All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Jennings Wwtp Stanislaus County |
30 | 1 | 1 | |
|
Jireh Packing Group Cutler Tulare County |
30 | 1 | 1 | |
|
Johnsville Public Utility Dist Plumas County |
30 | 0 | 0 | |
|
Juanita Lake Campground Siskiyou County |
30 | 0 | 0 | |
|
Jug Handle Creek Farm Mendocino County |
30 | 0 | 0 | |
|
Keenwild Station Usfs Riverside County |
30 | 1 | 0 | |
|
Kings Rest Motel Kings County |
30 | 0 | 0 | |
|
Kingvale Property Owners & Water Users Nevada County |
30 | 0 | 0 | |
|
Klamath Basin National Wildlife Refuge Siskiyou County |
30 | 1 | 0 | |
|
Konocti Shores Lake County |
30 | 0 | 0 | |
|
Krotona Institute Ventura County |
30 | 2 | 1 | |
|
Kyburz Mutual Water Company El Dorado County |
30 | 5 | 0 | |
|
Ladwp Control Gorge Power Plant Inyo County |
30 | 0 | 0 | |
|
Lake Olancha RV Park Inyo County |
30 | 0 | 0 | |
|
Lakeside Mobile Estates Calaveras County |
30 | 0 | 0 | |
|
Larsen Ranch 39-40/water System San Joaquin County |
30 | 4 | 3 | |
|
Last Chance Saloon Plumas County |
30 | 0 | 0 | |
|
Laureate Water Company San Luis Obispo County |
30 | 1 | 0 | |
|
Lieto Water System (reach Chartr School) Sonoma County |
30 | 0 | 0 | |
|
Lindy's Landing Tulare County |
30 | 1 | 1 | |
|
Little Shasta School Siskiyou County |
30 | 0 | 0 | |
|
Live Oak Creek Mutual Water Company Santa Clara County |
30 | 1 | 0 | |
|
Lokoya Winery Napa County |
30 | 0 | 0 | |
|
Longbranch Saloon, the San Luis Obispo County |
30 | 0 | 0 | |
|
Los Vaqueros Interpretive Center Contra Costa County |
30 | 0 | 0 | |
|
La Cienega MHP County |
30 | 2 | 1 | |
|
Macdonald Bunkhouse Sonoma County |
30 | 0 | 0 | |
|
Mammoth Pool Mobile Home Park Madera County |
30 | 2 | 1 | |
|
Marchi Central Farm San Mateo County |
30 | 2 | 0 | |
|
Massa Estate Vineyards WS (prev Heller) Monterey County |
30 | 0 | 0 | |
|
Matrix Winery Sonoma County |
30 | 0 | 0 | |
|
Mendocino Presbyterian Church Mendocino County |
30 | 0 | 0 | |
|
Merced Animal Medical Center Merced County |
30 | 0 | 0 | |
|
Mokelumne Beach RV Park San Joaquin County |
30 | 0 | 0 | |
|
Morning Star Pkg. Co.-Wms. Colusa County |
30 | 0 | 0 | |
|
Moshin Vineyards Sonoma County |
30 | 0 | 0 | |
|
Mount Whitney Golf Club Inyo County |
30 | 1 | 0 | |
|
Mt. Hebron Work Center Siskiyou County |
30 | 0 | 0 | |
|
Murray Family Farms at Copus Road Kern County |
30 | 0 | 0 | |
|
Mustang Springs Mutual Water San Luis Obispo County |
30 | 0 | 0 | |
|
OG Investments, LLC San Bernardino County |
30 | 0 | 0 | |
|
Orchard LN WS #09 Monterey County |
30 | 0 | 0 | |
|
Outpost Wines Napa County |
30 | 0 | 0 | |
|
P G & E-Turner Cut Water System San Joaquin County |
30 | 0 | 0 | |
|
Paradise Valley Mwc Riverside County |
30 | 0 | 0 | |
|
Pelligrini Properties (el Campo Market) Merced County |
30 | 1 | 0 | |
|
Pezzini Farms WS Monterey County |
30 | 0 | 0 | |
|
Pg&e Helms Hq/powerhouse Fresno County |
30 | 0 | 0 | |
|
Phillips Farms San Joaquin County |
30 | 0 | 0 | |
|
Plumas County Gansner Park Plumas County |
30 | 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.