All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Point Horizon Institute Lassen County |
48 | 0 | 0 | |
|
Pond Mutual Water Company Kern County |
48 | 0 | 0 | |
|
R a Farms Santa Cruz County |
48 | 1 | 1 | |
|
Robert Keenan Winery Napa County |
48 | 0 | 0 | |
|
Shasta View Heights Owners Association Siskiyou County |
48 | 1 | 1 | |
|
Thousand Trails Idyllwild MHC Riverside County |
48 | 0 | 0 | |
|
Tierra Verde Mwc Monterey County |
48 | 1 | 1 | |
|
Tunnel Trailer Park Sacramento County |
48 | 0 | 0 | |
|
Westlands Water District Fresno County |
48 | 0 | 0 | |
|
Wildwood Campground Mendocino County |
48 | 0 | 0 | |
|
Alta Wind Project O&m Facility Water Sys Kern County |
47 | 0 | 0 | |
|
Anderson Valley Brewing Company Mendocino County |
47 | 1 | 0 | |
|
Athena Terrace Mutual Water Company Sonoma County |
47 | 0 | 0 | |
|
Back Country Inn San Diego County |
47 | 1 | 0 | |
|
Baker Commodities Inc. Kings County |
47 | 1 | 0 | |
|
Desert View RV Resort San Bernardino County |
47 | 0 | 0 | |
|
Ebrpd Old Briones Regional Park Contra Costa County |
47 | 0 | 0 | |
|
Grier Mutual Water Company Tulare County |
47 | 0 | 0 | |
|
Heck Cellars Water System Kern County |
47 | 1 | 0 | |
|
Indian Wells Lodge Kern County |
47 | 1 | 0 | |
|
Nicasio School Marin County |
47 | 0 | 0 | |
|
Peake Ranch Santa Barbara County |
47 | 0 | 0 | |
|
Sierra Mutual Water Company Tulare County |
47 | 0 | 0 | |
|
Slide Ranch Marin County |
47 | 0 | 0 | |
|
Sweet Water Co-Op Kern County |
47 | 0 | 0 | |
|
The Jeffrey Hotel El Dorado County |
47 | 1 | 0 | |
|
Virginia Creek Settlement Mono County |
47 | 0 | 0 | |
|
Willow Creek Christian School Glenn County |
47 | 1 | 1 | |
|
Alliance Redwoods Conference Grounds Sonoma County |
46 | 1 | 0 | |
|
Coleman National Fish Hatchery Shasta County |
46 | 1 | 1 | |
|
Crowley Lake Fish Camp Mono County |
46 | 0 | 0 | |
|
Davis Jusd Fairfield School Yolo County |
46 | 1 | 0 | |
|
East Wilson Road Water Company Kern County |
46 | 2 | 1 | |
|
Foothill WA Monterey County |
46 | 1 | 1 | |
|
Fowler Care Center Fresno County |
46 | 0 | 0 | |
|
Foxen Vineyard Inc. Santa Barbara County |
46 | 0 | 0 | |
|
Giumarra Bros Fruit CO Tulare County |
46 | 0 | 0 | |
|
Hoot Owl Creek/alex. Valley Vineyards JV Sonoma County |
46 | 1 | 0 | |
|
Lancaster Estate Winery Sonoma County |
46 | 0 | 0 | |
|
Los Altos Rod and Gun Club Santa Cruz County |
46 | 0 | 0 | |
|
Los Rios Rancho Water System San Bernardino County |
46 | 1 | 0 | |
|
Orland Livestock Comm. Yard, Inc. Glenn County |
46 | 0 | 0 | |
|
Placer Cwa Monte Vista Placer County |
46 | 0 | 0 | |
|
Ponderosa Telephone-Service CT Madera County |
46 | 0 | 0 | |
|
Rancho Corta Madera San Diego County |
46 | 0 | 0 | |
|
Ruiz MHP County |
46 | 0 | 0 | |
|
Silt Wine Company Yolo County |
46 | 0 | 0 | |
|
South County Retirement Home Santa Clara County |
46 | 0 | 0 | |
|
Tahoe Valley Lodge El Dorado County |
46 | 1 | 0 | |
|
Twin Lakes Store Mono County |
46 | 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.