Lead and Copper Rule (LCR) violations in California
404 active public water systems in California had a Lead and Copper Rule (LCR) violation in the past three years, 404 of them in the latest quarter of EPA's data. What Lead and Copper Rule (LCR) is and why it matters.
Systems with a Lead and Copper Rule (LCR) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Riverdale Village Kern County |
750 | 2 | 2 | |
|
Sun Maid Growers of California Fresno County |
750 | 2 | 2 | |
|
High Valleys Water District Riverside County |
733 | 3 | 1 | |
|
Etna, City of Etna · Siskiyou County |
720 | 1 | 1 | |
|
Lewiston Community Services District Trinity County |
677 | 2 | 1 | |
|
Mesquite Creek County |
650 | 5 | 1 | |
|
Nepenthe WS Monterey County |
618 | 2 | 1 | |
|
Mount Laguna Improvement Assn. San Diego County |
580 | 1 | 1 | |
|
Harbor View Mutual Water Company Lake County |
550 | 1 | 1 | |
|
Hughes-Elizabeth Lake Unified School Dis Los Angeles County |
550 | 2 | 1 | |
|
Meadows Union Elementary School Imperial County |
550 | 4 | 2 | |
|
Clayton Palms Water Contra Costa County |
549 | 1 | 1 | |
|
Sid Gibson Canyon Solano County |
535 | 2 | 2 | |
|
Palms River Resort San Bernardino County |
531 | 1 | 1 | |
|
Cazadero Water Company, Inc. (puc) Sonoma County |
525 | 3 | 2 | |
|
Colusa Co. Wwd #1 Grimes Colusa County |
512 | 2 | 1 | |
|
Growers Service Assn WS (ice) Monterey County |
500 | 2 | 2 | |
|
Lsid Tonyville Tulare County |
500 | 3 | 2 | |
|
Lsid-Strathmore System Tulare County |
500 | 2 | 2 | |
|
Sky Forest Mwc San Bernardino County |
492 | 2 | 1 | |
|
Middletown Rancheria Community Water System County |
487 | 4 | 3 | |
|
Glenwood Mobile Estates Inyo County |
468 | 1 | 1 | |
|
Point Arena Water Works Mendocino County |
459 | 1 | 1 | |
|
Lassen County Water Works District #1 Lassen County |
450 | 1 | 1 | |
|
Weott C.s.d. Humboldt County |
448 | 2 | 1 | |
|
Garden Farms C.w.d. San Luis Obispo County |
440 | 1 | 1 | |
|
Sunnyside Farms Mutual Water Company Los Angeles County |
436 | 3 | 1 | |
|
Sky View County Water Tehama County |
429 | 2 | 1 | |
|
East Orosi Community Services District Tulare County |
423 | 3 | 2 | |
|
Yosemite West Water System Mariposa County |
420 | 1 | 1 | |
|
Monarch Nut Company Tulare County |
400 | 1 | 1 | |
|
Olivet Elementary School Sonoma County |
400 | 2 | 2 | |
|
Twin Lakes Resort San Diego County |
400 | 5 | 2 | |
|
Chamisal WA Monterey County |
396 | 1 | 1 | |
|
Stanislaus Union School Dist Stanislaus County |
390 | 1 | 1 | |
|
Strawberry Lodge Mwc San Bernardino County |
381 | 1 | 1 | |
|
Wildhorse Cafe WS Monterey County |
367 | 1 | 1 | |
|
Havasu Water Company County |
361 | 11 | 4 | |
|
Grimmway Enterprises Cal Organic Therm Riverside County |
360 | 1 | 1 | |
|
Wasuma School Madera County |
354 | 1 | 1 | |
|
Orwood Resort Contra Costa County |
350 | 2 | 2 | |
|
Leisure Pines Mutual Water CO Tuolumne County |
340 | 3 | 2 | |
|
Leisure Lake Mobile Estates Los Angeles County |
325 | 1 | 1 | |
|
Mjusd Foothill Intermediate School Yuba County |
325 | 2 | 2 | |
|
Palmer Creek Csd Humboldt County |
320 | 4 | 2 | |
|
Blossom Trail Cafe Fresno County |
318 | 1 | 1 | |
|
Live Oak Springs Water System San Diego County |
317 | 1 | 1 | |
|
Pine Mountain Mutual Water Co. Mendocino County |
310 | 2 | 1 | |
|
Siskiyou Lake Highlands Mwc Siskiyou County |
310 | 1 | 1 | |
|
Rand Communities Water District Kern County |
303 | 4 | 3 |
About this data
A system is counted once if any of its violations in the past three years involved Lead and Copper Rule (LCR), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Lead and Copper Rule (LCR) 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.