All water systems in California
2,996 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Sierra Tahoe Grandview El Dorado County |
500 | 2 | 0 | |
|
Silver Lake Campground Amador County |
500 | 1 | 0 | |
|
Sommerville Almond Tree Owners Assn Fresno County |
500 | 0 | 0 | |
|
ST Joseph's Church Yolo County |
500 | 0 | 0 | |
|
The Anderson Cayucos · San Luis Obispo County |
500 | 0 | 0 | |
|
Usfs Wheeler Gorge Campground Ventura County |
500 | 0 | 0 | |
|
Usfs French Meadows North Shore Placer County |
500 | 0 | 0 | |
|
Usfs French Meadows South Shore Placer County |
500 | 0 | 0 | |
|
Valley Pacific Petroleum Services Santa Barbara County |
500 | 0 | 0 | |
|
Visalia Sales Yard Tulare County |
500 | 1 | 0 | |
|
Whitney Portal Inyo County |
500 | 0 | 0 | |
|
Yosemite Nps-Crane Flat Mariposa County |
500 | 0 | 0 | |
|
Hhw&p-O'shaughnessy Dam Cpd-Sfpuc San Francisco County |
495 | 0 | 0 | |
|
Rough Acres Foundation San Diego County |
495 | 1 | 0 | |
|
Agua Dulce Water System Los Angeles County |
493 | 0 | 0 | |
|
Angeles Shooting Ranges Los Angeles County |
490 | 0 | 0 | |
|
Tuff Campground Mono County |
489 | 0 | 0 | |
|
Riverland Resort San Bernardino County |
470 | 1 | 0 | |
|
Dwr-Monument Hill Restrooms Butte County |
468 | 0 | 0 | |
|
Newberry Mini Mart and Truck Stop San Bernardino County |
465 | 0 | 0 | |
|
Pence Vineyards Lompoc · Santa Barbara County |
463 | 0 | 0 | |
|
Fallen Leaf Mutual Water CO El Dorado County |
461 | 0 | 0 | |
|
Kennedy Grocery Riverside County |
458 | 1 | 0 | |
|
Cuyamaca SP Green Valley San Diego County |
455 | 0 | 0 | |
|
Delhi Kingdom Hall Merced County |
452 | 0 | 0 | |
|
Wind Wolves Preserve Kern County |
452 | 0 | 0 | |
|
Buttonwillow Raceway Park Classic Kern County |
451 | 0 | 0 | |
|
Clark System Trinity County |
450 | 0 | 0 | |
|
Lighthouse Marina Restaurant & Resort Sacramento County |
450 | 0 | 0 | |
|
Mother Truckers Water System Nevada City · Nevada County |
450 | 0 | 0 | |
|
Trinity Presbyterian Church Fresno County |
450 | 0 | 0 | |
|
Usda-Forest Service Princess Campground Fresno County |
450 | 0 | 0 | |
|
Yosemite Nps-Bridalveil Creek CG Mariposa County |
450 | 0 | 0 | |
|
Casini Ranch Campground Sonoma County |
442 | 0 | 0 | |
|
Convict Lake Campground Mono County |
440 | 0 | 0 | |
|
Hayward Flat Campground Trinity County |
440 | 0 | 0 | |
|
Usfs Beardsley Picnic Ground Tuolumne County |
432 | 0 | 0 | |
|
Csp-Pt. Cabrillo Light Station Shp Mendocino County |
430 | 0 | 0 | |
|
Albion River Campground Mendocino County |
425 | 0 | 0 | |
|
Dp&r Castle Crags SP Shasta County |
425 | 0 | 0 | |
|
Wente Scout Reservation Mendocino County |
422 | 0 | 0 | |
|
Csp Kirkwood Entrance Santa Cruz County |
421 | 0 | 0 | |
|
Csp-Manchester State Park Mendocino County |
420 | 0 | 0 | |
|
Sun Valley Packing Tulare County |
420 | 0 | 0 | |
|
Big Pine Flats Admin & Recreation San Bernardino County |
417 | 0 | 0 | |
|
Shingletown Store Water System Shasta County |
417 | 0 | 0 | |
|
Rancho Oso Santa Barbara County |
416 | 0 | 0 | |
|
Country Hills RV Park Riverside County |
415 | 0 | 0 | |
|
Fess Parker Winery Santa Barbara County |
415 | 0 | 0 | |
|
Sanborn-Skyline County Park Santa Clara County |
414 | 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.