All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Mountain Village Homeowner's Assoc Butte County |
45 | 2 | 1 | |
|
Norcal Water Works Tehama County |
45 | 1 | 0 | |
|
Nomlaki Tribal Community Complex County |
45 | 0 | 0 | |
|
Olive Dell Ranch San Bernardino County |
45 | 3 | 0 | |
|
Panama Road Property Owners Assoc Kern County |
45 | 0 | 0 | |
|
Pg&e Psea Camp Shasta Shasta County |
45 | 0 | 0 | |
|
Pg&e Trapper Springs Campgrnd Fresno County |
45 | 1 | 0 | |
|
Piccolo Water System Fresno County |
45 | 0 | 0 | |
|
Plant Water Well Rockview Dairy South Gate · Los Angeles County |
45 | 0 | 0 | |
|
Roche Family Winery Sonoma County |
45 | 0 | 0 | |
|
Rolling Hills Nut Company Modesto · Stanislaus County |
45 | 0 | 0 | |
|
Rodriguez MHP County |
45 | 0 | 0 | |
|
San Miguel WS #03 Monterey County |
45 | 1 | 1 | |
|
Sequoia Motel Tulare County |
45 | 1 | 0 | |
|
Shasta-Sustainable Resource Management Shasta County |
45 | 0 | 0 | |
|
Skyline Ranch RV Park & Campground San Diego County |
45 | 0 | 0 | |
|
South Kern Industrial Center Kern County |
45 | 0 | 0 | |
|
Spreckels LN WS #03 Monterey County |
45 | 1 | 1 | |
|
Stevinson Ranch Maint. Shop/the Grove Merced County |
45 | 0 | 0 | |
|
Summit View Ranch Mutual Water Co. Sonoma County |
45 | 0 | 0 | |
|
Sunny Acres Mws Monterey County |
45 | 1 | 1 | |
|
Tank Farm Business Park San Luis Obispo County |
45 | 2 | 1 | |
|
Thabit Tulare County |
45 | 0 | 0 | |
|
Trattore Winery Sonoma County |
45 | 0 | 0 | |
|
Unitarian Church of Davis Yolo County |
45 | 0 | 0 | |
|
Usfs/lassen Hat CR Work Center Shasta County |
45 | 0 | 0 | |
|
V. Sattui Winery Napa County |
45 | 2 | 1 | |
|
Valley View Ranches Santa Clara County |
45 | 2 | 0 | |
|
Whitehall Lane Winery Napa County |
45 | 0 | 0 | |
|
Whitethorn Construction Humboldt County |
45 | 1 | 0 | |
|
Wilbur-Ellis Company LLC Yolo County |
45 | 1 | 0 | |
|
Woodside WA Monterey County |
45 | 1 | 1 | |
|
Woodson Bridge RV Park Tehama County |
45 | 1 | 1 | |
|
Zen Mountain Center Riverside County |
45 | 0 | 0 | |
|
Zinc House Farm Winery San Joaquin County |
45 | 0 | 0 | |
|
Arrowood Vineyards & Winery Sonoma County |
44 | 0 | 0 | |
|
Burlando Heights Mutual Water Co. Kern County |
44 | 0 | 0 | |
|
Camp Jones Gulch San Mateo County |
44 | 0 | 0 | |
|
Choctaw Valley Mutual Water Co. Kern County |
44 | 0 | 0 | |
|
Castro Ranch County |
44 | 0 | 0 | |
|
Downtown Graton Mutual Water System Sonoma County |
44 | 0 | 0 | |
|
Eagle Ridge RV Park Plumas County |
44 | 0 | 0 | |
|
Forest Knolls Mutual Water CO Butte County |
44 | 1 | 1 | |
|
Fottw Nevada County |
44 | 2 | 0 | |
|
Marin French Cheese CO Marin County |
44 | 0 | 0 | |
|
Mountain View MHP Tulare County |
44 | 0 | 0 | |
|
Musick Heights Mutual Fresno County |
44 | 0 | 0 | |
|
Ocotillo Wells RV Park & Store San Diego County |
44 | 0 | 0 | |
|
Pape Machinery Sacramento County |
44 | 0 | 0 | |
|
Pine Ridge Park Estates Shasta County |
44 | 1 | 1 |
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.