All water systems in California
2,996 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Csp-Jack London State Historic Park Sonoma County |
130 | 0 | 0 | |
|
Fish Lake CG Srnf Humboldt County |
130 | 0 | 0 | |
|
Grant Lake Marina Mono County |
130 | 0 | 0 | |
|
Norcal Adventure Area Yuba County |
130 | 0 | 0 | |
|
Quail Canyon Sea Los Angeles County |
130 | 0 | 0 | |
|
River Oaks Golf Club Sutter County |
130 | 0 | 0 | |
|
ST Anthony Retreat Center Tulare County |
130 | 1 | 0 | |
|
Triple S Ranch Sonoma County |
130 | 0 | 0 | |
|
Greene Acres Prop. O.a. Sierra County |
129 | 0 | 0 | |
|
Kings Inn Motel Tulare County |
129 | 0 | 0 | |
|
Maverik Fueling Station Riverside · Riverside County |
129 | 0 | 0 | |
|
Trillium Cafe and Inn Mendocino County |
129 | 0 | 0 | |
|
Camp EL Camino Pines Kern County |
128 | 0 | 0 | |
|
Ledson Winery and Vineyards Sonoma County |
128 | 0 | 0 | |
|
Milat Winery Napa County |
128 | 0 | 0 | |
|
California Vipassana Center Madera County |
127 | 0 | 0 | |
|
Duncans Mills Camping Club Sonoma County |
127 | 0 | 0 | |
|
Topaz Lake RV Park Mono County |
127 | 0 | 0 | |
|
Ancient Redwoods Resort Humboldt County |
126 | 0 | 0 | |
|
Arbuckle Golf Club Colusa County |
126 | 0 | 0 | |
|
Bear River Summer Home Tract Amador County |
126 | 1 | 0 | |
|
Burris Park Kings County |
126 | 0 | 0 | |
|
Empire Landing Campground-Sundance RV San Bernardino County |
126 | 2 | 0 | |
|
Arp Minimart Corp WS San Joaquin County |
125 | 0 | 0 | |
|
Bear Mountain Library/act Cntr Fresno County |
125 | 0 | 0 | |
|
Bear River Group Campground Amador County |
125 | 0 | 0 | |
|
Coast Gallery WS Monterey County |
125 | 0 | 0 | |
|
Countryside Mkt & Restrnt Comanche Kern County |
125 | 0 | 0 | |
|
Gerle Creek Campground El Dorado County |
125 | 0 | 0 | |
|
Grace Fellowship Church Amador County |
125 | 0 | 0 | |
|
Lake Fulmor Usfs Riverside County |
125 | 0 | 0 | |
|
Loon Lake Campground El Dorado County |
125 | 0 | 0 | |
|
Madera Hispanic Church Madera · Madera County |
125 | 1 | 0 | |
|
Malakoff Diggins Shp Nevada County |
125 | 0 | 0 | |
|
Moonstone Beach Trinidad Humboldt County |
125 | 0 | 0 | |
|
Packer Lake Lodge Sierra County |
125 | 1 | 0 | |
|
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 | |
|
Sierra Woods Lodge Placer County |
124 | 0 | 0 | |
|
Cdfa-Mountain Pass Jpoe Ais San Bernardino County |
123 | 1 | 0 | |
|
Podesta Packing Water System San Joaquin County |
123 | 0 | 0 | |
|
Boisset Buena Vista Winery Sonoma County |
122 | 0 | 0 | |
|
Cedar Spring Retreat Center Madera County |
122 | 1 | 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 | |
|
River Oasis Riverside County |
121 | 0 | 0 | |
|
Caltrans-Chester Safety Rest Stop Plumas County |
120 | 0 | 0 | |
|
Church of the Redeemer Fresno 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.