All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Crowley Lake Mutual Water Company Mono County |
175 | 0 | 0 | |
|
Doctor's Park Owners Association Siskiyou County |
175 | 0 | 0 | |
|
Dunham School Sonoma County |
175 | 1 | 1 | |
|
Fedex Ground Butte County |
175 | 0 | 0 | |
|
Hanford Christian School Kings County |
175 | 0 | 0 | |
|
Jesuit Retreat Center of the Sierra Placer County |
175 | 1 | 0 | |
|
Landmark Vineyards, Ltd. Sonoma County |
175 | 0 | 0 | |
|
Manzana Products Company, Inc. Sonoma County |
175 | 0 | 0 | |
|
Markleeville Water Co. Alpine County |
175 | 0 | 0 | |
|
Sierra Waldorf School Tuolumne County |
175 | 0 | 0 | |
|
Sky Acres Mutual Water Corp Madera County |
175 | 2 | 1 | |
|
Summerdale Campground Mariposa County |
175 | 0 | 0 | |
|
Sun Pacific Shippers-Lerdo Kern County |
175 | 0 | 0 | |
|
West Side Union School District Sonoma County |
175 | 0 | 0 | |
|
Lakeshore Villa Center Shasta County |
174 | 0 | 0 | |
|
Lands of Promise Mwc Kern County |
174 | 2 | 1 | |
|
View Crest Lodge Humboldt County |
174 | 0 | 0 | |
|
Cws-Grand Oaks Water System Kern County |
173 | 0 | 0 | |
|
Wp&a-Firebaugh Water System Madera County |
173 | 0 | 0 | |
|
Cdpr-Sector Wide Potable Water Tanks Merced County |
172 | 0 | 0 | |
|
City of Modesto North Turlock Modesto · Stanislaus County |
172 | 0 | 0 | |
|
Csp Portola State Park San Mateo County |
172 | 0 | 0 | |
|
Hog Island Oyster Co. Marin County |
172 | 0 | 0 | |
|
LA Madrona Athletic Club Santa Cruz County |
172 | 0 | 0 | |
|
Rancho San Joaquin Water Sys San Joaquin County |
172 | 0 | 0 | |
|
Magic Mountain Mutual Water Company Sonoma County |
171 | 0 | 0 | |
|
MT Lassen / Shingletown RV Park Shasta County |
171 | 0 | 0 | |
|
Amezcua Garcia Water Riverside County |
170 | 1 | 1 | |
|
Bianchi Winery County |
170 | 0 | 0 | |
|
Gambonini Family Ranch Sonoma County |
170 | 0 | 0 | |
|
Hat Creek Resort & RV Park, LLC Shasta County |
170 | 0 | 0 | |
|
Juniper Village Farm Labor Housing Dorris · Siskiyou County |
170 | 1 | 0 | |
|
Manning Gardens Care Center INC Fresno County |
170 | 0 | 0 | |
|
Mountain View Elementary School Stanislaus County |
170 | 2 | 1 | |
|
Neil's Service Center Solano County |
170 | 0 | 0 | |
|
Oakley Mutual Water Company Contra Costa County |
170 | 2 | 1 | |
|
Rancho del Rey Golf Club Merced County |
170 | 1 | 0 | |
|
Sanford Winery Santa Barbara County |
170 | 1 | 1 | |
|
Sconza Candy Company Stanislaus County |
170 | 1 | 1 | |
|
Sequoia Crest Mutual Water Company Tulare County |
170 | 0 | 0 | |
|
Turlock Auction Yard, Inc. Merced County |
170 | 1 | 1 | |
|
Zaca Mesa Winery Santa Barbara County |
170 | 0 | 0 | |
|
Leoni Meadows Camp El Dorado County |
169 | 0 | 0 | |
|
Moose Camp Shasta County |
169 | 0 | 0 | |
|
Plaza Mobile Home Park Sonoma County |
169 | 1 | 1 | |
|
Colusa Landing Colusa County |
168 | 0 | 0 | |
|
Hynes Estates Mutual Water Co. Orange County |
168 | 1 | 1 | |
|
Knights Ferry Comm. Svc. Dist. Stanislaus County |
168 | 0 | 0 | |
|
Koinonia Conference Grounds Santa Cruz County |
168 | 0 | 0 | |
|
Lemon Cove Water Company Tulare County |
168 | 2 | 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.