All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Alexander Valley Campground County |
205 | 0 | 0 | |
|
Byron Corners INC Contra Costa County |
205 | 0 | 0 | |
|
Camanche North Shore Inc. Amador County |
205 | 0 | 0 | |
|
Certainteed LLC Madera County |
205 | 0 | 0 | |
|
Cottonwood Ridge Manufactured Housing CO Shasta County |
205 | 0 | 0 | |
|
Dunnigan Chevron Yolo County |
205 | 0 | 0 | |
|
Lake Elementary School Glenn County |
205 | 0 | 0 | |
|
Optimists Volunteers for Youth San Mateo County |
205 | 1 | 0 | |
|
Orange Grove RV Park Kern County |
205 | 1 | 0 | |
|
Porterville Mobile Village Tulare County |
205 | 1 | 1 | |
|
Scout Island Fresno · Fresno County |
205 | 1 | 0 | |
|
Santa Rosa Reservation County |
205 | 1 | 0 | |
|
Balls Ferry Fishing Resort Shasta County |
204 | 0 | 0 | |
|
Casa de Amigos Manufactured Housing Comm Stanislaus County |
204 | 0 | 0 | |
|
Csp-Sugarloaf Ridge State Park Sonoma County |
204 | 0 | 0 | |
|
Emerald Cove Camp Madera County |
204 | 1 | 0 | |
|
Gonzales Gas Station WS Monterey County |
204 | 1 | 0 | |
|
Lake Spaulding Campground Nevada County |
204 | 0 | 0 | |
|
New Hope Community Church Fresno County |
204 | 0 | 0 | |
|
Preserve at Millerton Lake Water System Madera County |
204 | 0 | 0 | |
|
Rmrc-Wishon Campground Tulare County |
204 | 0 | 0 | |
|
Silverthorn Resort Shasta County |
204 | 0 | 0 | |
|
South Fork Middle School Kern County |
204 | 0 | 0 | |
|
Tecate Vista Mutual Water Company San Diego County |
204 | 1 | 1 | |
|
The Ranch Church Santa Barbara County |
204 | 0 | 0 | |
|
Usfs Sandy Flat Campground WS Kern County |
204 | 0 | 0 | |
|
Anza RV Resort Riverside County |
203 | 0 | 0 | |
|
Cws-Split Mountain Water System Kern County |
203 | 0 | 0 | |
|
EL Dorado West MHP Sacramento County |
203 | 0 | 0 | |
|
School House Restaurant and Tavern Fresno County |
203 | 1 | 0 | |
|
Selma Exxon Tiger Mart Fresno County |
203 | 0 | 0 | |
|
Anchor Retreat Center Los Angeles County |
202 | 0 | 0 | |
|
Camp Ronald McDonald for G.t. Riverside County |
202 | 0 | 0 | |
|
Connection Point Church Vacaville · Solano County |
202 | 0 | 0 | |
|
Cottonwood School Riverside County |
202 | 0 | 0 | |
|
Crossover Church of Rosedale WS Kern County |
202 | 0 | 0 | |
|
Csp-Limekiln Monterey County |
202 | 0 | 0 | |
|
Date Gardens Mobile Home Park Imperial County |
202 | 2 | 1 | |
|
Extra Mart Madera County |
202 | 0 | 0 | |
|
Kern CO P&r-Tehachapi MT Park Water Kern County |
202 | 0 | 0 | |
|
Nicasio Ranch LLC Marin County |
202 | 0 | 0 | |
|
Peninsula Campground Water System Nevada County |
202 | 0 | 0 | |
|
Ponderosa Pines Christian Camp San Bernardino County |
202 | 0 | 0 | |
|
Ruth Lake Marina Trinity County |
202 | 0 | 0 | |
|
Twain Harte Valley Mwc Tuolumne County |
202 | 2 | 1 | |
|
California Odd Fellow-Rebekah Tuolumne County |
201 | 1 | 0 | |
|
Death Valley Junction Inyo County |
201 | 1 | 0 | |
|
Harmony Ridge Resort Nevada County |
201 | 0 | 0 | |
|
San Juan Vista San Joaquin County |
201 | 0 | 0 | |
|
Yoga Center Retreat San Diego County |
201 | 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.