All water systems in California
2,996 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Cold Spring Tavern Santa Barbara County |
120 | 2 | 0 | |
|
Concord MT Diablo Trailride Assoc. Contra Costa County |
120 | 0 | 0 | |
|
Corti Water System San Joaquin County |
120 | 0 | 0 | |
|
Csp Marconi Conference Center Marin County |
120 | 0 | 0 | |
|
Echo Lake Camp El Dorado County |
120 | 0 | 0 | |
|
Foxfield Riding School Ventura County |
120 | 0 | 0 | |
|
Gas N Save Contra Costa County |
120 | 0 | 0 | |
|
Institute of Mental Physics San Bernardino County |
120 | 3 | 1 | |
|
Johnson Valley Community Center San Bernardino County |
120 | 0 | 0 | |
|
Lower Deer Creek Tract Fresno County |
120 | 1 | 0 | |
|
Luna Trattoria Mendocino County |
120 | 1 | 1 | |
|
Nott-Hill Investment Corp (water) Madera County |
120 | 0 | 0 | |
|
Pedrick Produce Solano County |
120 | 1 | 0 | |
|
Pnf Kenzie Ravine 1 & 2 Plumas County |
120 | 0 | 0 | |
|
Road Trip Bar & Grill Yolo County |
120 | 0 | 0 | |
|
Sherman Acres Mutual Water Asn Calaveras County |
120 | 0 | 0 | |
|
Big Sur Bazaar WS Monterey County |
119 | 0 | 0 | |
|
Green Meadows Outdoor School Mariposa County |
119 | 1 | 0 | |
|
Menf-Letts Lake CG Colusa County |
118 | 0 | 0 | |
|
Chimney Rock Winery Napa County |
116 | 0 | 0 | |
|
Hessel Church Sonoma County |
116 | 0 | 0 | |
|
Usfs-Monte Cristo Camp T-4 Los Angeles County |
116 | 0 | 0 | |
|
Anza Petroleum INC Riverside County |
115 | 1 | 1 | |
|
Black Chasm Cavern Amador County |
115 | 0 | 0 | |
|
Ebrpd Alhambra Contra Costa County |
115 | 0 | 0 | |
|
Gerle Creek Summer Homes El Dorado County |
115 | 0 | 0 | |
|
Hunewill Guest Ranch Mono County |
115 | 0 | 0 | |
|
Jubilee Railroad Wilderness Lodge Siskiyou County |
115 | 0 | 0 | |
|
Paradise Canyon Improvement Association Santa Barbara County |
115 | 0 | 0 | |
|
Deer Creek RV Park Tulare County |
114 | 2 | 0 | |
|
Lone Wolf Colony San Bernardino County |
114 | 0 | 0 | |
|
Silverfork Mutual Water El Dorado County |
114 | 0 | 0 | |
|
Agua Dulce Winery Los Angeles County |
113 | 0 | 0 | |
|
Harley Farms Goat Dairy San Mateo County |
113 | 0 | 0 | |
|
Jamestown Arco & O'byrnes Ferry Storage Tuolumne County |
113 | 0 | 0 | |
|
Lakeshore Resort Fresno County |
113 | 0 | 0 | |
|
Usfs-Chantry Flats-A16 Water Los Angeles County |
113 | 0 | 0 | |
|
Western Sierra Charter Schools Madera County |
113 | 0 | 0 | |
|
Angeles Crest Christian Camp Los Angeles County |
112 | 1 | 0 | |
|
Larsen's Office Complex Lake County |
112 | 0 | 0 | |
|
Navarro Vineyards Mendocino County |
112 | 0 | 0 | |
|
Rmrc-Quaking Aspen Campground Tulare County |
112 | 0 | 0 | |
|
Weed Golf Club, Inc. Siskiyou County |
112 | 0 | 0 | |
|
Lazy J Ranch Motel Tulare County |
111 | 1 | 0 | |
|
Midway Stars 76 Gas Station & Food Mart Vacaville · Solano County |
111 | 0 | 0 | |
|
Owl Harbor Sacramento County |
111 | 0 | 0 | |
|
Sveadal Water System Santa Clara County |
111 | 0 | 0 | |
|
Chisan Orchids Nursery Santa Barbara County |
110 | 1 | 1 | |
|
Copus Road LLC Kern County |
110 | 0 | 0 | |
|
Duck Island RV Park Sacramento County |
110 | 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.