All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Cali Lake RV Resort Los Angeles County |
99 | 0 | 0 | |
|
Del Oro Water Company Buzztail Dist. Butte County |
99 | 0 | 0 | |
|
Dunrovin Mobile Home Village Calaveras County |
99 | 0 | 0 | |
|
Piazza Winery Napa County |
99 | 0 | 0 | |
|
Resthaven Mobile Home Park San Luis Obispo County |
99 | 1 | 0 | |
|
Safari West Sonoma County |
99 | 0 | 0 | |
|
Castello DI Amorosa Napa County |
98 | 1 | 1 | |
|
Donner Summit Public Utility District Nevada County |
98 | 0 | 0 | |
|
Evergreen Mutual Water Company Los Angeles County |
98 | 0 | 0 | |
|
Liberty-Bellview Heights San Bernardino County |
98 | 0 | 0 | |
|
Union Heights Mwc San Benito County |
98 | 0 | 0 | |
|
Upper Lake Hardisty System County |
98 | 0 | 0 | |
|
Villa Robles Water System San Benito County |
98 | 3 | 2 | |
|
Watsonville Produce INC Monterey County |
98 | 0 | 0 | |
|
West End Mwc San Bernardino County |
98 | 0 | 0 | |
|
Adam's Vegetable Oils Colusa County |
97 | 0 | 0 | |
|
Flrish Farms WS Monterey County |
97 | 1 | 0 | |
|
Long Barn Property Owners Tuolumne County |
97 | 2 | 1 | |
|
Sikh Temple Modesto-Ceres Stanislaus County |
97 | 0 | 0 | |
|
Valley View Estates Mutual Water CO Kern County |
97 | 0 | 0 | |
|
Wilbur Hot Springs Colusa County |
97 | 0 | 0 | |
|
California Citrus Association Tulare County |
96 | 1 | 1 | |
|
Del Oro Water CO Metropolitan District Fresno County |
96 | 0 | 0 | |
|
Ocotillo Oasis, LLC San Diego County |
96 | 3 | 1 | |
|
Rancho San Joaquin Mwc San Benito County |
96 | 3 | 1 | |
|
San Clemente Rancho WS Monterey County |
96 | 0 | 0 | |
|
Usfs Beardsley Campground Tuolumne County |
96 | 0 | 0 | |
|
Vierra Canyon WS #29 Monterey County |
96 | 1 | 0 | |
|
Yurok Wautec County |
96 | 5 | 0 | |
|
49er Trailer Ranch Tuolumne County |
95 | 1 | 0 | |
|
Big Springs Union Elem. School Siskiyou County |
95 | 2 | 2 | |
|
Campers Inn RV & Golf Course Yolo County |
95 | 1 | 0 | |
|
Csp Labs & Micro Paradox Sutter County |
95 | 0 | 0 | |
|
Dunneville Estates Csa #50 San Benito County |
95 | 0 | 0 | |
|
Fenner Canyon Youth Conservation Camp Los Angeles County |
95 | 1 | 1 | |
|
Five Points Ranch Fresno County |
95 | 0 | 0 | |
|
Friedman Brothers Hardware Sonoma County |
95 | 0 | 0 | |
|
Liberty Park Water Association Orange County |
95 | 3 | 1 | |
|
Little River Inn Mendocino County |
95 | 0 | 0 | |
|
Milk Specialties Global Tulare County |
95 | 0 | 0 | |
|
Minturn Huller Merced County |
95 | 0 | 0 | |
|
Montgomery Creek School Shasta County |
95 | 1 | 1 | |
|
Rmrc-Lower Coffee Camp Day Use Tulare County |
95 | 0 | 0 | |
|
Santa Rosa Liquor and Deli Sonoma County |
95 | 0 | 0 | |
|
Shady Grove Mobile Home Park, LLC Tulare County |
95 | 0 | 0 | |
|
Summerhill MHP WS Monterey County |
95 | 0 | 0 | |
|
Tnf-Chapman CG Sierra County |
95 | 0 | 0 | |
|
Tnf-Indian Valley/rocky Rest CG Sierra County |
95 | 0 | 0 | |
|
Tucker Oaks East Water District Shasta County |
95 | 1 | 1 | |
|
Yokohl Mutual Water CO Tulare County |
95 | 5 | 2 |
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.