All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Hidden Views MHP WS Monterey County |
65 | 0 | 0 | |
|
Kirkwood Campground Amador County |
65 | 2 | 0 | |
|
KJ Carneros Hills Winery Sonoma County |
65 | 0 | 0 | |
|
Latrobe Elementary School El Dorado County |
65 | 0 | 0 | |
|
Lds Church Mariposa Mariposa County |
65 | 0 | 0 | |
|
Loma Mar Mutual San Mateo County |
65 | 0 | 0 | |
|
Lone Pine Mutual Water Company Sonoma County |
65 | 0 | 0 | |
|
Lotus Pub El Dorado County |
65 | 1 | 0 | |
|
Monte Sereno Mutual Benefit Water San Luis Obispo County |
65 | 0 | 0 | |
|
Mountain View Cold Storage Tulare County |
65 | 2 | 1 | |
|
Murphy Hill WS #01 Monterey County |
65 | 1 | 1 | |
|
Newby Island Landfill, Republic Services Santa Clara County |
65 | 0 | 0 | |
|
Oak Glen Retreat San Bernardino County |
65 | 2 | 1 | |
|
Orchard School Santa Cruz County |
65 | 0 | 0 | |
|
Paso 360 San Luis Obispo County |
65 | 0 | 0 | |
|
Pine ST WS #01 Monterey County |
65 | 0 | 0 | |
|
Redding Odd Fellows Camp Trinity County |
65 | 1 | 0 | |
|
Rite of Passage/sierra Ridge Calaveras County |
65 | 1 | 1 | |
|
River RD WS #25 Monterey County |
65 | 2 | 1 | |
|
Schramsberg Winery Napa County |
65 | 0 | 0 | |
|
Sebastiani Vineyards Sonoma County |
65 | 0 | 0 | |
|
Spring Valley Heights Association INC Santa Clara County |
65 | 0 | 0 | |
|
Syngenta Seeds LLC Yolo County |
65 | 0 | 0 | |
|
Trap the (sws) Sacramento County |
65 | 0 | 0 | |
|
Usn Sere Camp Warner Springs San Diego County |
65 | 0 | 0 | |
|
Uvas Pines RV Park Santa Clara County |
65 | 0 | 0 | |
|
Vierra Meadows Mwc Monterey County |
65 | 0 | 0 | |
|
Wahl Family Water System Contra Costa County |
65 | 0 | 0 | |
|
Westerner Mobile Home Park Sacramento County |
65 | 0 | 0 | |
|
Yosemite's Scenic Wonders Mariposa County |
65 | 1 | 0 | |
|
American Legion Tract Resort Assoc El Dorado County |
64 | 0 | 0 | |
|
Capurro & Son WS Monterey County |
64 | 1 | 1 | |
|
Chateau Diana Sonoma County |
64 | 0 | 0 | |
|
Country Club County WD Merced County |
64 | 3 | 2 | |
|
Elm Court Fresno County |
64 | 4 | 3 | |
|
Frazier Nut Farms, Inc. Stanislaus County |
64 | 1 | 0 | |
|
Gracianna Winery Sonoma County |
64 | 0 | 0 | |
|
Harris Moran Seed Company Solano County |
64 | 0 | 0 | |
|
Humboldt Woodlands Mutual Butte County |
64 | 1 | 1 | |
|
JS West Milling CO Hilmar Ranch Merced County |
64 | 0 | 0 | |
|
Keenan Farms Inc. Kings County |
64 | 0 | 0 | |
|
Lake Shasta Lodge Shasta County |
64 | 0 | 0 | |
|
Laurel Community League Santa Cruz County |
64 | 2 | 1 | |
|
Lone Pine MHP Stanislaus County |
64 | 0 | 0 | |
|
Melita Heights Mutual Water Company Sonoma County |
64 | 2 | 2 | |
|
Mount Gilead Bible Conference Sonoma County |
64 | 1 | 1 | |
|
Palomino Estates Water Company Humboldt County |
64 | 4 | 3 | |
|
Pioneer Place Mws Monterey County |
64 | 0 | 0 | |
|
River Retreat Mutual Water Company Tulare County |
64 | 1 | 1 | |
|
Silver Creek Madera County |
64 | 1 | 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.