All water systems in California
2,996 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Old River Golf Course San Joaquin County |
25 | 1 | 0 | |
|
Olde Towne San Joaquin County |
25 | 2 | 0 | |
|
Olivers Grocery Placer County |
25 | 0 | 0 | |
|
Olson Tract Water Association El Dorado County |
25 | 0 | 0 | |
|
Oswald Water System Sutter County |
25 | 1 | 0 | |
|
Overland Stockyard Kings County |
25 | 0 | 0 | |
|
Pacific Reefs Water District Mendocino County |
25 | 0 | 0 | |
|
Paraiso Hot Springs WS Monterey County |
25 | 0 | 0 | |
|
Parkfield Cafe and Inn WS Monterey County |
25 | 0 | 0 | |
|
Parkway RV Resort, the Glenn County |
25 | 0 | 0 | |
|
Parrish Ranch San Bernardino County |
25 | 0 | 0 | |
|
Passalacqua Winery Sonoma County |
25 | 0 | 0 | |
|
Paul J. Wines Amador County |
25 | 2 | 0 | |
|
Pedroncelli Winery Sonoma County |
25 | 0 | 0 | |
|
Pentecost Properties Water System Stanislaus County |
25 | 0 | 0 | |
|
Petrolink Hwy 138 INC San Bernardino County |
25 | 0 | 0 | |
|
Pg&e Lower Blue Lakes C.g. Alpine County |
25 | 0 | 0 | |
|
Pg&e Middle Blue Lakes C.g. Alpine County |
25 | 0 | 0 | |
|
Pg&e Upper Blue Dam Site Expansion CG Alpine County |
25 | 0 | 0 | |
|
Pg&e Upper Blue Lakes C.g. Alpine County |
25 | 0 | 0 | |
|
Pilot Lake Camp Sierra County |
25 | 0 | 0 | |
|
Pine Acres Blue Lake Resort Lake County |
25 | 0 | 0 | |
|
Pine Ridge Treatment Center San Bernardino County |
25 | 2 | 0 | |
|
Pizza Factory Janesville Lassen County |
25 | 0 | 0 | |
|
Pnf Gansner Bar CG / Work Center Plumas County |
25 | 0 | 0 | |
|
Point Arena Lighthouse Mendocino County |
25 | 0 | 0 | |
|
Ponderosa Campgrounds WS Monterey County |
25 | 0 | 0 | |
|
Poonia Family Enterprises, LLC Fresno County |
25 | 0 | 0 | |
|
Premium Packing INC WS Monterey County |
25 | 0 | 0 | |
|
R Wagon Bar Yuba County |
25 | 0 | 0 | |
|
Rainbow Sports Complex Stanislaus County |
25 | 0 | 0 | |
|
Ranch House Restaurant & Bar Sutter County |
25 | 0 | 0 | |
|
Rancho Victoria Tasting Room Amador County |
25 | 0 | 0 | |
|
Realm Estate Napa County |
25 | 0 | 0 | |
|
Red Fir Group Campground El Dorado County |
25 | 0 | 0 | |
|
Redwood Drive-In Mendocino County |
25 | 0 | 0 | |
|
Relax Inn San Bernardino County |
25 | 1 | 0 | |
|
Resendiz Fruit Barn Stanislaus County |
25 | 0 | 0 | |
|
Riego Market Placer County |
25 | 0 | 0 | |
|
Ripon Church of Christ San Joaquin County |
25 | 0 | 0 | |
|
River Mill, the San Joaquin County |
25 | 0 | 0 | |
|
Rmrc-Coy Flat Campground Tulare County |
25 | 0 | 0 | |
|
Roaring Camp Amador County |
25 | 0 | 0 | |
|
Roberts Ferry Nut Co, INC (ws) Stanislaus County |
25 | 0 | 0 | |
|
Rock Creek Lodge Mono County |
25 | 0 | 0 | |
|
Roth Winery Sonoma County |
25 | 0 | 0 | |
|
Route 66 Market San Bernardino County |
25 | 0 | 0 | |
|
Rrg Garden Farming Operations Yolo County |
25 | 0 | 0 | |
|
Rustic Bar-B-Q Yolo County |
25 | 0 | 0 | |
|
Saints Peter & Paul Russian Church Sonoma County |
25 | 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.