All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Sierra Linda Mutual Water CO Madera County |
200 | 3 | 1 | |
|
Sierraville P.u.d. Sierra County |
200 | 0 | 0 | |
|
Sloughhouse Inn Sacramento County |
200 | 1 | 0 | |
|
Snowline Madera County |
200 | 0 | 0 | |
|
Sonoma Warehousing Sonoma County |
200 | 0 | 0 | |
|
Stockdale Mutual Water Co. Kern County |
200 | 0 | 0 | |
|
Strasbaugh, INC San Luis Obispo County |
200 | 1 | 0 | |
|
Success Market Tulare County |
200 | 1 | 0 | |
|
Sun Pacific Shippers LP Exeter Tulare County |
200 | 0 | 0 | |
|
Sycamore Mineral Springs Resort San Luis Obispo County |
200 | 1 | 1 | |
|
Tahama Village Mobile Home Park San Joaquin County |
200 | 0 | 0 | |
|
The Barn Tulare County |
200 | 2 | 0 | |
|
The Morning Star Company Stanislaus County |
200 | 0 | 0 | |
|
The Ranch Winery Napa County |
200 | 1 | 1 | |
|
Tnf-Cal-Ida Well Sierra County |
200 | 0 | 0 | |
|
Tomales High School Marin County |
200 | 1 | 1 | |
|
Toyon Middle School Calaveras County |
200 | 0 | 0 | |
|
Tpwc Dba the Prisoner Wine Company Napa County |
200 | 0 | 0 | |
|
Treasure Mountain Camp Sierra County |
200 | 0 | 0 | |
|
Trees of Mystery Del Norte County |
200 | 1 | 0 | |
|
Tucker Acres Mutual Water Co. Napa County |
200 | 1 | 1 | |
|
U.s. Army Corps-Lake Mendo (marina Site) Mendocino County |
200 | 0 | 0 | |
|
United Travel Plaza Yolo County |
200 | 1 | 0 | |
|
USA Petro Super Stop Tulare County |
200 | 1 | 0 | |
|
Usace-Kaweah Recreation Area Tulare County |
200 | 0 | 0 | |
|
Usfs Lee Vining Ranger Station Mono County |
200 | 0 | 0 | |
|
Usn San Clemente Island San Diego County |
200 | 3 | 0 | |
|
Villa Cerezos San Joaquin County |
200 | 0 | 0 | |
|
Virgin Sturgeon Sacramento County |
200 | 0 | 0 | |
|
Walker Creek Ranch Educational Center Marin County |
200 | 0 | 0 | |
|
Walnut Cove Mobile Estates Lake County |
200 | 0 | 0 | |
|
Walnut Grove Elementary School Sacramento County |
200 | 1 | 1 | |
|
Waltons Grizzly Lodge Plumas County |
200 | 0 | 0 | |
|
Welcome Grange Hall Napa County |
200 | 1 | 0 | |
|
Woodcraft Rangers San Bernardino County |
200 | 1 | 0 | |
|
YMCA Camp Tulequoia/millwood Fresno County |
200 | 0 | 0 | |
|
Yosemite Bible Camp Madera County |
200 | 0 | 0 | |
|
Yulupa Mutual Water Company Sonoma County |
200 | 0 | 0 | |
|
Sierra Breeze Mutual Water Company Kern County |
199 | 0 | 0 | |
|
Alpine Village Riverside County |
198 | 0 | 0 | |
|
China Lake Acres Mutual Water Company Kern County |
198 | 0 | 0 | |
|
Colonial Oak WC INC Monterey County |
198 | 2 | 1 | |
|
Crazzy's Wasewagan Camp San Bernardino County |
198 | 0 | 0 | |
|
Sterling Mutual Water Company Los Angeles County |
198 | 2 | 2 | |
|
Western Skies Mobile Home Park Los Angeles County |
198 | 1 | 1 | |
|
Laton High School Fresno County |
197 | 1 | 1 | |
|
Fcwwd 40 Shaver Springs Fresno County |
196 | 1 | 0 | |
|
Long Valley Charter School Lassen County |
196 | 0 | 0 | |
|
Reeds Creek School Tehama County |
196 | 0 | 0 | |
|
Saticoy Country Club-City of Ventura Ventura · Ventura County |
196 | 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.