All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Studios 6 Suites Madera County |
508 | 2 | 0 | |
|
Tesoro 68137 Mendocino County |
508 | 0 | 0 | |
|
Anza Borrego SP Palm Canyon San Diego County |
507 | 0 | 0 | |
|
Cajon Pass Shell San Bernardino County |
507 | 0 | 0 | |
|
HI Sahara Oasis San Bernardino County |
507 | 1 | 0 | |
|
Hillside Christian Center Water System Napa County |
507 | 0 | 0 | |
|
North Tahoe Pud Dollar Cove Placer County |
507 | 0 | 0 | |
|
Antelope Valley Indian Museum State Park Los Angeles County |
506 | 0 | 0 | |
|
Bartlett Park Tulare County |
506 | 0 | 0 | |
|
Camp Tawonga Tuolumne County |
505 | 1 | 0 | |
|
Costajo Arco Ampm Kern County |
505 | 0 | 0 | |
|
Konocti Harbor Resort Lake County |
505 | 1 | 0 | |
|
Csp MT Tam Theatre Well Marin County |
504 | 0 | 0 | |
|
Heavenly Hills Christian Camp Tuolumne County |
504 | 1 | 0 | |
|
Krista Mutual Water Company Kern County |
504 | 0 | 0 | |
|
Csp Tomales Bay ST Park Marin County |
503 | 0 | 0 | |
|
Csp-Standish Hickey State Rec Area Mendocino County |
503 | 0 | 0 | |
|
Greengate Ranch & Vineyards County |
503 | 0 | 0 | |
|
Whitewater Preserve Riverside County |
503 | 0 | 0 | |
|
Csp-Wrights Beach State Park Sonoma County |
502 | 0 | 0 | |
|
Plaskett Creek Campgrounds WS Monterey County |
501 | 2 | 1 | |
|
Annett's Mono Village Mono County |
500 | 0 | 0 | |
|
Arroyo Seco Rec WS Monterey County |
500 | 0 | 0 | |
|
California Resources Elk Hills Kern County |
500 | 0 | 0 | |
|
Camp Mather Tuolumne County |
500 | 1 | 0 | |
|
Campo Hills-County Public Works Wastewtr San Diego County |
500 | 0 | 0 | |
|
Chico Eastside Little League Butte County |
500 | 1 | 0 | |
|
Circle Oaks Water District Napa County |
500 | 0 | 0 | |
|
Cline Cellars Sonoma County |
500 | 0 | 0 | |
|
Coyote Valley RV Resort Santa Clara County |
500 | 0 | 0 | |
|
Crows Landing Comm Svc District Stanislaus County |
500 | 2 | 1 | |
|
Csp-Mendocino Headlands-Sea Arch Mendocino County |
500 | 0 | 0 | |
|
Defense Distrib. Depot, Sharpe Site San Joaquin County |
500 | 0 | 0 | |
|
Diaz Lake Campground Inyo County |
500 | 1 | 0 | |
|
Echo Lodge Resort San Bernardino County |
500 | 0 | 0 | |
|
Golden Era Productions Riverside County |
500 | 0 | 0 | |
|
Growers Service Assn WS (ice) Monterey County |
500 | 2 | 2 | |
|
Harney Lane Migrant Center WS San Joaquin County |
500 | 1 | 1 | |
|
Hearst Memorial State Beach San Luis Obispo County |
500 | 0 | 0 | |
|
Helwig Winery Amador County |
500 | 0 | 0 | |
|
Jalapenos Water System El Dorado County |
500 | 0 | 0 | |
|
Jehovah's Witness Sierra Vista Cong Stanislaus County |
500 | 0 | 0 | |
|
Kingdom Hall (fallon Rd) San Benito County |
500 | 0 | 0 | |
|
Kings River Elementary School Tulare County |
500 | 0 | 0 | |
|
Kings River Packing Company Fresno County |
500 | 1 | 0 | |
|
Kirkwood Sunrise Grill Alpine County |
500 | 0 | 0 | |
|
Knoll Enterprises San Bernardino County |
500 | 6 | 2 | |
|
Lake Almanor Country Club Mwc Plumas County |
500 | 1 | 1 | |
|
Lake Isabella Community Services Dist Kern County |
500 | 0 | 0 | |
|
Lancaster National Soccer Center Lancaster · Los Angeles County |
500 | 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.