All water systems in California
2,996 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Bandy Canyon Ranch Corp San Diego County |
3,564 | 0 | 0 | |
|
Crowley Lake Campground (blm) Mono County |
3,562 | 0 | 0 | |
|
Csp-Salt Point State Park Sonoma County |
3,513 | 0 | 0 | |
|
Csp-Fort Ross State Park Sonoma County |
3,501 | 0 | 0 | |
|
Bear Valley Mountain Resort Alpine County |
3,500 | 0 | 0 | |
|
Caltrans-Lakehead Srra Shasta County |
3,500 | 0 | 0 | |
|
Mount Laguna Water System San Diego County |
3,500 | 0 | 0 | |
|
Mt. Shasta Ski Park Siskiyou County |
3,500 | 0 | 0 | |
|
Yosemite Nps-Mariposa Grove Madera County |
3,500 | 0 | 0 | |
|
Gibson Ranch County Park Sacramento County |
3,300 | 0 | 0 | |
|
Providence Mtns Sra San Bernardino County |
3,203 | 0 | 0 | |
|
Applewhite Campground San Bernardino County |
3,177 | 1 | 0 | |
|
Green Valley Campground San Bernardino County |
3,029 | 0 | 0 | |
|
Petite Pantry Inyo County |
3,012 | 0 | 0 | |
|
Victory Ranch Riverside County |
3,008 | 0 | 0 | |
|
Caltrans-Boron Rest Stop Water System Kern County |
3,000 | 0 | 0 | |
|
Smith Forks Water System Ventura County |
3,000 | 1 | 0 | |
|
Wild Water Adventures Fresno County |
3,000 | 1 | 0 | |
|
Nps-Pinewood Water System Tulare County |
2,900 | 0 | 0 | |
|
Nps-Sheep Creek Fresno County |
2,900 | 0 | 0 | |
|
Csp Hollister Hills Svra San Benito County |
2,719 | 0 | 0 | |
|
Caltrans-Red Bluff Rest-Nb Tehama County |
2,600 | 0 | 0 | |
|
Caltrans Camp Roberts Rsra SB Monterey County |
2,560 | 1 | 0 | |
|
Caltrans-O'brien Srra Shasta County |
2,550 | 0 | 0 | |
|
Kern Valley Airport Kern County |
2,507 | 0 | 0 | |
|
Millerton Sra Meadow Tank Hill Madera County |
2,506 | 0 | 0 | |
|
Jimmys One Stop San Joaquin County |
2,505 | 0 | 0 | |
|
Dierberg/star Lane Vineyard Santa Barbara County |
2,502 | 0 | 0 | |
|
Caltrans-Hillcrest Srra Shasta County |
2,500 | 0 | 0 | |
|
Caltrans-Red Bluff Rest-Sb Tehama County |
2,500 | 0 | 0 | |
|
Schoepe Scout Reservation at Lost Valley San Diego County |
2,500 | 0 | 0 | |
|
Yosemite Nps-Tuolumne Meadows Tuolumne County |
2,500 | 0 | 0 | |
|
Horton Creek Campground Inyo County |
2,405 | 0 | 0 | |
|
Terwilliger Association Riverside County |
2,401 | 0 | 0 | |
|
Riley's Farm San Bernardino County |
2,400 | 1 | 0 | |
|
Bullard's Bar Rec Fac Wtr Sys Yuba County |
2,208 | 0 | 0 | |
|
Jedediah Smith State Park Del Norte County |
2,208 | 0 | 0 | |
|
Lone Pine Campground Inyo County |
2,205 | 0 | 0 | |
|
Cal Trans C.v. Kane San Bernardino County |
2,200 | 1 | 0 | |
|
Diamond Valley Market Water Riverside County |
2,195 | 1 | 0 | |
|
Vega Vineyard and Farm Santa Barbara County |
2,022 | 0 | 0 | |
|
Camp Wawona Mariposa County |
2,010 | 1 | 0 | |
|
Koehler Winery Santa Barbara County |
2,008 | 0 | 0 | |
|
Buttonwillow Tiger Mart Kern County |
2,006 | 1 | 0 | |
|
Csp-Van Damme State Park Mendocino County |
2,004 | 0 | 0 | |
|
Cal Trans Desert Oasis San Bernardino County |
2,000 | 0 | 0 | |
|
Cal Trans Gaviota Rsr Santa Barbara County |
2,000 | 0 | 0 | |
|
Lee's Frontier Inyo County |
2,000 | 0 | 0 | |
|
Marysville Raceway Park Yuba County |
2,000 | 1 | 0 | |
|
Mobiland Camper Park San Diego County |
2,000 | 1 | 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.