All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Henderson County Park Merced County |
250 | 0 | 0 | |
|
Holcomb Valley Ranch San Bernardino County |
250 | 2 | 0 | |
|
Jackass Rock Camp Madera County |
250 | 0 | 0 | |
|
Lake Jodie Water System San Bernardino County |
250 | 3 | 1 | |
|
Lake Wohlford Resort San Diego County |
250 | 0 | 0 | |
|
Lazy Landing Mobile Home Park Shasta County |
250 | 1 | 1 | |
|
Mariani Nut Company Buckeye RD Winters · Yolo County |
250 | 0 | 0 | |
|
McPr-Cathey S Valley Park Mariposa County |
250 | 0 | 0 | |
|
Mdf-Medicine Lake Siskiyou County |
250 | 0 | 0 | |
|
Meyers Water Co. Napa County |
250 | 1 | 0 | |
|
Mountain View Mobile Estates, LLC Sonoma County |
250 | 0 | 0 | |
|
Northcrest Mobile Home Park Crescent City · Del Norte County |
250 | 2 | 2 | |
|
Ocean's Edge Estates Mendocino County |
250 | 0 | 0 | |
|
Park Heights Mutual Water CO Stanislaus County |
250 | 0 | 0 | |
|
Parkway Lakes RV Park Santa Clara County |
250 | 1 | 0 | |
|
Plaza Elementary School Glenn County |
250 | 0 | 0 | |
|
Pleasant Ridge School Nevada County |
250 | 0 | 0 | |
|
Plumas Lake Golf & Country Club Yuba County |
250 | 0 | 0 | |
|
Pond School Water System Kern County |
250 | 2 | 1 | |
|
Ram Naam Mandali Church of Modesto Stanislaus County |
250 | 0 | 0 | |
|
Ramona Oaks RV Resort San Diego County |
250 | 4 | 0 | |
|
Ramona Water Company Riverside County |
250 | 3 | 2 | |
|
River Estates Mutual Water Company Mendocino County |
250 | 1 | 1 | |
|
Sacramento Yacht Club Yolo County |
250 | 1 | 0 | |
|
Santa Rosa Golf & Country Club Sonoma County |
250 | 0 | 0 | |
|
Sardine Lake Resort Sierra County |
250 | 0 | 0 | |
|
Shaffer Elementary School Lassen County |
250 | 0 | 0 | |
|
Sierra Cedars Csd Fresno County |
250 | 0 | 0 | |
|
Sierra City Water Works, Inc. Sierra City · Sierra County |
250 | 1 | 0 | |
|
Sierra Pacific Ind Anderson Shasta County |
250 | 0 | 0 | |
|
Sierra View School Madera County |
250 | 1 | 1 | |
|
Skywalker Ranch Marin County |
250 | 0 | 0 | |
|
Soledad Mountain Project Water System Kern County |
250 | 0 | 0 | |
|
Shanel Tribal Utility District County |
250 | 3 | 0 | |
|
V Lions Ops Water System Kern County |
250 | 1 | 0 | |
|
Warner Unified School District San Diego County |
250 | 1 | 0 | |
|
Washington School WS Monterey County |
250 | 0 | 0 | |
|
Wench Creek Campground El Dorado County |
250 | 1 | 0 | |
|
Wishon Village Fresno County |
250 | 0 | 0 | |
|
Wooden Valley Winery Solano County |
250 | 0 | 0 | |
|
Washoe Tribe Woodfords Woodfords · County |
250 | 2 | 1 | |
|
Yosemite Wholesale Merced County |
250 | 0 | 0 | |
|
Del Oro California Pines District Tulare County |
249 | 1 | 1 | |
|
San Jerardo Coop WS Monterey County |
249 | 0 | 0 | |
|
Manny Water System Tulare County |
248 | 2 | 1 | |
|
Santa Ysabel Nature Center San Diego · San Diego County |
248 | 0 | 0 | |
|
Shasta Csa Cragview, #23 Shasta County |
248 | 1 | 0 | |
|
Big Meadow Campground Mono County |
247 | 0 | 0 | |
|
Larrupin Cafe Humboldt County |
247 | 1 | 1 | |
|
Autocamp Sequoia Tulare County |
246 | 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.