All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Las Colinas Road & Water Assn Santa Cruz County |
70 | 0 | 0 | |
|
Leapin' Lizard RV Ranch San Diego County |
70 | 0 | 0 | |
|
Little Valley Csd Lassen County |
70 | 2 | 1 | |
|
Loma Vista Inn WS Monterey County |
70 | 0 | 0 | |
|
Los Carneros Mwa Monterey County |
70 | 0 | 0 | |
|
Lundy Lake Resort Mono County |
70 | 0 | 0 | |
|
Mercey Hot Springs Fresno County |
70 | 0 | 0 | |
|
Muir Industries Inc. San Diego County |
70 | 0 | 0 | |
|
Mycopia LLC Sebastopol · Sonoma County |
70 | 0 | 0 | |
|
Napa River Ranch Napa County |
70 | 5 | 3 | |
|
New Hope Church of the Nazarene Stanislaus County |
70 | 0 | 0 | |
|
New Horizons Mobile/rv Park Fresno County |
70 | 0 | 0 | |
|
New Meadows Tehama County |
70 | 2 | 1 | |
|
North Lone Pine Mutual Water Company Inyo County |
70 | 1 | 1 | |
|
Oak Ridge Winery, LLC San Joaquin County |
70 | 1 | 0 | |
|
Pacific Woodtech Tehama County |
70 | 0 | 0 | |
|
Pinecrest San Diego County |
70 | 0 | 0 | |
|
Plum Valley Elem School (new School) Tehama County |
70 | 1 | 1 | |
|
Post Ranch Inn WS Monterey County |
70 | 0 | 0 | |
|
Prosser Campground Nevada County |
70 | 0 | 0 | |
|
Pulikla Tribe County |
70 | 2 | 0 | |
|
Reeds Creek Estates Tehama County |
70 | 0 | 0 | |
|
Riverbench Winery Santa Barbara County |
70 | 0 | 0 | |
|
Rivernook Campground Kern County |
70 | 0 | 0 | |
|
Ryde Hotel Sacramento County |
70 | 0 | 0 | |
|
Santa Margarita KOA San Luis Obispo County |
70 | 0 | 0 | |
|
Sierra Pines Mobile Home Park Alpine County |
70 | 1 | 1 | |
|
Silverfork Campground El Dorado County |
70 | 0 | 0 | |
|
Sonoma County Parks-Stillwater Cove Sonoma County |
70 | 1 | 1 | |
|
Sonoma Seventh Day Adventist Church Sonoma County |
70 | 0 | 0 | |
|
Sweet Briar Camp Shasta County |
70 | 0 | 0 | |
|
Tharp Real Properties Tulare County |
70 | 0 | 0 | |
|
Tnf-Loganville CG Sierra County |
70 | 0 | 0 | |
|
Trentadue Winery Sonoma County |
70 | 0 | 0 | |
|
Turner Trailer Park County |
70 | 7 | 1 | |
|
Upper Deer Creek Tract Fresno County |
70 | 0 | 0 | |
|
Valley Mobile Home Park Imperial County |
70 | 3 | 1 | |
|
Valley Vista Mutual Water Company Inyo County |
70 | 0 | 0 | |
|
VFW Post 5551 San Bernardino County |
70 | 2 | 0 | |
|
Washington Ridge C.c. Nevada County |
70 | 1 | 1 | |
|
Wayside Motel Apartments Wtr Sys San Joaquin County |
70 | 0 | 0 | |
|
West Valley Mutual Water Company Kern County |
70 | 1 | 1 | |
|
Westley Csd Stanislaus County |
70 | 1 | 1 | |
|
Westport County Water District Mendocino County |
70 | 0 | 0 | |
|
Wilshire Heights Mutual Water Company Sonoma County |
70 | 0 | 0 | |
|
Wine Country Ind Park Bldg C Sonoma County |
70 | 0 | 0 | |
|
Bakersfield National Cemetery WS Kern County |
69 | 1 | 0 | |
|
Bogle Family Limited Partner Yolo County |
69 | 1 | 1 | |
|
Camp Concord El Dorado County |
69 | 0 | 0 | |
|
Creekbridge Mutual Water Company San Benito County |
69 | 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.