All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Tahoe Timber Trails Nevada County |
254 | 1 | 1 | |
|
Almond Grove Mobile Park Butte County |
253 | 2 | 1 | |
|
Branch Elementary School San Luis Obispo County |
253 | 0 | 0 | |
|
Nid Scotts Flat Lake Reservoir Nevada County |
253 | 0 | 0 | |
|
Bluebell Valley Mwc Tuolumne County |
252 | 1 | 0 | |
|
Dairyland School Madera County |
252 | 0 | 0 | |
|
Firebaugh Travel Plaza (sw) Merced County |
252 | 0 | 0 | |
|
Houghton-Kearney School Fresno County |
252 | 0 | 0 | |
|
Rancho Colina Mobile Home Park San Luis Obispo County |
252 | 1 | 0 | |
|
Ruth Lake Recreation Area Trinity County |
252 | 0 | 0 | |
|
Sonoma County Parks-Vet. Memorial Beach Sonoma County |
252 | 0 | 0 | |
|
Susan Hills Estates WC Lassen County |
252 | 0 | 0 | |
|
Lassen Vnp Summit Lake Tehama County |
251 | 0 | 0 | |
|
Royal Oaks Park WS Monterey County |
251 | 0 | 0 | |
|
Adair Kunde, LLC Sonoma County |
250 | 0 | 0 | |
|
Alpine Meadows Property Owners Asso Placer County |
250 | 0 | 0 | |
|
Altman Plants WS #04 -Esp 420 (prev Cs1) Monterey County |
250 | 0 | 0 | |
|
American Union School Fresno County |
250 | 2 | 2 | |
|
Antelope Springs Placer County |
250 | 1 | 0 | |
|
Astorgas Water System Inyo County |
250 | 0 | 0 | |
|
Bacchus Landing Cellars Healdsburg · Sonoma County |
250 | 0 | 0 | |
|
Bagdasarian Packing Thermal, LLC Riverside County |
250 | 1 | 1 | |
|
Bass Lake Heights Mutual Water Madera County |
250 | 3 | 1 | |
|
Black Butte Elementary School Shasta County |
250 | 1 | 1 | |
|
Black Butte Lake, Buckhorn Group, Uscoe Tehama County |
250 | 0 | 0 | |
|
Buena Vista Elementary School Tulare County |
250 | 1 | 0 | |
|
Camp Ritchie Amador County |
250 | 0 | 0 | |
|
Camp Sacramento El Dorado County |
250 | 0 | 0 | |
|
Camp Sierra Fresno County |
250 | 0 | 0 | |
|
Camp Winacka San Diego County |
250 | 0 | 0 | |
|
Camp Wolfeboro Calaveras County |
250 | 0 | 0 | |
|
Casa de Fruta Water System Santa Clara County |
250 | 1 | 1 | |
|
Catholic Charities Cyo Camp Sonoma County |
250 | 0 | 0 | |
|
Countryside Mkt & Restrn-119 Kern County |
250 | 1 | 0 | |
|
Cuyama Elementary School Santa Barbara County |
250 | 1 | 0 | |
|
Delta High School Yolo County |
250 | 0 | 0 | |
|
DG Campo San Diego County |
250 | 1 | 0 | |
|
Dhs Calexico Imperial County |
250 | 1 | 0 | |
|
Dollar General 19853 Squaw Valley Fresno County |
250 | 0 | 0 | |
|
Dollar General Janesville Lassen County |
250 | 0 | 0 | |
|
Dollar General Proberta Tehama County |
250 | 0 | 0 | |
|
Dollar General Store #15320 Fresno County |
250 | 0 | 0 | |
|
Dollar General Store # 14280 San Bernardino County |
250 | 1 | 0 | |
|
Dollar General Store #16171 Yolo County |
250 | 0 | 0 | |
|
East Acres Mutual Water Company Madera County |
250 | 4 | 1 | |
|
Franzia Winery San Joaquin County |
250 | 0 | 0 | |
|
Fresno Valves & Castings Fresno County |
250 | 0 | 0 | |
|
Grant Line Kitchen Llc. Sacramento County |
250 | 1 | 0 | |
|
Green Diamond Resource Company Korbel Humboldt County |
250 | 0 | 0 | |
|
Heather Glen Community Service Dist Placer County |
250 | 0 | 0 |
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.