All water systems in California
2,996 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Rio del Colorado San Bernardino County |
515 | 0 | 0 | |
|
Indian Creek Golf Course Placer County |
512 | 0 | 0 | |
|
Madera District Fair Madera County |
512 | 0 | 0 | |
|
Uvas Canyon County Park Santa Clara County |
512 | 0 | 0 | |
|
Burger King #9310 San Bernardino County |
510 | 1 | 0 | |
|
Jenness Park Christian Camp Tuolumne County |
508 | 1 | 0 | |
|
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 | |
|
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 | |
|
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 | |
|
Camp Mather Tuolumne County |
500 | 1 | 0 | |
|
Chico Eastside Little League Butte County |
500 | 1 | 0 | |
|
Csp-Mendocino Headlands-Sea Arch Mendocino County |
500 | 0 | 0 | |
|
Diaz Lake Campground Inyo County |
500 | 1 | 0 | |
|
Echo Lodge Resort San Bernardino County |
500 | 0 | 0 | |
|
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 | |
|
Kirkwood Sunrise Grill Alpine County |
500 | 0 | 0 | |
|
Lancaster National Soccer Center Lancaster · Los Angeles County |
500 | 0 | 0 | |
|
Marysville Flea Market Yuba County |
500 | 1 | 0 | |
|
Mendocino County Fairgrounds Mendocino County |
500 | 0 | 0 | |
|
Millpond Recreation Area Inyo County |
500 | 1 | 0 | |
|
Mohi at the Grove San Benito County |
500 | 0 | 0 | |
|
Mystery Spot Snack Shack Santa Cruz County |
500 | 0 | 0 | |
|
Oak Tree Mountain San Bernardino County |
500 | 1 | 0 | |
|
Pilot Knob RV Resort Imperial County |
500 | 0 | 0 | |
|
Prairie Creek Sp-State Parks Humboldt County |
500 | 0 | 0 | |
|
River Oak Grace-Water System Stanislaus County |
500 | 1 | 0 | |
|
River Oaks/kingdom Hall Stanislaus County |
500 | 0 | 0 | |
|
Sierra Pines Church Madera · Madera 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.