All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Gizdich Home Ranch Santa Cruz County |
213 | 0 | 0 | |
|
Paradise Lake Mutual Water Co. Monterey County |
213 | 0 | 0 | |
|
Ridge Mutual Water Company Santa Cruz County |
213 | 1 | 1 | |
|
Camp ST Nicholas Water System Kern County |
212 | 1 | 0 | |
|
Canyon Creek Resort Yolo County |
212 | 0 | 0 | |
|
Hari's Market Tulare County |
212 | 1 | 0 | |
|
Mandala Water System Lake County |
212 | 0 | 0 | |
|
Olivet University Riverside County |
212 | 0 | 0 | |
|
Alview School Madera County |
211 | 0 | 0 | |
|
Del Oro Water Co. Hat Creek District Shasta County |
211 | 0 | 0 | |
|
Oak Trail Estates Santa Barbara County |
211 | 0 | 0 | |
|
Pine Grove Campground Mono County |
211 | 0 | 0 | |
|
Shasta Caverns Shasta County |
211 | 0 | 0 | |
|
Spv Water Company Los Angeles County |
211 | 0 | 0 | |
|
Calero County Park Santa Clara County |
210 | 0 | 0 | |
|
Camino Mobilehome Contra Costa County |
210 | 0 | 0 | |
|
Central Valley Eggs, LLC Wasco · Kern County |
210 | 1 | 1 | |
|
Cherry Valley Water Company Riverside County |
210 | 0 | 0 | |
|
Golden Sierra Estates_fka Mother Lode Tuolumne County |
210 | 2 | 1 | |
|
Metcalf Motorcycle County Park Santa Clara County |
210 | 0 | 0 | |
|
Moro RD WS #09 Monterey County |
210 | 1 | 0 | |
|
New Jerusalem School San Joaquin County |
210 | 0 | 0 | |
|
Nps-Potwisha Tulare County |
210 | 0 | 0 | |
|
Puresource Water, INC Santa Cruz County |
210 | 0 | 0 | |
|
Rancho Carrillo Mwc Riverside County |
210 | 0 | 0 | |
|
Saint Andrews Abbey Los Angeles County |
210 | 1 | 1 | |
|
Sierra Lakes County Water Dist Placer County |
210 | 0 | 0 | |
|
Westgate Petroleum Lakeport · Lake County |
210 | 0 | 0 | |
|
Big Sur Campground WS Monterey County |
209 | 0 | 0 | |
|
Cold Springs Main Cold Springs Rancheria · County |
209 | 7 | 2 | |
|
Bell Wine Cellars Napa · Napa County |
208 | 0 | 0 | |
|
Capell Valley Estates Napa County |
208 | 2 | 2 | |
|
James Court Water System Sonoma County |
208 | 1 | 1 | |
|
Lawndale Mutual Water Company Sonoma County |
208 | 1 | 1 | |
|
Rains Creek Water District Sonoma County |
208 | 0 | 0 | |
|
Saratoga Springs Retreat Center Lake County |
208 | 0 | 0 | |
|
Tucalota Springs R.v. Park Riverside County |
208 | 0 | 0 | |
|
Union Pacific Railroad Co.-Keene Water Kern County |
208 | 0 | 0 | |
|
Usfs Hirz Bay/dekkas/moore CR Shasta County |
208 | 0 | 0 | |
|
Cypress Community Church WS Monterey County |
207 | 0 | 0 | |
|
Elk County Water District Mendocino County |
207 | 1 | 1 | |
|
Golden State Water Co. Robbins Sutter County |
207 | 0 | 0 | |
|
Orland Estates Mobile H.p. Glenn County |
207 | 1 | 0 | |
|
Parrish Family Winery San Luis Obispo County |
207 | 0 | 0 | |
|
Scicon Tulare County |
207 | 0 | 0 | |
|
Atlas Business Park Tuolumne County |
206 | 1 | 0 | |
|
AV Thomas Produce, Inc. Merced County |
206 | 0 | 0 | |
|
Estero Mutual Marin County |
206 | 0 | 0 | |
|
Flight Ridge Mendocino County |
206 | 0 | 0 | |
|
Ivcsd Crescent Mills Plumas County |
206 | 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.