All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Shady Rest Trailer Court San Joaquin County |
150 | 0 | 0 | |
|
Skyline Park Napa County |
150 | 1 | 0 | |
|
Spring Valley School Madera County |
150 | 0 | 0 | |
|
ST Josephs Hospital San Joaquin County |
150 | 0 | 0 | |
|
Sugar Barge Marina Contra Costa County |
150 | 0 | 0 | |
|
Sunrise Estates Mutual Water Company San Diego County |
150 | 2 | 1 | |
|
Tassajara Springs WS Monterey County |
150 | 0 | 0 | |
|
Tequila Market Riverside County |
150 | 0 | 0 | |
|
Toyon Park Water System LLC Calaveras County |
150 | 0 | 0 | |
|
Two Rivers Sport Camp Plumas County |
150 | 0 | 0 | |
|
United Parcel Svc Anderson Shasta County |
150 | 0 | 0 | |
|
Usfs Sims Campground Shasta County |
150 | 0 | 0 | |
|
Vachell Water System San Luis Obispo County |
150 | 1 | 1 | |
|
Valpico Industrial Park San Joaquin County |
150 | 1 | 1 | |
|
Vieira's Resort, INC Sacramento County |
150 | 0 | 0 | |
|
Walker Ranch Csd Plumas County |
150 | 0 | 0 | |
|
Warmerdam Packing LLC Kings County |
150 | 0 | 0 | |
|
West Tehachapi Mutual Kern County |
150 | 0 | 0 | |
|
Willow Berm Marina Sacramento County |
150 | 0 | 0 | |
|
Wolf Creek Campground El Dorado County |
150 | 1 | 0 | |
|
Yosemite Nps-Glen Aulin Tuolumne County |
150 | 0 | 0 | |
|
Yosemite Nps-Sunrise HI Mariposa County |
150 | 0 | 0 | |
|
Yosemite Nps-Wawona Mariposa County |
150 | 1 | 0 | |
|
Youth With a Mission-Springs of Living W Butte County |
150 | 1 | 1 | |
|
Dixon 76 Solano County |
149 | 0 | 0 | |
|
Fairway Estates PWS Csa-18 San Joaquin County |
149 | 0 | 0 | |
|
Shaffer S High Sierra Camp Sierra County |
149 | 0 | 0 | |
|
Cody Water Association El Dorado County |
148 | 1 | 0 | |
|
Currier Estates Water Corp San Joaquin County |
148 | 1 | 0 | |
|
George Ranch Mutual Water Company Sonoma County |
148 | 1 | 1 | |
|
Hart Creek Estates Mutual Water Co. Kern County |
148 | 0 | 0 | |
|
MD 06 Lake Shore Park Madera County |
148 | 0 | 0 | |
|
Mulberry MHP Stanislaus County |
148 | 1 | 1 | |
|
Roseview Heights Mutual Water Company Santa Clara County |
148 | 1 | 1 | |
|
Cal Ore Mobile Estates Siskiyou County |
146 | 0 | 0 | |
|
Enchanted Hills Napa County |
146 | 0 | 0 | |
|
Hughson Nut Inc. Livingston Merced County |
146 | 1 | 0 | |
|
McGee Creek Mobile Home Park Mono County |
146 | 1 | 1 | |
|
Ponderosa Mobile Home Park Tuolumne County |
146 | 2 | 1 | |
|
Usfws San Luis Nwr Complex Merced County |
146 | 0 | 0 | |
|
Bar 717 Ranch Trinity County |
145 | 1 | 0 | |
|
Central CA Almond Growers Assn Fresno County |
145 | 0 | 0 | |
|
Corral Hollow PWS San Joaquin County |
145 | 0 | 0 | |
|
Lassen Vnp Southwest/chalet Tehama County |
145 | 0 | 0 | |
|
Mira Monte Water Co. Tehama County |
145 | 1 | 1 | |
|
Raineri Mutual Water Company Santa Clara County |
145 | 1 | 1 | |
|
San Lorenzo Seminary Santa Barbara County |
145 | 0 | 0 | |
|
San Martin Foothills Water Company Santa Clara County |
145 | 0 | 0 | |
|
Tahoe Forest Church Nevada County |
145 | 1 | 0 | |
|
Vallecito County Park San Diego County |
145 | 1 | 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.