All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Walker RV Park Mono County |
25 | 0 | 0 | |
|
Washoe Heights Water Association Placer County |
25 | 0 | 0 | |
|
Waterford Sportsmen's Club Stanislaus County |
25 | 0 | 0 | |
|
Waterloo California Restaurant San Joaquin County |
25 | 0 | 0 | |
|
Waters Road Domestic Users Group Ventura County |
25 | 0 | 0 | |
|
Weeks Roses Water System Kern County |
25 | 0 | 0 | |
|
West 11th Street Chevron Water System San Joaquin County |
25 | 0 | 0 | |
|
West Coast Sand & Gravel Stanislaus County |
25 | 1 | 1 | |
|
West Valley Baptist Church Yolo County |
25 | 1 | 1 | |
|
Westerbeke Ranch Sonoma County |
25 | 0 | 0 | |
|
Western Holiday Lodge Tulare County |
25 | 0 | 0 | |
|
Westgate Landing Park Water System San Joaquin County |
25 | 0 | 0 | |
|
Westley Property LLC Stanislaus County |
25 | 0 | 0 | |
|
Westside Lockers Kings County |
25 | 0 | 0 | |
|
Whiskeytown Nra-Dry Creek Shasta County |
25 | 0 | 0 | |
|
Whispering Pines Mobile Home Park Yuba County |
25 | 1 | 0 | |
|
Wilcox Oaks Golf Club Tehama County |
25 | 0 | 0 | |
|
William Hill Winery Napa County |
25 | 1 | 0 | |
|
Williams Selyem Winery Sonoma County |
25 | 0 | 0 | |
|
Willow Grove Union Elementary School San Benito County |
25 | 2 | 1 | |
|
Windflower Point Mutual Water Company Lake County |
25 | 1 | 1 | |
|
Woodbridge Pizza Water System San Joaquin County |
25 | 0 | 0 | |
|
Woods Lake Rec. Area Alpine County |
25 | 0 | 0 | |
|
YMCA Camp TA TA Pochon San Bernardino County |
25 | 0 | 0 | |
|
Yolo Fliers Club Yolo County |
25 | 0 | 0 | |
|
Young-Nak Presbyterian Church Los Angeles County |
25 | 0 | 0 | |
|
Yulica Nevada County |
25 | 0 | 0 | |
|
Zansco Modesto · Stanislaus County |
25 | 0 | 0 | |
|
Zipline Nest Z Woodland · Yolo County |
25 | 0 | 0 | |
|
Zuckerman Heritage-McDonald San Joaquin County |
25 | 0 | 0 | |
|
Calico Ghost Town San Bernardino County |
24 | 0 | 0 | |
|
Canyon RV Park Orange County |
24 | 0 | 0 | |
|
Fallbrook Kamp Retreat San Diego County |
24 | 0 | 0 | |
|
Forest Ranch Mobile Park Butte County |
24 | 1 | 0 | |
|
Snug Harbor RV LP Solano County |
24 | 0 | 0 | |
|
MHC TT Inc. (dba Pio Pico) San Diego County |
23 | 0 | 0 | |
|
Mountain Empire R.v. Park and Campground San Diego County |
23 | 0 | 0 | |
|
Mwd of SO Cal Iron Mountain San Bernardino County |
23 | 0 | 0 | |
|
Rainbow Tract Water Assoc El Dorado County |
23 | 1 | 0 | |
|
Shady Oaks Mobile Home Park LLC Madera County |
23 | 2 | 0 | |
|
Sivananda Yoga Farm Nevada County |
23 | 1 | 0 | |
|
Alta Sierra Mutual Water Co. Kern County |
22 | 0 | 0 | |
|
Harris Feeding Company Fresno County |
22 | 1 | 0 | |
|
Meadow Lake Apartments Inyo County |
22 | 2 | 1 | |
|
Mill Creek/lassen Mutual Water Tehama County |
22 | 0 | 0 | |
|
Topaz Mobile Home Park Mono County |
22 | 0 | 0 | |
|
Boulevard Pines Mobile Home and RV Park San Diego County |
21 | 1 | 0 | |
|
Redlands Colony Pipeline Association San Bernardino County |
21 | 1 | 1 | |
|
Sierra Village Mobile Home Park Tuolumne County |
21 | 2 | 1 | |
|
Big Lagoon Park Water Co. Humboldt County |
20 | 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.