All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Flux River Resort Trinity County |
34 | 0 | 0 | |
|
Italics Winery Napa County |
34 | 0 | 0 | |
|
J M Sims Water Supply San Luis Obispo County |
34 | 0 | 0 | |
|
Larkin Woods Mutual Water Company Sonoma County |
34 | 0 | 0 | |
|
Madrona Manor Sonoma County |
34 | 2 | 0 | |
|
Mesa Hills Mutual Water Company Santa Barbara County |
34 | 0 | 0 | |
|
Rancho Colorado WS Tehama County |
34 | 2 | 2 | |
|
Reforestation Technologies International Santa Clara County |
34 | 1 | 1 | |
|
Richmond Park Resort Lake County |
34 | 0 | 0 | |
|
Shadybrook Estates Winery Napa County |
34 | 0 | 0 | |
|
Sherman Island Marina Sacramento County |
34 | 1 | 0 | |
|
Sonoma County Pub Works-Central Landfill Sonoma County |
34 | 1 | 1 | |
|
Sunny Road Water System San Joaquin County |
34 | 1 | 0 | |
|
Tahoe Mountain Inn El Dorado County |
34 | 0 | 0 | |
|
Tehachapi Cummings County Water District Kern County |
34 | 0 | 0 | |
|
UC Elkus Ranch San Mateo County |
34 | 0 | 0 | |
|
Aperture Cellars Sonoma County |
33 | 0 | 0 | |
|
Arlington Heights MHP Plumas County |
33 | 0 | 0 | |
|
Aromas Hills Mutual Water Association San Benito County |
33 | 1 | 0 | |
|
Blu-In Cafe Imperial County |
33 | 1 | 0 | |
|
Boisset de Loach Winery Sonoma County |
33 | 0 | 0 | |
|
Camp Scheideck Ventura County |
33 | 1 | 1 | |
|
Carson River Resort Alpine County |
33 | 0 | 0 | |
|
Costanoa Campground San Mateo County |
33 | 1 | 0 | |
|
Desotec US LLC Tehama County |
33 | 1 | 1 | |
|
Ellman Family Winery Napa County |
33 | 0 | 0 | |
|
Fernwood WS Monterey County |
33 | 1 | 0 | |
|
Fort Ross Lodge, LLC Sonoma County |
33 | 0 | 0 | |
|
Gazos Creek Beach House San Mateo County |
33 | 0 | 0 | |
|
Holland Market Yolo County |
33 | 0 | 0 | |
|
Holliday Rock Plant #2 Kern County |
33 | 0 | 0 | |
|
Juanita Court Mutual Water Tehama County |
33 | 1 | 0 | |
|
LA Honda Center San Mateo County |
33 | 0 | 0 | |
|
Lincoln Chan-Home Ranch Sacramento County |
33 | 1 | 1 | |
|
Mission Creek Preserve Riverside County |
33 | 0 | 0 | |
|
Moonstone Heights Mwa Humboldt County |
33 | 1 | 0 | |
|
Mountain View Plaza Water System Shasta County |
33 | 0 | 0 | |
|
New Camaldoli Hermitage WS Monterey County |
33 | 1 | 1 | |
|
New Legend Logistics Kern County |
33 | 0 | 0 | |
|
Opal Fry and Son Kern County |
33 | 0 | 0 | |
|
Palomar Christian Conference Center San Diego County |
33 | 1 | 0 | |
|
Quintessa Winery Water System St. Helena · Napa County |
33 | 0 | 0 | |
|
Rancho Seco Inc. Water System Kern County |
33 | 1 | 1 | |
|
Rankin Ranch Kern County |
33 | 0 | 0 | |
|
Royal Oaks Market WS Monterey County |
33 | 0 | 0 | |
|
Silver Oak Wine Cellars LLC Sonoma County |
33 | 0 | 0 | |
|
Sonoma Mountain Zen Center Sonoma County |
33 | 0 | 0 | |
|
Speedway Sonoma LLC Sonoma County |
33 | 0 | 0 | |
|
UC Desert Research and Extension Center Imperial County |
33 | 2 | 0 | |
|
Village Apartments Tulare County |
33 | 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.