All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Camp Meeker Water System Sonoma County |
1,171 | 0 | 0 | |
|
Phoenix Lake Estates CC Mwc Tuolumne County |
1,168 | 1 | 0 | |
|
Olympic Valley PSD Placer County |
1,165 | 0 | 0 | |
|
Yosemite Nps-Bridalveil Fall Mariposa County |
1,163 | 0 | 0 | |
|
Sundale Mutual Water Company A, B Los Angeles County |
1,155 | 0 | 0 | |
|
Laytonville County Water District Mendocino County |
1,152 | 0 | 0 | |
|
Laton Community Services District Fresno County |
1,151 | 1 | 1 | |
|
Bob Wiley Detention Facility Tulare County |
1,130 | 0 | 0 | |
|
Bellflower Home Garden Water Company Los Angeles County |
1,129 | 1 | 1 | |
|
Inyokern Csd Kern County |
1,125 | 1 | 1 | |
|
Sonora Meadows Mutual Wtr CO Tuolumne County |
1,123 | 2 | 1 | |
|
Temecula/vail Lake KOA Riverside County |
1,123 | 0 | 0 | |
|
Big Basin Water Company Santa Cruz County |
1,120 | 0 | 0 | |
|
Bdvwa Goat Mountain ID San Bernardino County |
1,118 | 0 | 0 | |
|
Sonoma County Csa 41-Fitch Mountain Sonoma County |
1,115 | 1 | 0 | |
|
Wild Wings Golf Community Yolo County |
1,115 | 0 | 0 | |
|
City of Modesto South Turlock Modesto · Stanislaus County |
1,109 | 0 | 0 | |
|
Fcsa 34 Millerton New Town Fresno County |
1,109 | 0 | 0 | |
|
Inyo County Pwd Independence Inyo County |
1,108 | 3 | 2 | |
|
Bakman Water-Rolling Hills Madera County |
1,107 | 2 | 2 | |
|
Family Market Water System San Joaquin County |
1,105 | 0 | 0 | |
|
North Edwards WD Kern County |
1,105 | 3 | 2 | |
|
Atascadero State Hospital San Luis Obispo County |
1,100 | 1 | 0 | |
|
Happy Camp C.s.d. Siskiyou County |
1,100 | 1 | 1 | |
|
Knights Landing Svc. Dist. Yolo County |
1,099 | 1 | 1 | |
|
Grizzly Flats Community Servic El Dorado County |
1,093 | 1 | 0 | |
|
San Joaquin County-Raymus Village San Joaquin County |
1,086 | 1 | 0 | |
|
Slo Csa No. 16 Shandon San Luis Obispo County |
1,085 | 0 | 0 | |
|
Cal AM West San Martin Santa Clara County |
1,079 | 0 | 0 | |
|
Waterford-River Pointe Stanislaus County |
1,079 | 0 | 0 | |
|
Hopland Public Utility District Mendocino County |
1,076 | 0 | 0 | |
|
La Jolla Eastern County |
1,076 | 0 | 0 | |
|
MI Wuk Village Mut Wtr CO Tuolumne County |
1,076 | 1 | 0 | |
|
Bootleg Campground Mono County |
1,075 | 0 | 0 | |
|
Trinidad, City of Trinidad · Humboldt County |
1,072 | 2 | 1 | |
|
Bodega Bay Public Utility District Sonoma County |
1,069 | 0 | 0 | |
|
Forest Lakes Mwc Santa Cruz County |
1,067 | 0 | 0 | |
|
National American Corp. Lp-Lake Minden Sutter County |
1,065 | 0 | 0 | |
|
Plymouth, City of Plymouth · Amador County |
1,060 | 1 | 1 | |
|
Thunderbird Cwd San Bernardino County |
1,056 | 2 | 0 | |
|
Taylor Farms Retail, Inc. San Benito County |
1,055 | 0 | 0 | |
|
Cal AM Goldside Madera County |
1,053 | 0 | 0 | |
|
Horseshoe Meadow Campground Inyo County |
1,052 | 0 | 0 | |
|
Del Norte Coast State Park Mill Creek Del Norte County |
1,051 | 0 | 0 | |
|
California-American Geyserville (puc) Sonoma County |
1,050 | 0 | 0 | |
|
Fallsvale Service Company San Bernardino County |
1,046 | 2 | 2 | |
|
Placer Cwa Alta Placer County |
1,044 | 0 | 0 | |
|
Ccwd West Point Calaveras County |
1,043 | 0 | 0 | |
|
California Institution for Women San Bernardino County |
1,035 | 0 | 0 | |
|
Caillier Water System San Bernardino County |
1,034 | 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.