All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Folded Hills Winery Santa Barbara County |
235 | 1 | 0 | |
|
Freedom Ranch San Diego County |
235 | 0 | 0 | |
|
Sonora Estates Mobile Home Park Tuolumne County |
235 | 1 | 0 | |
|
Elkhorn Estates Water System San Joaquin County |
234 | 0 | 0 | |
|
North Oaks Mutual Water CO Stanislaus County |
234 | 1 | 1 | |
|
Dogwood Blue Jay Cyn Imp San Bernardino County |
232 | 1 | 1 | |
|
Nps-Hospital Rock Tulare County |
232 | 0 | 0 | |
|
Pinyon Pines County Water Dist Riverside County |
232 | 0 | 0 | |
|
Rutherford Hill Mutual Water Napa County |
232 | 0 | 0 | |
|
Acampo Water System San Joaquin County |
231 | 0 | 0 | |
|
Fossil Discovery Center Madera County |
231 | 0 | 0 | |
|
Salyer Mutual WC (formerly Riverview Ac) Trinity County |
231 | 2 | 1 | |
|
YMCA Camp Arbolado San Bernardino County |
231 | 0 | 0 | |
|
Capay Joint Union Elem. School Glenn County |
230 | 0 | 0 | |
|
Crowley Lake Trailer Park Mono County |
230 | 1 | 1 | |
|
Csa No. 31 Stonegate WS San Benito County |
230 | 1 | 0 | |
|
Diamond Jim S Casino Kern County |
230 | 0 | 0 | |
|
Famoso Fuel Stop Kern County |
230 | 0 | 0 | |
|
First Mace Meadows Unit No. 2 Amador County |
230 | 1 | 1 | |
|
Foothill Horizons Tuolumne County |
230 | 0 | 0 | |
|
Johnstonville Elementary School Lassen County |
230 | 0 | 0 | |
|
Madera CO Sa02-Wishon Cove Madera County |
230 | 0 | 0 | |
|
Miller's Landing Resort Madera County |
230 | 1 | 0 | |
|
Nord Country School Butte County |
230 | 3 | 1 | |
|
Pinewood Cove Resort Trinity County |
230 | 0 | 0 | |
|
Riverview Water Association Contra Costa County |
230 | 1 | 1 | |
|
San Jose Family Camp Tuolumne County |
230 | 0 | 0 | |
|
Table Bluff (new) Reservation County |
230 | 4 | 1 | |
|
E&j Gallo Winery Fresno County |
229 | 0 | 0 | |
|
Cinnabar Elementary School Sonoma County |
228 | 0 | 0 | |
|
Lucerne Valley Mwc San Bernardino County |
228 | 0 | 0 | |
|
Usfs Fraser Flat Campgd Tuolumne County |
228 | 1 | 0 | |
|
Willows Mobile Home Community & RV Park Glenn County |
227 | 0 | 0 | |
|
Ananda Village Nevada County |
226 | 0 | 0 | |
|
Columbine School Tulare County |
226 | 0 | 0 | |
|
Sierra Pines Camp El Dorado County |
226 | 2 | 0 | |
|
Terry School Fresno County |
226 | 1 | 1 | |
|
Corral de Tierra Country Club WS Monterey County |
225 | 1 | 1 | |
|
EL Torero Restaurant Calaveras County |
225 | 0 | 0 | |
|
I-5 and Hwy 198 Fresno County |
225 | 0 | 0 | |
|
Liberty School Sonoma County |
225 | 0 | 0 | |
|
Linden Usd-Waterloo Elementary San Joaquin County |
225 | 0 | 0 | |
|
Panoche Water District Fresno County |
225 | 0 | 0 | |
|
Tamarron Mobile Home Park Tuolumne County |
225 | 1 | 0 | |
|
Tomales Elem & Middle School Marin County |
225 | 0 | 0 | |
|
Anza Mutual Water Company Riverside County |
224 | 1 | 1 | |
|
Cypress Mutual Water CO INC Ventura County |
224 | 0 | 0 | |
|
Lucerne Vista Mwc San Bernardino County |
224 | 2 | 2 | |
|
Mountain Summit Mutual Water System Santa Cruz County |
223 | 0 | 0 | |
|
Pine Cove RV Park Trinity County |
223 | 1 | 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.