All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Hardwick Water Company Kings County |
69 | 1 | 1 | |
|
Harmony Haven Riverside County |
69 | 0 | 0 | |
|
Hartnell RD WS #1 Monterey County |
69 | 0 | 0 | |
|
Lassen Vnp Headquarters Tehama County |
69 | 1 | 0 | |
|
Leafwood Community WA Monterey County |
69 | 1 | 1 | |
|
Lopez Project San Luis Obispo County |
69 | 1 | 0 | |
|
Rod McLellan Botanicals WS Monterey County |
69 | 1 | 0 | |
|
Rosa Morada Mutual Water Company San Benito County |
69 | 0 | 0 | |
|
San Vicente Mwc Monterey County |
69 | 0 | 0 | |
|
Snelling Merced Falls School Merced County |
69 | 0 | 0 | |
|
Sunnyside Estates Water System San Joaquin County |
69 | 0 | 0 | |
|
Tioga Gas Mart Mono County |
69 | 0 | 0 | |
|
Westside Harvesting Fresno County |
69 | 1 | 0 | |
|
Auerbach Farms San Diego County |
68 | 0 | 0 | |
|
Calvary Church INC WS Monterey County |
68 | 1 | 1 | |
|
Eagle Lake RV Park Lassen County |
68 | 0 | 0 | |
|
Indian Hills Ranch Campground Kern County |
68 | 0 | 0 | |
|
Oak Grove Complex San Diego County |
68 | 0 | 0 | |
|
Parcher's Resort Inyo County |
68 | 0 | 0 | |
|
Pine Springs Ranch Riverside County |
68 | 1 | 0 | |
|
Pinebrook Community Water Well Kern County |
68 | 1 | 1 | |
|
Quintette Service Corp Water El Dorado County |
68 | 0 | 0 | |
|
Rancho Villanueva LLC County |
68 | 5 | 1 | |
|
Santa Teresa Meadows Water Company Santa Clara County |
68 | 0 | 0 | |
|
Sbragia Winery Sonoma County |
68 | 0 | 0 | |
|
Sierra Meadows Kern County |
68 | 0 | 0 | |
|
Toledo MHP County |
68 | 5 | 3 | |
|
Usfs Yolla Bolla Corp Yard Shasta County |
68 | 0 | 0 | |
|
Zonneveld Dairy Cedar Fresno County |
68 | 2 | 1 | |
|
Beach Creek Mobile Home Park Humboldt County |
67 | 1 | 1 | |
|
Calistoga Farm Worker Center Napa County |
67 | 0 | 0 | |
|
Camp Tahquitz San Bernardino County |
67 | 1 | 0 | |
|
Colusa Northern System County |
67 | 0 | 0 | |
|
Gold Rush Mobile Home Park Tuolumne County |
67 | 1 | 0 | |
|
Grays Meadow Campground Inyo County |
67 | 1 | 0 | |
|
LA Tierra Heights Mutual Napa County |
67 | 2 | 1 | |
|
Mary Lou Mobile Home Park Fresno County |
67 | 0 | 0 | |
|
Mineral Mountain Mutual Water Calaveras County |
67 | 1 | 1 | |
|
Morningside Mobilehome Park Stanislaus County |
67 | 0 | 0 | |
|
Moro Cojo Mwa Monterey County |
67 | 2 | 1 | |
|
Pigeon Point Hostel San Mateo County |
67 | 1 | 1 | |
|
Sandy Point Mobile Home Park Contra Costa County |
67 | 2 | 2 | |
|
So. Silver Lake Homeowners Amador County |
67 | 0 | 0 | |
|
Specialty Minerals INC San Bernardino County |
67 | 0 | 0 | |
|
ST Clare's Retreat Santa Cruz County |
67 | 0 | 0 | |
|
The Oaks Los Angeles County |
67 | 0 | 0 | |
|
Brown's Owens River Campground Mono County |
66 | 0 | 0 | |
|
C21 Anza Riverside County |
66 | 0 | 0 | |
|
Doubletree Ranch Water System Contra Costa County |
66 | 0 | 0 | |
|
Ebrpd Little Hills Contra Costa County |
66 | 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.