All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Melody Woods Water Company Santa Clara County |
168 | 3 | 0 | |
|
Usfs Eureka Valley Campgd Tuolumne County |
168 | 1 | 0 | |
|
Bishop Country Club Inyo County |
167 | 0 | 0 | |
|
Crain Walnut Shelling, Inc. Tehama County |
167 | 1 | 1 | |
|
Silver Oak Wine Cellars Napa County |
167 | 1 | 1 | |
|
Renaissance High School Santa Cruz County |
166 | 1 | 1 | |
|
San Justo Mutual Water Company San Benito County |
166 | 2 | 1 | |
|
Struve RD WS #02 Monterey County |
166 | 1 | 0 | |
|
Butteville Union School Siskiyou County |
165 | 0 | 0 | |
|
Cuddeback Grammar School Humboldt County |
165 | 2 | 1 | |
|
Juan Mean Burrito Water System Shasta County |
165 | 1 | 1 | |
|
Matsui Nursery WS Monterey County |
165 | 0 | 0 | |
|
Mt. Eden Mutual Water Company Santa Clara County |
165 | 1 | 0 | |
|
Nps-Wolverton Tulare County |
165 | 4 | 1 | |
|
Okizu Foundation Calaveras County |
165 | 0 | 0 | |
|
Pacific Point Christian School Santa Clara County |
165 | 0 | 0 | |
|
San Joaquin Estates Mutual Water Company Kern County |
165 | 2 | 0 | |
|
Saputo Dairy Food USA Tulare County |
165 | 0 | 0 | |
|
T & a Onions San Benito County |
165 | 0 | 0 | |
|
Williams Mutual Water Company Tulare County |
165 | 1 | 1 | |
|
Carmel by the River RV Park WS Monterey County |
164 | 0 | 0 | |
|
Psmcsd Vierra Estates WS Monterey County |
164 | 1 | 0 | |
|
Whispering Winds Catholic Conference Cen San Diego County |
164 | 0 | 0 | |
|
YMCA Camp Sequoia Gaines Fresno County |
164 | 0 | 0 | |
|
Crystal Lake Property Owners San Bernardino County |
163 | 2 | 1 | |
|
Hartland Christian Camp Tulare County |
163 | 1 | 0 | |
|
Surrey Village Water Co. Inc. Tehama County |
163 | 1 | 1 | |
|
Viejo Ltd San Joaquin County |
163 | 0 | 0 | |
|
Center Water CO San Bernardino County |
162 | 0 | 0 | |
|
Laguna Seca WC Monterey County |
162 | 1 | 0 | |
|
Madera CO Md1-Hidden Lake Estates Madera County |
162 | 1 | 0 | |
|
Madson Gardens Apartments Tulare County |
162 | 0 | 0 | |
|
Chuckwalla Valley Raceway Water System Riverside County |
161 | 0 | 0 | |
|
Rollins Lake Resort, Long Ravine Placer County |
161 | 0 | 0 | |
|
Usfs Camp 9 Kern County |
161 | 0 | 0 | |
|
Auction Mart Snack Bar Shasta County |
160 | 0 | 0 | |
|
Bonny Doon School Santa Cruz County |
160 | 0 | 0 | |
|
Brick Barn Estate Winery Santa Barbara County |
160 | 0 | 0 | |
|
Browns Elementary School Sutter County |
160 | 0 | 0 | |
|
California Dairies INC Tipton Tulare County |
160 | 0 | 0 | |
|
Clarksburg Comm Church Yolo County |
160 | 0 | 0 | |
|
Clear Creek School Nevada County |
160 | 0 | 0 | |
|
Clover Flat Elementary School San Diego County |
160 | 0 | 0 | |
|
Colusa Co. Service Area #2-Stonyford Colusa County |
160 | 0 | 0 | |
|
Comunidad Nuevo Lago, INC Fresno County |
160 | 0 | 0 | |
|
Cuyamaca Water District San Diego County |
160 | 0 | 0 | |
|
Dragonfly Golf Course/water Madera County |
160 | 0 | 0 | |
|
Esperanza RD WS Monterey County |
160 | 0 | 0 | |
|
IL Vineto San Joaquin County |
160 | 0 | 0 | |
|
Jitter Bean Coffee Lakeport · Lake County |
160 | 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.