All water systems in California
2,996 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Urj Camp Newman Sonoma County |
705 | 0 | 0 | |
|
Moonlight Packing Company Plant 7 Fresno County |
703 | 0 | 0 | |
|
Black Butte Lake, Buckhorn Ra, Uscoe Tehama County |
700 | 0 | 0 | |
|
Rainbo Beach San Bernardino County |
700 | 2 | 0 | |
|
Spartan Veterinary Services Riverside County |
700 | 1 | 0 | |
|
Cuyamaca SP Paso Picacho San Diego County |
691 | 0 | 0 | |
|
EL Camino Real WS #16 Monterey County |
679 | 0 | 0 | |
|
Whiskeytown Nra-Oak Bottom Shasta County |
673 | 0 | 0 | |
|
June Mountain Ski Area Lower Mono County |
668 | 0 | 0 | |
|
June Mountain Ski Area Upper Mono County |
668 | 0 | 0 | |
|
Fry Creek / Observatory San Diego County |
660 | 0 | 0 | |
|
Kelly's Market San Bernardino County |
660 | 1 | 0 | |
|
Rush Ranch Open Space Solano County |
656 | 0 | 0 | |
|
Big Bend Resort San Bernardino County |
655 | 0 | 0 | |
|
Cdpr Four Rivers District-San Luis Creek Merced County |
653 | 0 | 0 | |
|
San Antonio Lake Park South WS Monterey County |
653 | 1 | 0 | |
|
Cdfw Elkhorn Slough Ecological Reserve Monterey County |
650 | 1 | 0 | |
|
Jehovah's Witnesses Hall Sonoma County |
650 | 0 | 0 | |
|
Pinnacles National Park Campground San Benito County |
647 | 0 | 0 | |
|
Kings River RV Resort, LLC Tulare County |
624 | 0 | 0 | |
|
Mt. Madonna County Park Santa Clara County |
621 | 0 | 0 | |
|
Moonlight Packing Co. LLC Plant 8 Fresno County |
620 | 0 | 0 | |
|
Whiskeytown Nra-Whiskey Creek Shasta County |
616 | 0 | 0 | |
|
Usfs Clark Fork Campd Tuolumne County |
612 | 1 | 0 | |
|
Csp-Armstrong Redwoods State Reserve Sonoma County |
611 | 0 | 0 | |
|
Lassen Vnp Manzanita Lake Tehama County |
606 | 0 | 0 | |
|
River Lodge Resort San Bernardino County |
602 | 0 | 0 | |
|
Caltrans-Grass Lake Rest Stop Siskiyou County |
600 | 0 | 0 | |
|
Grand Island Mansion Sacramento County |
600 | 1 | 0 | |
|
Rodeway Inn San Joaquin County |
600 | 0 | 0 | |
|
Stagecoach Trails RV Resort San Diego County |
600 | 2 | 0 | |
|
Csp-Bothe-Napa Valley State Park Napa County |
586 | 0 | 0 | |
|
Seventh Day Adventist Camp Santa Cruz County |
578 | 0 | 0 | |
|
Usfs/vermillion Campground Fresno County |
575 | 1 | 0 | |
|
Mid MC Swain Rec Area Mariposa County |
573 | 0 | 0 | |
|
Bear River Lake Resort Amador County |
571 | 2 | 0 | |
|
Apple Market Two Riverside County |
561 | 0 | 0 | |
|
Van Duzen Humboldt Co. Parks Humboldt County |
551 | 0 | 0 | |
|
LE Trianon Resort Lake County |
539 | 0 | 0 | |
|
Woodward Reservoir Water System Stanislaus County |
537 | 0 | 0 | |
|
Wsl Surf Ranch Kings County |
535 | 0 | 0 | |
|
Menf-Fouts Springs CG Colusa County |
531 | 0 | 0 | |
|
United Pacific #0251 Madera County |
530 | 0 | 0 | |
|
Windmill Resort San Bernardino County |
530 | 0 | 0 | |
|
Deloro Valley Water System Tuolumne County |
528 | 2 | 0 | |
|
Heavenly Ski Gondola El Dorado County |
520 | 1 | 0 | |
|
Heavenly Ski Sky Deck El Dorado County |
520 | 0 | 0 | |
|
Usfs Paradise Cove Campground Kern County |
520 | 0 | 0 | |
|
Rancho Alegre Santa Barbara County |
519 | 0 | 0 | |
|
Circle V Ranch Camp Santa Barbara County |
515 | 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.