All water systems in California
2,996 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Wildhaven Yosemite Water System Mariposa County |
100 | 0 | 0 | |
|
Wrightwood Country Club San Bernardino County |
100 | 0 | 0 | |
|
Yellow Jacket Campground El Dorado County |
100 | 1 | 0 | |
|
YMCA Camp Redwood Fresno County |
100 | 0 | 0 | |
|
Piazza Winery Napa County |
99 | 0 | 0 | |
|
Villa Robles Water System San Benito County |
98 | 3 | 2 | |
|
Sikh Temple Modesto-Ceres Stanislaus County |
97 | 0 | 0 | |
|
Wilbur Hot Springs Colusa County |
97 | 0 | 0 | |
|
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 | |
|
Minturn Huller Merced County |
95 | 0 | 0 | |
|
Rmrc-Lower Coffee Camp Day Use Tulare County |
95 | 0 | 0 | |
|
Santa Rosa Liquor and Deli Sonoma County |
95 | 0 | 0 | |
|
Tnf-Chapman CG Sierra County |
95 | 0 | 0 | |
|
Tnf-Indian Valley/rocky Rest CG Sierra County |
95 | 0 | 0 | |
|
Mayflower Park Riverside County |
94 | 1 | 0 | |
|
Lytton Springs Winery Sonoma County |
93 | 0 | 0 | |
|
Redwoods Main Water System Mariposa County |
93 | 0 | 0 | |
|
LE Cuvier Winery Cayucos · San Luis Obispo County |
92 | 0 | 0 | |
|
Leisure Time RV Park Mendocino County |
92 | 0 | 0 | |
|
Ebrpd Sunol Regional Wilderness Alameda County |
91 | 0 | 0 | |
|
Livingston Properties Merced County |
91 | 1 | 0 | |
|
The Madrones Mendocino County |
91 | 0 | 0 | |
|
Bridgeport Reservoir Marina and CG Mono County |
90 | 0 | 0 | |
|
Camp Timberwolf Plumas County |
90 | 0 | 0 | |
|
Historic Priest Station, LLC Tuolumne County |
90 | 2 | 0 | |
|
Mary Smith Campground Trinity County |
90 | 0 | 0 | |
|
Nick's Cove Marin County |
90 | 0 | 0 | |
|
Pnf Lighting Tree CG Plumas County |
90 | 1 | 0 | |
|
Prunedale Plaza WS Monterey County |
90 | 0 | 0 | |
|
Stan's Yolo Marina Yolo County |
90 | 1 | 0 | |
|
Sunnygem Hulling & Shelling Operations Kern County |
90 | 0 | 0 | |
|
Lovey's Landing Sutter County |
89 | 0 | 0 | |
|
Akal Travel Plaza Tulare County |
88 | 0 | 0 | |
|
Cuyama Orchards INC Kern County |
88 | 0 | 0 | |
|
Rmrc-Headquarters Campground Tulare County |
88 | 0 | 0 | |
|
Amador Harvest Inn Amador County |
87 | 0 | 0 | |
|
Big B's Travel Center #2 Tulare County |
87 | 0 | 0 | |
|
Hans Fahden Vineyards Sonoma County |
87 | 1 | 0 | |
|
Tri Counties Club San Luis Obispo County |
87 | 2 | 0 | |
|
Lee's Market Fresno County |
86 | 1 | 0 | |
|
Tips Roadside Sonoma County |
86 | 0 | 0 | |
|
Wolf Mountain Conf. Assn. Nevada County |
86 | 0 | 0 | |
|
Baldacci Family Vineyards Napa · Napa County |
85 | 0 | 0 | |
|
Cannery Landing Sacramento County |
85 | 1 | 0 | |
|
Fernbridge Cafe Humboldt County |
85 | 0 | 0 | |
|
Idyllwild Pines Camp Riverside County |
85 | 0 | 0 | |
|
Jeff Runquist Winery Amador County |
85 | 0 | 0 | |
|
Mono Hot Springs Resort Fresno County |
85 | 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.