All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Orleans C.s.d. Humboldt County |
636 | 4 | 3 | |
|
Yosemite Nps-El Portal Mariposa County |
635 | 0 | 0 | |
|
Mineral County Water District Tehama County |
634 | 1 | 1 | |
|
Tradewind Water Assoc. Kern County |
632 | 2 | 1 | |
|
Newell County Water District Modoc County |
629 | 2 | 1 | |
|
San Martin County Water District Santa Clara County |
627 | 0 | 0 | |
|
Musd-New Haven School San Joaquin County |
626 | 1 | 0 | |
|
Gerber Union Elementary School District Tehama County |
625 | 1 | 1 | |
|
Lake Alpine Water Company Alpine County |
625 | 0 | 0 | |
|
Kings River RV Resort, LLC Tulare County |
624 | 0 | 0 | |
|
Arctic Cold Santa Barbara County |
623 | 0 | 0 | |
|
Mt. Madonna County Park Santa Clara County |
621 | 0 | 0 | |
|
Moonlight Packing Co. LLC Plant 8 Fresno County |
620 | 0 | 0 | |
|
Howard Elementary School Madera County |
618 | 0 | 0 | |
|
Nepenthe WS Monterey County |
618 | 2 | 1 | |
|
Adventist Health St. Helena Hospital Napa County |
617 | 0 | 0 | |
|
Julian Community Services District San Diego County |
617 | 3 | 2 | |
|
Plainview Mutual Water Company Tulare County |
617 | 1 | 1 | |
|
Ducor Csd Tulare County |
616 | 1 | 1 | |
|
Point Arena Rancheria County |
616 | 0 | 0 | |
|
Shaver Lake Heights Mwc Fresno County |
616 | 1 | 1 | |
|
Whiskeytown Nra-Whiskey Creek Shasta County |
616 | 0 | 0 | |
|
Csa 62 Riverside County |
614 | 1 | 1 | |
|
Trout Gulch Mutual Water Company Santa Cruz County |
614 | 0 | 0 | |
|
Usfs Clark Fork Campd Tuolumne County |
612 | 1 | 0 | |
|
Csa 70 W-3 Hacienda San Bernardino County |
611 | 1 | 0 | |
|
Csp-Armstrong Redwoods State Reserve Sonoma County |
611 | 0 | 0 | |
|
Riverdale Park Tract Csd Stanislaus County |
610 | 1 | 0 | |
|
Bitney Springs Center Water System Nevada County |
606 | 0 | 0 | |
|
Lassen Vnp Manzanita Lake Tehama County |
606 | 0 | 0 | |
|
Lucerne Valley High School San Bernardino County |
606 | 0 | 0 | |
|
Cal AM Dunnigan Yolo County |
602 | 0 | 0 | |
|
River Lodge Resort San Bernardino County |
602 | 0 | 0 | |
|
Alameda Point Alameda County |
600 | 0 | 0 | |
|
Big Pine Paiute Band Big Pine Reservation · County |
600 | 1 | 1 | |
|
Caltrans-Grass Lake Rest Stop Siskiyou County |
600 | 0 | 0 | |
|
Carver Tract Mutual Water Comp Riverside County |
600 | 2 | 1 | |
|
Cedarville County Water Dist. Modoc County |
600 | 0 | 0 | |
|
Country Life MH & RV Park Imperial County |
600 | 2 | 1 | |
|
Excelsior Middle School Contra Costa County |
600 | 0 | 0 | |
|
Feather River Community College Plumas County |
600 | 0 | 0 | |
|
Grand Island Mansion Sacramento County |
600 | 1 | 0 | |
|
Lytton Rancheria Water System County |
600 | 0 | 0 | |
|
Mesa Dunes Mobile Home Estates San Luis Obispo County |
600 | 0 | 0 | |
|
Outdoor Resorts Rancho CA Riverside County |
600 | 0 | 0 | |
|
Pleasant Valley Baptist Church Butte County |
600 | 2 | 1 | |
|
Rancho Sespe Workers Imp Assoc Ventura County |
600 | 1 | 0 | |
|
Rodeway Inn San Joaquin County |
600 | 0 | 0 | |
|
San Francisco Regional Water System San Francisco County |
600 | 0 | 0 | |
|
San Joaquin River Club INC San Joaquin County |
600 | 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.