
7,117 | 1 | 1 | |
|
Cutler Pud Tulare County |
6,200 | 2 | 1 | |
|
City of Gustine Gustine · Merced County |
6,138 | 1 | 1 | |
|
Bear Valley Csd Kern County |
5,592 | 1 | 0 | |
|
Yosemite Spring Park Util CO Madera County |
5,300 | 3 | 3 | |
|
Ivanhoe Public Utility Dist Tulare County |
4,580 | 1 | 1 | |
|
Slvwd Felton Water System Santa Cruz County |
4,491 | 2 | 1 | |
|
Planada Csd Merced County |
4,164 | 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.