All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Snowshoe Springs Assn. Calaveras County |
686 | 0 | 0 | |
|
Tranquillity Irrigation District Fresno County |
686 | 3 | 1 | |
|
Scotia Csd Humboldt County |
681 | 4 | 1 | |
|
Humboldt Bay Mwd Humboldt County |
680 | 0 | 0 | |
|
EL Camino Real WS #16 Monterey County |
679 | 0 | 0 | |
|
Lewiston Community Services District Trinity County |
677 | 2 | 1 | |
|
Fort Jones, Town of Siskiyou County |
673 | 0 | 0 | |
|
Whiskeytown Nra-Oak Bottom Shasta County |
673 | 0 | 0 | |
|
Tasco Spreckels Water Company Monterey County |
672 | 0 | 0 | |
|
Liberty -Yermo San Bernardino County |
671 | 0 | 0 | |
|
Alianza Charter School/wcsa Santa Cruz County |
670 | 1 | 1 | |
|
Lake Morena's Oak Shores Mwc San Diego County |
670 | 2 | 1 | |
|
June Mountain Ski Area Lower Mono County |
668 | 0 | 0 | |
|
June Mountain Ski Area Upper Mono County |
668 | 0 | 0 | |
|
Cal AM Walnut Grove Sacramento County |
667 | 0 | 0 | |
|
Loch Lomond Mutual Water CO Lake County |
666 | 1 | 1 | |
|
Brandeis Bardin Institute Ventura County |
665 | 2 | 1 | |
|
Edwards Afb Main Base Kern County |
661 | 2 | 0 | |
|
EL Dorado Mutual Water Co. Los Angeles County |
660 | 0 | 0 | |
|
Fry Creek / Observatory San Diego County |
660 | 0 | 0 | |
|
Kelly's Market San Bernardino County |
660 | 1 | 0 | |
|
Del Oro Traver District Tulare County |
657 | 1 | 0 | |
|
Gasquet C.s.d. Del Norte County |
657 | 0 | 0 | |
|
Grizzly Lake Csd-Delleker Plumas County |
657 | 2 | 0 | |
|
Lily of the Valley Mobile Village Los Angeles County |
657 | 0 | 0 | |
|
Rush Ranch Open Space Solano County |
656 | 0 | 0 | |
|
Big Bend Resort San Bernardino County |
655 | 0 | 0 | |
|
MP Mine Operations LLC San Bernardino County |
655 | 1 | 1 | |
|
Prunedale School WS Monterey County |
655 | 0 | 0 | |
|
Cdpr Four Rivers District-San Luis Creek Merced County |
653 | 0 | 0 | |
|
Placer Csa Sheridan Placer County |
653 | 0 | 0 | |
|
San Antonio Lake Park South WS Monterey County |
653 | 1 | 0 | |
|
Tokay Park Water CO Sacramento County |
653 | 0 | 0 | |
|
Andrade Border Station County |
650 | 1 | 0 | |
|
Bear River Tish Non Village Bear River - Tish Non Village · County |
650 | 2 | 0 | |
|
Cdfw Elkhorn Slough Ecological Reserve Monterey County |
650 | 1 | 0 | |
|
Coastal Christian School San Luis Obispo County |
650 | 0 | 0 | |
|
Eastside Union School District Los Angeles County |
650 | 1 | 1 | |
|
Hart Ransom Union School & District Stanislaus County |
650 | 0 | 0 | |
|
Jehovah's Witnesses Hall Sonoma County |
650 | 0 | 0 | |
|
Mesquite Creek County |
650 | 5 | 1 | |
|
Sunbeam Lake RV Resort Imperial County |
650 | 2 | 1 | |
|
Cal AM Water Company Chualar Monterey County |
647 | 0 | 0 | |
|
Pinnacles National Park Campground San Benito County |
647 | 0 | 0 | |
|
Woodville Farm Labor Center Tulare County |
646 | 0 | 0 | |
|
Oak Valley School Tulare County |
645 | 0 | 0 | |
|
Pleasantimes Mutual Water CO Contra Costa County |
644 | 0 | 0 | |
|
Sierra Enterprise Elementary School Sacramento County |
643 | 1 | 0 | |
|
Diamond a Mutual Water Company Sonoma County |
640 | 1 | 1 | |
|
Etaa Facilities LLC Madera County |
636 | 1 | 1 |
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.