All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Indian Creek Csd Inyo County |
1,030 | 0 | 0 | |
|
Los Angeles Cwwd 40, Reg. 39-Rock Creek Los Angeles County |
1,030 | 0 | 0 | |
|
Kenwood Village Water Company (puc) Sonoma County |
1,029 | 0 | 0 | |
|
Averydale Mwc Los Angeles County |
1,026 | 1 | 0 | |
|
McSwain Elementary School Merced County |
1,025 | 0 | 0 | |
|
LA Purisima Golf Course Santa Barbara County |
1,024 | 1 | 0 | |
|
Lake Solano Park Solano County |
1,019 | 0 | 0 | |
|
Peggy Sue's Diner San Bernardino County |
1,019 | 0 | 0 | |
|
Cws Southlake System Kern County |
1,015 | 0 | 0 | |
|
Rsm Resort LLC Santa Barbara County |
1,011 | 0 | 0 | |
|
Escalon Golf Course WS San Joaquin County |
1,010 | 0 | 0 | |
|
Harris Ranch Beef CO Fresno County |
1,009 | 1 | 0 | |
|
CA State Parks Grover Hot Springs Alpine County |
1,008 | 0 | 0 | |
|
Stagecoach Inn Riverside County |
1,006 | 0 | 0 | |
|
Tioga Lake Campground Mono County |
1,006 | 0 | 0 | |
|
CA State Parks D.l. Bliss El Dorado County |
1,005 | 0 | 0 | |
|
Csp-Andrew Molera State Reserve Monterey County |
1,005 | 2 | 2 | |
|
La Jolla Third Gate Campground County |
1,005 | 0 | 0 | |
|
CA State Parks Emerald Bay, Vikingshol El Dorado County |
1,002 | 0 | 0 | |
|
San Antonio Lake Park North WS Monterey County |
1,002 | 1 | 0 | |
|
CA State Parks Emerald Bay, Boat Campg El Dorado County |
1,001 | 0 | 0 | |
|
Arco AM PM Pixley Tulare County |
1,000 | 0 | 0 | |
|
Baker Community Services District San Bernardino County |
1,000 | 3 | 1 | |
|
CA State Parks Emerald Bay, Eagle Poin El Dorado County |
1,000 | 0 | 0 | |
|
Cal Trans Coso Junction Inyo County |
1,000 | 0 | 0 | |
|
Cal-Trans Wiley Well Rest Stop Riverside County |
1,000 | 0 | 0 | |
|
Caltrans Phillip S. Raine Sfty Rsra SB Tulare County |
1,000 | 0 | 0 | |
|
Caltrans-Dunigan RS Yolo County |
1,000 | 0 | 0 | |
|
Caltrans-Trinidad NB Humboldt County |
1,000 | 1 | 0 | |
|
Caltrans-Weed Rest Stop Siskiyou County |
1,000 | 0 | 0 | |
|
China Lake Naval Air Weapons Station Kern County |
1,000 | 0 | 0 | |
|
Campo Casino (golden Acorn Casino) County |
1,000 | 0 | 0 | |
|
DE Anza Springs Resort San Diego County |
1,000 | 0 | 0 | |
|
Department of Transportation Stanislaus County |
1,000 | 0 | 0 | |
|
Easton Authority Jpa Fresno County |
1,000 | 2 | 2 | |
|
Elkhorn I-5 Rest Area Sacramento County |
1,000 | 0 | 0 | |
|
Emerald Cove Resort San Bernardino County |
1,000 | 0 | 0 | |
|
Glory Hole Recreation Area Calaveras County |
1,000 | 0 | 0 | |
|
Heavenly Ski Creek Station El Dorado County |
1,000 | 0 | 0 | |
|
Henningsen Lotus Park Water System El Dorado County |
1,000 | 2 | 0 | |
|
Horizon Christian Fellowship San Joaquin County |
1,000 | 0 | 0 | |
|
Jahant Food N Fuel Stop San Joaquin County |
1,000 | 0 | 0 | |
|
King Island Resort PWS San Joaquin County |
1,000 | 0 | 0 | |
|
Lake Yosemite County Park Merced County |
1,000 | 0 | 0 | |
|
Lakeside County Park Lake County |
1,000 | 0 | 0 | |
|
Loomis Community Park Placer County |
1,000 | 0 | 0 | |
|
Mammoth Lakes Basin Mono County |
1,000 | 0 | 0 | |
|
Mountain Empire High School San Diego County |
1,000 | 0 | 0 | |
|
MT Baldy Ski Lift San Bernardino County |
1,000 | 0 | 0 | |
|
Nugget Campground El Dorado County |
1,000 | 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.