All water systems in California
2,996 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Terribles #412 County |
185,181 | 0 | 0 | |
|
Jalama Beach Park Santa Barbara County |
120,017 | 1 | 0 | |
|
Lake Cachuma County Park Santa Barbara County |
40,019 | 0 | 0 | |
|
Aguanga Market Water System Riverside County |
36,012 | 0 | 0 | |
|
Pokonobe Lodge Restaurant/store Mono County |
35,000 | 0 | 0 | |
|
Robinson Creek Campground Mono County |
34,742 | 0 | 0 | |
|
Boulder Creek Trailer Park Inyo County |
30,000 | 0 | 0 | |
|
San Diego Mountain Lodge San Diego County |
26,641 | 3 | 0 | |
|
Antelope Valley Poppy Reserve State Park Los Angeles County |
25,007 | 0 | 0 | |
|
LA Cocina Riverside County |
24,524 | 0 | 0 | |
|
Csp-Fremont Peak San Benito County |
22,217 | 0 | 0 | |
|
South Bay Rod & Gun Club Inc. San Diego County |
18,900 | 1 | 0 | |
|
Yuba County Motorplex Yuba County |
18,000 | 0 | 0 | |
|
Bishop Creek Chevron Bishop · Inyo County |
16,793 | 0 | 0 | |
|
Caltrans-Maxwell Reststops Colusa County |
15,000 | 0 | 0 | |
|
Lupine Bass Lake Madera County |
11,930 | 0 | 0 | |
|
Tuttle Creek Campground Inyo County |
11,908 | 0 | 0 | |
|
Shasta District Fair Shasta County |
10,200 | 1 | 0 | |
|
Anza Valley Business Riverside County |
10,014 | 1 | 0 | |
|
New 99 Speedway Water System San Joaquin County |
10,000 | 0 | 0 | |
|
Anza Community Hall Riverside County |
9,595 | 0 | 0 | |
|
Ebrpd del Valle Regional Park Alameda County |
9,024 | 0 | 0 | |
|
Brecon Estate San Simeon · San Luis Obispo County |
9,012 | 0 | 0 | |
|
33rd District Agricultural Association San Benito County |
9,000 | 0 | 0 | |
|
Gray Lodge Check Station Butte County |
8,000 | 0 | 0 | |
|
Caltrans-Willows Reststop-Nb Glenn County |
7,500 | 0 | 0 | |
|
Caltrans-Willows Reststop-Sb Glenn County |
7,500 | 0 | 0 | |
|
Cherry Auction Fresno County |
7,000 | 0 | 0 | |
|
Caltrans, Cactus City Rest Area Indio · Riverside County |
6,800 | 0 | 0 | |
|
Cal Trans Erreca Rest Area Merced County |
6,150 | 0 | 0 | |
|
IV Desert Museum Society Inc. Imperial County |
6,110 | 1 | 0 | |
|
Caltrans, Whitewater Rest Area Riverside County |
6,000 | 1 | 0 | |
|
Soledad Mission WS Monterey County |
6,000 | 0 | 0 | |
|
Camp Fresno Water System Fresno County |
5,600 | 0 | 0 | |
|
Valley Auto Water Riverside County |
5,215 | 0 | 0 | |
|
Hope Valley CG Alpine County |
5,128 | 0 | 0 | |
|
Willow Springs Raceway Kern County |
5,022 | 0 | 0 | |
|
Famoso Raceway, Smokers Inc. Kern County |
5,000 | 0 | 0 | |
|
Trumbull Lake Campground Mono County |
4,859 | 0 | 0 | |
|
Hanna Flats Campground San Bernardino County |
4,850 | 0 | 0 | |
|
Bishop Creek System Inyo County |
4,839 | 0 | 0 | |
|
Jacumba Chevron and Shell San Diego County |
4,520 | 0 | 0 | |
|
Jacumba Valley Ranch Water Company San Diego County |
4,520 | 1 | 0 | |
|
Peppery Bar and Grill, the Tuolumne County |
4,500 | 1 | 0 | |
|
Camp Far West Resort Yuba County |
4,012 | 0 | 0 | |
|
Mataguay Scout Reservation San Diego County |
4,000 | 1 | 0 | |
|
Yosemite Nps-Glacier Point Mariposa County |
4,000 | 0 | 0 | |
|
Hunter Hill Safety Roadside Rest Area Solano County |
3,707 | 0 | 0 | |
|
Blm-Briceburg Water System Mariposa County |
3,609 | 1 | 0 | |
|
Grosso Kresser Winery San Simeon · San Luis Obispo County |
3,606 | 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 still 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. Retrieved from ECHO on Oct 11, 2026.