All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Elk Creek Community S.d. Glenn County |
184 | 0 | 0 | |
|
Grapevine RV Park Kern County |
184 | 0 | 0 | |
|
Los Angeles Residential Community Founda Los Angeles County |
184 | 1 | 1 | |
|
Foothill Estates WS Monterey County |
183 | 0 | 0 | |
|
Associations of Thompson Lake Plumas County |
182 | 0 | 0 | |
|
Big Redwood Park Water Santa Cruz County |
182 | 1 | 1 | |
|
Csp Caswell State Park San Joaquin County |
182 | 0 | 0 | |
|
Fcsa 43 Raisin City Fresno County |
182 | 0 | 0 | |
|
Fcwwd 38/sky Harbour Fresno County |
182 | 0 | 0 | |
|
Sierra Co. W.w.d #1 Calpine Sierra County |
182 | 0 | 0 | |
|
Sunset Beach Mutual Water CO Santa Cruz County |
182 | 0 | 0 | |
|
Copco Lake Mwc Siskiyou County |
181 | 2 | 2 | |
|
Mt. Hamilton Grandview Restaurant Santa Clara County |
181 | 0 | 0 | |
|
Camp Tecuya Water System Kern County |
180 | 0 | 0 | |
|
Camptonville Community Serv Dist Yuba County |
180 | 2 | 1 | |
|
Caribou Mobile Park PWS San Joaquin County |
180 | 0 | 0 | |
|
Colby Ranch-United Methodist Camp Los Angeles County |
180 | 0 | 0 | |
|
Cws Fremont Valley Kern County |
180 | 0 | 0 | |
|
Dwr Delta Field Division Banks PP Contra Costa County |
180 | 0 | 0 | |
|
Foothills Manufactured Home Communuty Butte County |
180 | 1 | 1 | |
|
Fresno Clovis Rwrf Water System Fresno · Fresno County |
180 | 1 | 0 | |
|
Hmc Group Cold Storage Fresno County |
180 | 0 | 0 | |
|
Los Angeles World Airports Los Angeles County |
180 | 0 | 0 | |
|
Los Vaqueros Marina Bldg Contra Costa County |
180 | 0 | 0 | |
|
Marina Landfill WS Monterey County |
180 | 1 | 0 | |
|
Northbay Logistics Center Fka Savemart Solano County |
180 | 0 | 0 | |
|
Ortega Oaks RV Park&campground Riverside County |
180 | 2 | 2 | |
|
Saratoga Springs, Inc. Santa Clara County |
180 | 0 | 0 | |
|
Southern California Blending Center INC San Bernardino County |
180 | 0 | 0 | |
|
Three Rivers Elementary School Tulare County |
180 | 0 | 0 | |
|
Lower Springs Water CO Tulare County |
179 | 0 | 0 | |
|
Burrel Union Elementary School Fresno County |
178 | 2 | 2 | |
|
City of Modesto Walnut Manor Modesto · Stanislaus County |
178 | 0 | 0 | |
|
Gayla Manor PWS San Joaquin County |
178 | 0 | 0 | |
|
Orland Mobile H.p. Glenn County |
178 | 0 | 0 | |
|
Par Country Estates Csa-16 San Joaquin County |
178 | 0 | 0 | |
|
Rio Lindo Adventist Academy Sonoma County |
178 | 0 | 0 | |
|
Western Mobile Home Park Sonoma County |
178 | 1 | 1 | |
|
Canyon Creek Outdoor Education Center Los Angeles County |
177 | 0 | 0 | |
|
Pleasant Grove Elem. School Sutter County |
177 | 0 | 0 | |
|
Marble Quarry Resort Tuolumne County |
176 | 1 | 0 | |
|
Porterville Developmental Center Tulare County |
176 | 0 | 0 | |
|
River Ranch MHP San Bernardino County |
176 | 1 | 0 | |
|
Rivers Bend Resort El Dorado County |
176 | 0 | 0 | |
|
Woodridge Mutual Water CO Shasta County |
176 | 1 | 1 | |
|
Alpine Springs Mobile Home Park Los Angeles County |
175 | 2 | 2 | |
|
Antelope Creek MHP Tehama County |
175 | 0 | 0 | |
|
Banner Small Water Company San Diego County |
175 | 1 | 0 | |
|
Carson Landscape Industries Sacramento County |
175 | 1 | 1 | |
|
Cornerstone Sonoma Sonoma County |
175 | 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.