All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Sciots Tract Water System El Dorado County |
223 | 0 | 0 | |
|
Boething Treeland Farms INC San Joaquin County |
222 | 0 | 0 | |
|
Francis Coppola Winery Sonoma County |
222 | 1 | 1 | |
|
Lee Vining Public Utility District Mono County |
222 | 0 | 0 | |
|
Rmrc-Goldledge Campground Tulare County |
222 | 0 | 0 | |
|
Utu Utu Gwaitu Paiute Tribe Benton Paiute Reservation · County |
222 | 4 | 3 | |
|
Alvina School Fresno County |
221 | 0 | 0 | |
|
Drytown County Water District Amador County |
221 | 1 | 0 | |
|
North Star Mobile Home Park Sonoma County |
221 | 0 | 0 | |
|
Pioneer Elementary School El Dorado County |
221 | 2 | 1 | |
|
Qvwd-West & East Combined Water System Kern County |
221 | 0 | 0 | |
|
Richmond Elementary School Lassen County |
221 | 0 | 0 | |
|
San Luis Hills Merced County |
221 | 0 | 0 | |
|
Sylvan Harbor Trailer Park Humboldt County |
221 | 1 | 0 | |
|
Alpine Clinic (sihc) County |
220 | 0 | 0 | |
|
E Headstart Tehama County |
220 | 0 | 0 | |
|
EL Nido Elementary School Merced County |
220 | 0 | 0 | |
|
Happy Acres Mwc Santa Clara County |
220 | 0 | 0 | |
|
Howonquet Community(smith River) Howonquet Community · County |
220 | 5 | 0 | |
|
Lower Bucks Lake Lds Camp Plumas County |
220 | 0 | 0 | |
|
Pleasant View West School Tulare County |
220 | 2 | 0 | |
|
Ripplewood Resort WS Monterey County |
220 | 0 | 0 | |
|
The Oaks Venture, LLC San Diego County |
220 | 0 | 0 | |
|
The Peg House Mendocino County |
220 | 0 | 0 | |
|
Waukena Elementary School Tulare County |
220 | 3 | 1 | |
|
Wolf Lakes Park Fresno County |
220 | 1 | 0 | |
|
FC Tracy Holdings, LLC San Joaquin County |
219 | 0 | 0 | |
|
Los Gatos Tomato Products Fresno County |
219 | 0 | 0 | |
|
Armenian Church Camp Fresno County |
218 | 2 | 0 | |
|
Merced River Resort Merced County |
218 | 1 | 0 | |
|
Mid MC Clure Point Rec Area Mariposa County |
218 | 0 | 0 | |
|
Paradise School Stanislaus County |
218 | 0 | 0 | |
|
Old Oak Ranch Tuolumne County |
217 | 1 | 0 | |
|
Pine Union School Imperial County |
217 | 1 | 0 | |
|
Usmc Nebo (barstow) San Bernardino County |
217 | 0 | 0 | |
|
Coleville High School Mono County |
216 | 1 | 1 | |
|
Coyote Lake County Park Santa Clara County |
216 | 1 | 0 | |
|
Panamint Springs Resort Inyo County |
216 | 1 | 0 | |
|
Pond-Derosa Oaks WC Monterey County |
216 | 1 | 1 | |
|
Alpine View Campground Trinity County |
215 | 0 | 0 | |
|
Barstow Calico KOA San Bernardino County |
215 | 0 | 0 | |
|
Del Norte Mutual Water Co. Ventura County |
215 | 3 | 1 | |
|
EL Rancho Mobile Home Park Los Angeles County |
215 | 0 | 0 | |
|
Grizzly Lake Csd-Crocker/welch Plumas County |
215 | 2 | 0 | |
|
Hearst Monument State Park San Luis Obispo County |
215 | 0 | 0 | |
|
Holman Ranch WS Monterey County |
215 | 0 | 0 | |
|
Moaning Cavern Calaveras County |
215 | 0 | 0 | |
|
Skippers Cove Nevada County |
215 | 0 | 0 | |
|
Yurok Requa County |
215 | 7 | 2 | |
|
Tahoe City Pud Alpine Peaks Tahoe City · Placer County |
214 | 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.