All water systems in California
2,996 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Northstar Summit Deck & Grill Placer County |
2,000 | 0 | 0 | |
|
Pyramid Creek Trailhead El Dorado County |
2,000 | 0 | 0 | |
|
U.s. Army Corps-Lake Mendo (bushay Site) Mendocino County |
2,000 | 0 | 0 | |
|
Usfs-Crystal Lake B-13 Water Los Angeles County |
2,000 | 0 | 0 | |
|
Sierra Tahoe West Bowl El Dorado County |
1,900 | 2 | 0 | |
|
U.s. Army Corp New Hogan Calaveras County |
1,860 | 0 | 0 | |
|
Lake Siskiyou Campground Siskiyou County |
1,850 | 0 | 0 | |
|
Andrew Murray Vineyard Santa Barbara County |
1,815 | 0 | 0 | |
|
Pinnacles National Park-East District San Benito County |
1,811 | 1 | 1 | |
|
Chp Mission Grade Scales Pleasanton · Alameda County |
1,800 | 1 | 0 | |
|
Dp&r McArthur-Burney Falls SP Shasta County |
1,800 | 0 | 0 | |
|
Slavic Missionary Church INC Sacramento County |
1,800 | 0 | 0 | |
|
San Mateo County Memorial Park San Mateo County |
1,790 | 0 | 0 | |
|
Leavitt Campground Mono County |
1,778 | 0 | 0 | |
|
Caltrans Camp Roberts Rsra NB Monterey County |
1,750 | 1 | 0 | |
|
Brannan Island State Rec. Area Sacramento County |
1,622 | 0 | 0 | |
|
Whiskeytown Nra-Brandy Creek Shasta County |
1,582 | 0 | 0 | |
|
Pearsonville Water System Inyo County |
1,515 | 0 | 0 | |
|
Richardson Grove Sp-State Parks Humboldt County |
1,507 | 0 | 0 | |
|
Nps Prns Beaches Marin County |
1,505 | 0 | 0 | |
|
Nojoqui Falls County Park Santa Barbara County |
1,502 | 1 | 0 | |
|
Antlers Shell / Subway Shasta County |
1,500 | 0 | 0 | |
|
Cal Trans Buttonwillow Sfty Rsra Kern County |
1,500 | 0 | 0 | |
|
Camp Verdugo Oaks Boyscouts Los Angeles County |
1,500 | 0 | 0 | |
|
U.s. Army Corps-Lake Mendo (kyen Cmpgrd) Mendocino County |
1,500 | 0 | 0 | |
|
Joshua Tree Lake Rv/camp San Bernardino County |
1,458 | 0 | 0 | |
|
Csp-Mackerricher State Park Mendocino County |
1,416 | 0 | 0 | |
|
Big Bend Campground Mono County |
1,406 | 0 | 0 | |
|
Caltrans-Collier Rest Stop Siskiyou County |
1,400 | 0 | 0 | |
|
Usfs/dinkey Creek Campground Fresno County |
1,400 | 0 | 0 | |
|
Saddlebag Lake Campground Mono County |
1,384 | 0 | 0 | |
|
East Fork Campground Mono County |
1,365 | 0 | 0 | |
|
French Camp Campground Mono County |
1,365 | 0 | 0 | |
|
Crystal Springs CG Alpine County |
1,364 | 0 | 0 | |
|
Mojave River Forks Regional Park San Bernardino County |
1,356 | 1 | 0 | |
|
Rusack Vineyards Santa Barbara County |
1,327 | 1 | 0 | |
|
Usfs Old Isabella Auxiliary Dam WS Kern County |
1,320 | 0 | 0 | |
|
Caltrans Shandon Rest Stop San Luis Obispo County |
1,300 | 1 | 0 | |
|
Ellery Lake Campground Mono County |
1,225 | 0 | 0 | |
|
Nps-Devils Postpile Madera County |
1,220 | 0 | 0 | |
|
Hidden Valley Nature Center Riverside County |
1,210 | 0 | 0 | |
|
Self-Serve Petroleum Solano County |
1,210 | 0 | 0 | |
|
Csp Henry W. Coe State Park Santa Clara County |
1,205 | 0 | 0 | |
|
Nps Prns Lighthouse Marin County |
1,202 | 0 | 0 | |
|
Adventure Mtn Lodge El Dorado County |
1,200 | 0 | 0 | |
|
Nps Prns Glen and Wildcat Campgrounds Marin County |
1,200 | 0 | 0 | |
|
Shant Bhavan Punjabi Funeral Home Fresno · Fresno County |
1,200 | 1 | 0 | |
|
Starbucks San Joaquin County |
1,200 | 0 | 0 | |
|
Tnf-Logger & Stampede RC Sierra County |
1,200 | 0 | 0 | |
|
Valley Evangelical Free Church Solano County |
1,200 | 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.