All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Quail Lake Community Church Fresno County |
125 | 0 | 0 | |
|
River Creek Golf Club Madera County |
125 | 0 | 0 | |
|
River Reflections RV & Campground Butte County |
125 | 1 | 0 | |
|
Spanish Lakes Mutual Water CO San Luis Obispo County |
125 | 0 | 0 | |
|
Twin Ridges Grizzly Hill School Nevada County |
125 | 0 | 0 | |
|
Van Groningen & Sons INC Water System San Joaquin County |
125 | 0 | 0 | |
|
Wilkinson Manor A-Zone PWS San Joaquin County |
125 | 0 | 0 | |
|
Yes Charter Academy Yuba County |
125 | 1 | 0 | |
|
Creekside Cabins & RV Resort Mendocino County |
124 | 2 | 2 | |
|
E & J Gallo Winery-Sonoma Sonoma County |
124 | 0 | 0 | |
|
Gilbert Street Complex San Bernardino County |
124 | 2 | 1 | |
|
Phillipsville C.s.d. Humboldt County |
124 | 2 | 2 | |
|
Sierra King Homeowners Assn Tulare County |
124 | 1 | 1 | |
|
Sierra Woods Lodge Placer County |
124 | 0 | 0 | |
|
Bethel Island Mutual Water CO Contra Costa County |
123 | 1 | 1 | |
|
Cal AM Security Park Sacramento County |
123 | 0 | 0 | |
|
Cdfa-Mountain Pass Jpoe Ais San Bernardino County |
123 | 1 | 0 | |
|
Lockeford Mobile Home Park Wtr Sys San Joaquin County |
123 | 0 | 0 | |
|
Oak Knolls Mutual Water Company Kern County |
123 | 2 | 1 | |
|
Plainsburg Elementary School Merced County |
123 | 0 | 0 | |
|
Podesta Packing Water System San Joaquin County |
123 | 0 | 0 | |
|
ST Nicholas Ranch & Retreat Fresno County |
123 | 3 | 2 | |
|
Boisset Buena Vista Winery Sonoma County |
122 | 0 | 0 | |
|
Cedar Spring Retreat Center Madera County |
122 | 1 | 0 | |
|
Hollister Sda Christian School San Benito County |
122 | 0 | 0 | |
|
Long Canyon Water Company Corp. Kern County |
122 | 0 | 0 | |
|
Nevada ID Smartsville Yuba County |
122 | 0 | 0 | |
|
Yosemite Bug Hostel Mariposa County |
122 | 0 | 0 | |
|
Butano State Park Csp San Mateo County |
121 | 0 | 0 | |
|
Camp Elk Los Angeles County |
121 | 0 | 0 | |
|
Musick Meadows 2 Fresno County |
121 | 0 | 0 | |
|
River Oasis Riverside County |
121 | 0 | 0 | |
|
Sierra View JR Academy Tulare County |
121 | 2 | 0 | |
|
Amberwood Estates, LLC Shasta County |
120 | 1 | 1 | |
|
Big Wheel Mobile Home Park San Joaquin County |
120 | 0 | 0 | |
|
Bluffs WS Monterey County |
120 | 0 | 0 | |
|
Cal Fire-Devil's Garden Camp Modoc County |
120 | 0 | 0 | |
|
Cal Fire-Trinity River Conservation Camp Trinity County |
120 | 0 | 0 | |
|
Caltrans-Chester Safety Rest Stop Plumas County |
120 | 0 | 0 | |
|
Church of the Redeemer Fresno County |
120 | 0 | 0 | |
|
Cold Spring Tavern Santa Barbara County |
120 | 2 | 0 | |
|
Concord MT Diablo Trailride Assoc. Contra Costa County |
120 | 0 | 0 | |
|
Corti Water System San Joaquin County |
120 | 0 | 0 | |
|
Csp Marconi Conference Center Marin County |
120 | 0 | 0 | |
|
Dolan RD Mwc Monterey County |
120 | 0 | 0 | |
|
Echo Lake Camp El Dorado County |
120 | 0 | 0 | |
|
Fisherman's Bend MHP Stanislaus County |
120 | 0 | 0 | |
|
Foxfield Riding School Ventura County |
120 | 0 | 0 | |
|
Fort Independence Fort Independence Reservation · County |
120 | 5 | 3 | |
|
Gas N Save Contra Costa County |
120 | 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.