All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
ST Francis Tract Water System Santa Cruz County |
118 | 2 | 0 | |
|
Lazy H Mutual Water Company San Diego County |
117 | 0 | 0 | |
|
Callender Grove Mutual Water San Luis Obispo County |
116 | 1 | 0 | |
|
Chimney Rock Winery Napa County |
116 | 0 | 0 | |
|
Hessel Church Sonoma County |
116 | 0 | 0 | |
|
Home Church, the San Joaquin County |
116 | 0 | 0 | |
|
Pardee Recreation Area Amador County |
116 | 0 | 0 | |
|
Redcrest Water Works Humboldt 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 | |
|
Bobcat Springs Mutual Water Company Santa Barbara County |
115 | 0 | 0 | |
|
Buhach Preschool (kindercare) Merced County |
115 | 0 | 0 | |
|
Burnt Ranch Estates Trinity County |
115 | 2 | 2 | |
|
Clear Ridge WA Monterey County |
115 | 0 | 0 | |
|
Coarsegold Market Madera County |
115 | 2 | 1 | |
|
Diamond Jack's RV Ranch San Diego County |
115 | 1 | 1 | |
|
Ebrpd Alhambra Contra Costa County |
115 | 0 | 0 | |
|
Fcsa 14 Belmont Manor Fresno County |
115 | 0 | 0 | |
|
Gerle Creek Summer Homes El Dorado County |
115 | 0 | 0 | |
|
H and R Facilities Fresno County |
115 | 1 | 1 | |
|
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 | |
|
Tehachapi Cement LLC Kern County |
115 | 0 | 0 | |
|
Deer Creek RV Park Tulare County |
114 | 2 | 0 | |
|
Dingerville USA Park Butte County |
114 | 0 | 0 | |
|
Grimmway Farms David Road Kern County |
114 | 2 | 0 | |
|
Lone Wolf Colony San Bernardino County |
114 | 0 | 0 | |
|
Los Coyotes County |
114 | 0 | 0 | |
|
Silverfork Mutual Water El Dorado County |
114 | 0 | 0 | |
|
Yolo CO Airport Yolo County |
114 | 2 | 1 | |
|
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 | |
|
Big Lagoon Csd Humboldt County |
112 | 0 | 0 | |
|
Brand Water Company Sonoma County |
112 | 0 | 0 | |
|
Corning RV Park Tehama County |
112 | 1 | 1 | |
|
Crystal Caves MHP El Dorado County |
112 | 0 | 0 | |
|
Halfway House Cafe Los Angeles County |
112 | 1 | 0 | |
|
HI Desert Mwc San Bernardino County |
112 | 4 | 2 | |
|
Larsen's Office Complex Lake County |
112 | 0 | 0 | |
|
Morada Manor Water System San Joaquin County |
112 | 0 | 0 | |
|
Navarro Vineyards Mendocino County |
112 | 0 | 0 | |
|
Pinon Valley Water Company Kern County |
112 | 0 | 0 | |
|
Rmrc-Quaking Aspen Campground Tulare County |
112 | 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.