All water systems in California
2,996 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Smk Chevron San Joaquin County |
1,000 | 0 | 0 | |
|
ST Maria Goretti Parish (sws) Sacramento County |
1,000 | 1 | 0 | |
|
Sue-Meg Sp-State Parks Humboldt County |
1,000 | 0 | 0 | |
|
The Pub Water System El Dorado County |
1,000 | 0 | 0 | |
|
Usbr-Tuttletown Rec Area Tuolumne County |
1,000 | 0 | 0 | |
|
Yosemite Nps-Badger Pass Mariposa County |
1,000 | 0 | 0 | |
|
Gold Bluffs Beach Cg-State Parks Humboldt County |
998 | 0 | 0 | |
|
Rotten Robbie Lake County |
992 | 0 | 0 | |
|
Montana de Oro State Park San Luis Obispo County |
990 | 1 | 0 | |
|
Caltrans Phillip S. Raine Sfty Rsra NB Tulare County |
980 | 0 | 0 | |
|
Rancho Seco Park Sacramento County |
968 | 1 | 0 | |
|
Lake Piru Park Uwcd Ventura County |
960 | 0 | 0 | |
|
Gatehouse Tasting Room at Bien Nacido Santa Barbara County |
950 | 0 | 0 | |
|
Cisco Grove Campground & RV Park Placer County |
920 | 0 | 0 | |
|
EL Capitan Beach State Park Santa Barbara County |
915 | 0 | 0 | |
|
Chris Flat Campground Mono County |
910 | 0 | 0 | |
|
Usfs/rancheria Campground Fresno County |
906 | 0 | 0 | |
|
Nps-Dorst CG Tulare County |
900 | 0 | 0 | |
|
Usfs/dorabelle Campground Fresno County |
900 | 0 | 0 | |
|
Usfs Tillie Creek Live Oaks Campgrounds Kern County |
865 | 0 | 0 | |
|
Refugio State Beach Santa Barbara County |
857 | 0 | 0 | |
|
Joshua Tree NP Cottonwood Springs Riverside County |
856 | 0 | 0 | |
|
Forks Resort Madera County |
853 | 0 | 0 | |
|
Camp Lotus Water System El Dorado County |
850 | 1 | 0 | |
|
William Heise County Park San Diego County |
850 | 1 | 0 | |
|
Sacramento Nat. Wildlife Refuge Glenn County |
824 | 0 | 0 | |
|
Csp Rancho del Oso Santa Cruz County |
822 | 0 | 0 | |
|
1000 Trails / Soledad Canyon Preserve Los Angeles County |
812 | 1 | 0 | |
|
Usfs-Jackson Lake V-4 Los Angeles County |
805 | 0 | 0 | |
|
Immanuel Sports Complex Fresno County |
804 | 1 | 0 | |
|
Csp-J.p. Burns Park Monterey County |
802 | 0 | 0 | |
|
Chico Grange #486 Butte County |
800 | 0 | 0 | |
|
Church of Jesus Christ of Lds (sws) Sacramento County |
800 | 1 | 0 | |
|
Plumas-Eureka S.p. Plumas County |
800 | 0 | 0 | |
|
South Yuba River State Park Nevada County |
800 | 0 | 0 | |
|
Shady Cove San Bernardino County |
789 | 0 | 0 | |
|
Yosemite Nps-Arch Rock Mariposa County |
778 | 0 | 0 | |
|
Hurkey Creek Riv. Co. Parks Riverside County |
756 | 1 | 0 | |
|
Folsom Lake Sra Peninsula Campground El Dorado County |
751 | 0 | 0 | |
|
Bsa-Camp Whitsett Tulare County |
750 | 0 | 0 | |
|
Los Parientes Butte County |
750 | 0 | 0 | |
|
Richardson Grove Campground & RV Park Humboldt County |
750 | 0 | 0 | |
|
Usfs/deer Creek Campground Fresno County |
750 | 0 | 0 | |
|
Navarra Water System San Joaquin County |
730 | 0 | 0 | |
|
Plasse's Resort Amador County |
730 | 1 | 0 | |
|
Kingdom Hall of Jehovah S Witnesses Fresno County |
720 | 1 | 0 | |
|
Big Trees Campground Inyo County |
719 | 0 | 0 | |
|
Coso Junction Ranch Store Inyo County |
715 | 0 | 0 | |
|
KOA Petaluma Sonoma County |
713 | 0 | 0 | |
|
Csp Ano Nuevo State Park San Mateo County |
709 | 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.