All water systems in California
2,996 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Rollins Lakeside Resort Nevada County |
35 | 0 | 0 | |
|
Saini Winery Sonoma County |
35 | 0 | 0 | |
|
Shop & Save Yuba County |
35 | 0 | 0 | |
|
Snow Valley Mountain Resort San Bernardino County |
35 | 2 | 0 | |
|
Sonoma Botanical Garden Sonoma County |
35 | 0 | 0 | |
|
Tahoe Vistana Placer County |
35 | 1 | 0 | |
|
Tres Hermanas Winery Santa Barbara County |
35 | 0 | 0 | |
|
Truett & Hurst Winery Sonoma County |
35 | 0 | 0 | |
|
Ucla White Mountain Research Center Inyo County |
35 | 0 | 0 | |
|
United Rentals Sonoma County |
35 | 0 | 0 | |
|
Usfs-Lower Peppermint Tulare County |
35 | 0 | 0 | |
|
Victor Packing Madera County |
35 | 0 | 0 | |
|
Wiebe Farms Tulare County |
35 | 2 | 0 | |
|
Willowest Marina WS Contra Costa County |
35 | 0 | 0 | |
|
B & R Farms San Benito County |
34 | 0 | 0 | |
|
Best Western Cajon Pass San Bernardino County |
34 | 1 | 0 | |
|
Billingsley Dvm Water System Kern County |
34 | 0 | 0 | |
|
Bloomingcamp Water System Stanislaus County |
34 | 1 | 0 | |
|
Caltrans-Whitmore Maint. Station Placer County |
34 | 0 | 0 | |
|
Camp Chilnualna Water System Mariposa County |
34 | 1 | 0 | |
|
Camp Lockett Middle School San Diego County |
34 | 1 | 1 | |
|
Corral Creek Resort Tulare County |
34 | 0 | 0 | |
|
Descanso Fire Station San Diego County |
34 | 0 | 0 | |
|
Exodus Farms Shasta County |
34 | 0 | 0 | |
|
Flux River Resort Trinity County |
34 | 0 | 0 | |
|
Italics Winery Napa County |
34 | 0 | 0 | |
|
Richmond Park Resort Lake County |
34 | 0 | 0 | |
|
Shadybrook Estates Winery Napa County |
34 | 0 | 0 | |
|
Sherman Island Marina Sacramento County |
34 | 1 | 0 | |
|
Tahoe Mountain Inn El Dorado County |
34 | 0 | 0 | |
|
Tehachapi Cummings County Water District Kern County |
34 | 0 | 0 | |
|
UC Elkus Ranch San Mateo County |
34 | 0 | 0 | |
|
Aperture Cellars Sonoma County |
33 | 0 | 0 | |
|
Blu-In Cafe Imperial County |
33 | 1 | 0 | |
|
Boisset de Loach Winery Sonoma County |
33 | 0 | 0 | |
|
Carson River Resort Alpine County |
33 | 0 | 0 | |
|
Ellman Family Winery Napa County |
33 | 0 | 0 | |
|
Fort Ross Lodge, LLC Sonoma County |
33 | 0 | 0 | |
|
Gazos Creek Beach House San Mateo County |
33 | 0 | 0 | |
|
Holland Market Yolo County |
33 | 0 | 0 | |
|
Holliday Rock Plant #2 Kern County |
33 | 0 | 0 | |
|
LA Honda Center San Mateo County |
33 | 0 | 0 | |
|
Mission Creek Preserve Riverside County |
33 | 0 | 0 | |
|
Mountain View Plaza Water System Shasta County |
33 | 0 | 0 | |
|
Quintessa Winery Water System St. Helena · Napa County |
33 | 0 | 0 | |
|
Rankin Ranch Kern County |
33 | 0 | 0 | |
|
Royal Oaks Market WS Monterey County |
33 | 0 | 0 | |
|
Sonoma Mountain Zen Center Sonoma County |
33 | 0 | 0 | |
|
VO UU Buddhist Meditation Association Santa Clara County |
33 | 0 | 0 | |
|
Alpine Mutual Water Company Inyo County |
32 | 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.