All water systems in California
2,996 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Camp Tecuya Water System Kern County |
180 | 0 | 0 | |
|
Colby Ranch-United Methodist Camp Los Angeles County |
180 | 0 | 0 | |
|
Los Vaqueros Marina Bldg Contra Costa County |
180 | 0 | 0 | |
|
Saratoga Springs, Inc. Santa Clara County |
180 | 0 | 0 | |
|
Southern California Blending Center INC San Bernardino County |
180 | 0 | 0 | |
|
Lower Springs Water CO Tulare County |
179 | 0 | 0 | |
|
Marble Quarry Resort Tuolumne County |
176 | 1 | 0 | |
|
Rivers Bend Resort El Dorado County |
176 | 0 | 0 | |
|
Banner Small Water Company San Diego County |
175 | 1 | 0 | |
|
Cornerstone Sonoma Sonoma County |
175 | 0 | 0 | |
|
Jesuit Retreat Center of the Sierra Placer County |
175 | 1 | 0 | |
|
Landmark Vineyards, Ltd. Sonoma County |
175 | 0 | 0 | |
|
Summerdale Campground Mariposa County |
175 | 0 | 0 | |
|
Lakeshore Villa Center Shasta County |
174 | 0 | 0 | |
|
View Crest Lodge Humboldt County |
174 | 0 | 0 | |
|
Cdpr-Sector Wide Potable Water Tanks Merced County |
172 | 0 | 0 | |
|
Csp Portola State Park San Mateo County |
172 | 0 | 0 | |
|
Hog Island Oyster Co. Marin County |
172 | 0 | 0 | |
|
LA Madrona Athletic Club Santa Cruz County |
172 | 0 | 0 | |
|
MT Lassen / Shingletown RV Park Shasta County |
171 | 0 | 0 | |
|
Bianchi Winery County |
170 | 0 | 0 | |
|
Gambonini Family Ranch Sonoma County |
170 | 0 | 0 | |
|
Hat Creek Resort & RV Park, LLC Shasta County |
170 | 0 | 0 | |
|
Juniper Village Farm Labor Housing Dorris · Siskiyou County |
170 | 1 | 0 | |
|
Rancho del Rey Golf Club Merced County |
170 | 1 | 0 | |
|
Sanford Winery Santa Barbara County |
170 | 1 | 1 | |
|
Sequoia Crest Mutual Water Company Tulare County |
170 | 0 | 0 | |
|
Zaca Mesa Winery Santa Barbara County |
170 | 0 | 0 | |
|
Leoni Meadows Camp El Dorado County |
169 | 0 | 0 | |
|
Moose Camp Shasta County |
169 | 0 | 0 | |
|
Colusa Landing Colusa County |
168 | 0 | 0 | |
|
Koinonia Conference Grounds Santa Cruz County |
168 | 0 | 0 | |
|
Usfs Eureka Valley Campgd Tuolumne County |
168 | 1 | 0 | |
|
Bishop Country Club Inyo County |
167 | 0 | 0 | |
|
Juan Mean Burrito Water System Shasta County |
165 | 1 | 1 | |
|
Okizu Foundation Calaveras County |
165 | 0 | 0 | |
|
Carmel by the River RV Park WS Monterey County |
164 | 0 | 0 | |
|
Whispering Winds Catholic Conference Cen San Diego County |
164 | 0 | 0 | |
|
YMCA Camp Sequoia Gaines Fresno County |
164 | 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 | |
|
Brick Barn Estate Winery Santa Barbara County |
160 | 0 | 0 | |
|
Dragonfly Golf Course/water Madera County |
160 | 0 | 0 | |
|
Jitter Bean Coffee Lakeport · Lake County |
160 | 0 | 0 | |
|
Lakeview Improvement Association 1 Fresno County |
160 | 0 | 0 | |
|
Pattersons Pub Mendocino County |
160 | 0 | 0 | |
|
Usfs Black Oak Campground Tuolumne County |
160 | 0 | 0 | |
|
Moose Lodge 1967 Solano County |
159 | 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.