All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Athal Mutual Water System Kern County |
150 | 0 | 0 | |
|
Austin Creek Mutual (springhill) Sonoma County |
150 | 0 | 0 | |
|
Baker Ranch Water Corp Placer County |
150 | 3 | 1 | |
|
Bakersfield 420 Club Kern County |
150 | 0 | 0 | |
|
Barstow Army Heliport San Bernardino County |
150 | 0 | 0 | |
|
Bear Valley MHP San Bernardino County |
150 | 0 | 0 | |
|
Bella Vista Mutual Water Company Kern County |
150 | 0 | 0 | |
|
Belmont Country Club Fresno County |
150 | 0 | 0 | |
|
Betteravia Gas & Mart Santa Barbara County |
150 | 0 | 0 | |
|
Bigleys Market / Brass Rail Nevada County |
150 | 0 | 0 | |
|
Birchim Community Service District Mono County |
150 | 0 | 0 | |
|
Booth Ranches LLC Tulare County |
150 | 1 | 0 | |
|
Buehner Water System Stanislaus County |
150 | 0 | 0 | |
|
Buhach Pentecost Hall Merced County |
150 | 1 | 0 | |
|
Butano Canyon Mutual San Mateo County |
150 | 0 | 0 | |
|
Cal Fire Baseline Conservation Camp Tuolumne County |
150 | 1 | 1 | |
|
Calico Lake Homeowners San Bernardino County |
150 | 3 | 1 | |
|
California Orchard WS Monterey County |
150 | 0 | 0 | |
|
Calpine (geysers Administration Center) Sonoma County |
150 | 0 | 0 | |
|
Calportland Oro Grande Plant San Bernardino County |
150 | 0 | 0 | |
|
Camp Liahona Redwoods Sonoma County |
150 | 0 | 0 | |
|
Camp Menzies Calaveras County |
150 | 0 | 0 | |
|
Camp Morning Star San Bernardino County |
150 | 0 | 0 | |
|
Camp Rucker Lake Nevada County |
150 | 0 | 0 | |
|
Caruthers Raisin Packing CO Fresno County |
150 | 1 | 0 | |
|
Casmalia Community Services District Santa Barbara County |
150 | 1 | 1 | |
|
Castle Airport Merced County |
150 | 1 | 1 | |
|
Cbuso Dba Woodbridge Winery San Joaquin County |
150 | 1 | 0 | |
|
China Lake Naval Air South Range Kern County |
150 | 0 | 0 | |
|
Clio Rivers Edge RV Park Plumas County |
150 | 0 | 0 | |
|
Collegeville Market & Cafe San Joaquin County |
150 | 0 | 0 | |
|
Comfort Inn & Suites Tulare County |
150 | 0 | 0 | |
|
Delta Sportsman Contra Costa County |
150 | 0 | 0 | |
|
Desert Dawn Mwc San Bernardino County |
150 | 1 | 0 | |
|
Dorner Family Vineyards Kern County |
150 | 0 | 0 | |
|
Dwr San Luis Division O&m Merced County |
150 | 0 | 0 | |
|
Elkins Ranch Ventura County |
150 | 2 | 1 | |
|
Fairway Mutual Water CO Tulare County |
150 | 1 | 0 | |
|
Flag IS UP Farms Santa Barbara County |
150 | 0 | 0 | |
|
Foster Road Mutual Water Company Santa Barbara County |
150 | 4 | 0 | |
|
Gateway Restaurant & Lodge Tulare County |
150 | 0 | 0 | |
|
George Chiala Farms INC Santa Clara County |
150 | 0 | 0 | |
|
Gurdwara Gur Nanak Parkash Fresno Fresno County |
150 | 1 | 0 | |
|
Grindstone Rancheria County |
150 | 9 | 4 | |
|
Harmony Ridge Market Nevada County |
150 | 0 | 0 | |
|
Hill Country Community Clinic & Wellness Shasta County |
150 | 0 | 0 | |
|
Hines Nurseries Winters North Solano County |
150 | 2 | 1 | |
|
Hollister Ranch Estates San Benito County |
150 | 0 | 0 | |
|
Hop Kiln Winery Sonoma County |
150 | 0 | 0 | |
|
Islander Marina San Joaquin County |
150 | 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.