All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Buck Meadows Lodge-Yosemite Westgate Mariposa County |
31 | 1 | 0 | |
|
Camp McCumber Water System Shasta County |
31 | 0 | 0 | |
|
Durham Ferry Community School San Joaquin County |
31 | 1 | 1 | |
|
Fink Road Landfill Stanislaus Stanislaus County |
31 | 0 | 0 | |
|
Hagafen Cellars Napa County |
31 | 1 | 0 | |
|
Hanna Vineyards Sonoma County |
31 | 0 | 0 | |
|
I & E Lath Mill Mendocino County |
31 | 0 | 0 | |
|
Ladwp Mountain View Trailer Court Inyo County |
31 | 0 | 0 | |
|
Larkmead Vineyards Napa County |
31 | 0 | 0 | |
|
Mark West Meadows Mutual Water Sonoma County |
31 | 1 | 1 | |
|
McAlpine Lake & Park San Benito County |
31 | 1 | 1 | |
|
Michael Ellis School for Dog Trainers Sonoma County |
31 | 0 | 0 | |
|
Monterey Bay Nursery WS Monterey County |
31 | 1 | 1 | |
|
O'shaughnessy Winery Napa County |
31 | 0 | 0 | |
|
Paradise Water System Kern County |
31 | 0 | 0 | |
|
Quivira Vineyards Sonoma County |
31 | 1 | 0 | |
|
Rancho Seco Ngs (smud) Sacramento County |
31 | 1 | 0 | |
|
Redwood Glen Camp & Conference Ctr San Mateo County |
31 | 0 | 0 | |
|
Rosecrest Mutual Placer County |
31 | 0 | 0 | |
|
Seaboard Energy California, LLC Madera County |
31 | 1 | 0 | |
|
Soults Pump & Equipment Company Tulare County |
31 | 1 | 1 | |
|
Spreckels LN WS #02 Monterey County |
31 | 2 | 1 | |
|
Stevinson Bar and Grill Merced County |
31 | 0 | 0 | |
|
Whiskeytown Nra-Headquarters Shasta County |
31 | 1 | 1 | |
|
Wilcox Station Ranch Contra Costa County |
31 | 1 | 1 | |
|
Willow Creek M.w.c.-Lambertville Colusa County |
31 | 0 | 0 | |
|
Aaa Kindness Care Home Santa Barbara County |
30 | 1 | 0 | |
|
All Star Academy of Danville Contra Costa County |
30 | 0 | 0 | |
|
Alpine CO Community Development Alpine County |
30 | 1 | 1 | |
|
Animal Place Nevada County |
30 | 0 | 0 | |
|
At&t California Uer47 San Joaquin County |
30 | 0 | 0 | |
|
Azure Acres CD Recovery Center Sonoma County |
30 | 0 | 0 | |
|
Arellano MHP County |
30 | 1 | 0 | |
|
Basshole Brews Shasta County |
30 | 0 | 0 | |
|
Batterson Work Center (water) Madera County |
30 | 0 | 0 | |
|
Bird Industrial Complex Inyo County |
30 | 0 | 0 | |
|
Bornt 1992 Irrevocable Trust Imperial County |
30 | 2 | 1 | |
|
Brentwood Marina Contra Costa County |
30 | 0 | 0 | |
|
Bridgehaven Park Sonoma County |
30 | 2 | 0 | |
|
Buckley Family Partnership Sonoma County |
30 | 1 | 1 | |
|
Bud Antle, Llc-Salinas Transplant WS Monterey County |
30 | 0 | 0 | |
|
Butte Meadows Camp Butte County |
30 | 0 | 0 | |
|
Caelesta Winery Cayucos · San Luis Obispo County |
30 | 0 | 0 | |
|
Cairdean Winery Napa County |
30 | 1 | 0 | |
|
California Nut Company Stanislaus County |
30 | 1 | 1 | |
|
California Walnuts Tehama County |
30 | 1 | 1 | |
|
Caltrans, Tecate Cvef San Diego County |
30 | 1 | 0 | |
|
Cambria Winery Santa Barbara County |
30 | 0 | 0 | |
|
Camp Leonard, Sierra NV F.c. Sierra County |
30 | 0 | 0 | |
|
Cardoza Villa Corp San Joaquin County |
30 | 2 | 1 |
About this data
Rules violated counts the rules a system was in violation of in the past three years, including monitoring and reporting lapses; one rule can carry several violations. Unresolved is the number of those rules currently in violation at EPA's latest data refresh.
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.