All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Adelaida Vineyards & Winery San Simeon · San Luis Obispo County |
27 | 1 | 0 | |
|
Alexander Valley Acres Water Company Sonoma County |
27 | 0 | 0 | |
|
Alexander Valley Store & Bar Sonoma County |
27 | 0 | 0 | |
|
All Saints Campground WS Monterey County |
27 | 0 | 0 | |
|
Bella Grace Vineyards Plymouth · Amador County |
27 | 1 | 0 | |
|
Belmont Temperance Property Water System Fresno County |
27 | 2 | 0 | |
|
Biddle Regional County Park San Luis Obispo County |
27 | 0 | 0 | |
|
Blm San Joaquin River Gorge Fresno County |
27 | 1 | 0 | |
|
Bullfrog Landing Marina San Joaquin County |
27 | 0 | 0 | |
|
Capay Open Space Park Yolo County |
27 | 0 | 0 | |
|
Cedar Lodge Motel Plumas County |
27 | 0 | 0 | |
|
Coyote Valley Sporting Clays Santa Clara County |
27 | 1 | 1 | |
|
David Bruce Winery Santa Cruz County |
27 | 1 | 0 | |
|
Days End RV Park Lassen County |
27 | 0 | 0 | |
|
Del Dotto Winery Napa County |
27 | 0 | 0 | |
|
Dorabelle Mutual Water Company Fresno County |
27 | 0 | 0 | |
|
Driftwood Mobilehome Park Fresno County |
27 | 0 | 0 | |
|
Field Stone Winery Sonoma County |
27 | 0 | 0 | |
|
Finleys San Joaquin County |
27 | 0 | 0 | |
|
Furthermore Wines Water System Sonoma County |
27 | 0 | 0 | |
|
Harmony Water Works San Luis Obispo County |
27 | 0 | 0 | |
|
Hay Kingdom Winters · Yolo County |
27 | 0 | 0 | |
|
Hot Creek Ranch Mono County |
27 | 0 | 0 | |
|
Houseboat Mini Mart Tuolumne County |
27 | 1 | 0 | |
|
Humane Society of Sonoma County Sonoma County |
27 | 0 | 0 | |
|
Jarvis Vineyard Napa County |
27 | 1 | 0 | |
|
Jasmine Vineyards Cold Storage Delano · Kern County |
27 | 1 | 1 | |
|
Kandola Farms Produce, Inc. Merced County |
27 | 0 | 0 | |
|
Karah Estate Winery Sonoma County |
27 | 1 | 1 | |
|
Lake Success Mobile Lodge Tulare County |
27 | 1 | 1 | |
|
Lander Veterinary Clinic Stanislaus County |
27 | 0 | 0 | |
|
Latin Market 2 Mono County |
27 | 0 | 0 | |
|
Los Prietos Improvement Association Santa Barbara County |
27 | 0 | 0 | |
|
McHenry Business Park Stanislaus County |
27 | 2 | 1 | |
|
Mendocino Grove Mendocino County |
27 | 0 | 0 | |
|
Mendocino Inn and Farm a Mendocino County |
27 | 0 | 0 | |
|
Mendocino Inn and Farm B Mendocino County |
27 | 0 | 0 | |
|
Mitchell's Avenue E Mobile Home Park Los Angeles County |
27 | 2 | 1 | |
|
North Kranenburg WS Kern County |
27 | 0 | 0 | |
|
Nps Death Valley, Grapevine RS Inyo County |
27 | 0 | 0 | |
|
Oasis Cafe WS Monterey County |
27 | 0 | 0 | |
|
Peju Province Napa County |
27 | 1 | 1 | |
|
Pierpoint Springs Water Co. Tulare County |
27 | 1 | 1 | |
|
Pine Hill Terrace Mobile Home Park Sonoma County |
27 | 1 | 0 | |
|
Quaker Center Santa Cruz County |
27 | 0 | 0 | |
|
Schweikart Water System Kern County |
27 | 0 | 0 | |
|
Tarditi Rentals Water San Joaquin County |
27 | 1 | 1 | |
|
White Rock Club WS Monterey County |
27 | 1 | 0 | |
|
4937 Beckwith Water System Stanislaus County |
26 | 0 | 0 | |
|
5801 McHenry Ave Stanislaus County |
26 | 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.