All water systems in California
284 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Hume Lake Guard Station Fresno County |
5 | 0 | 0 | |
|
Lake Francis Mutual Water CO I Yuba County |
5 | 0 | 0 | |
|
Madera CO Bass Lake Govt Center Madera County |
5 | 1 | 0 | |
|
Chuck S Hidden Lakes Tulare County |
3 | 0 | 0 | |
|
Fresno Cwd #18-Lakeview Estates County |
2 | 0 | 0 | |
|
Blue Lake MH Park Humboldt County |
0 | 0 | 0 | |
|
Castle Lake Nordic Center Siskiyou County |
0 | 0 | 0 | |
|
Crestline Village Cwd Div 20 Lake Gregory · San Bernardino County |
0 | 0 | 0 | |
|
Csp Lake Perris Sra Bernasconi Nc Day Use Camp · Riverside County |
0 | 0 | 0 | |
|
Dry Lake Guard Station County |
0 | 0 | 0 | |
|
East Tulelake Water District Siskiyou County |
0 | 0 | 0 | |
|
Guernette Lakes County |
0 | 0 | 0 | |
|
Lake Morena Trailer Resort County |
0 | 0 | 0 | |
|
Lake School San Benito County |
0 | 0 | 0 | |
|
Lake Solano Park Youth Area Inactive Solano County |
0 | 0 | 0 | |
|
Lake Sonoma Resort Sonoma County |
0 | 0 | 0 | |
|
Lakeport Lagoon MHP Lake County |
0 | 0 | 0 | |
|
Lakeshore Estates MHP Lake County |
0 | 0 | 0 | |
|
Lakeside Heights Mwc Lake County |
0 | 0 | 0 | |
|
Lakeside Market Napa County |
0 | 0 | 0 | |
|
Lakeside Mobile Villa Water County |
0 | 0 | 0 | |
|
Lakeside Water System County |
0 | 0 | 0 | |
|
Lakewood Park Mutual Lake County |
0 | 0 | 0 | |
|
Lakewood Resort County |
0 | 0 | 0 | |
|
Lower Lake Cwd Rancho Sendero Lake County |
0 | 0 | 0 | |
|
Lake Basin Spring, Plumas NF Plumas County |
0 | 0 | 0 | |
|
Russell Valley Mwd Westlake Villag · Los Angeles County |
0 | 0 | 0 | |
|
San Luis Obispo Csa 1g Black Lake Black Lake · San Luis Obispo County |
0 | 0 | 0 | |
|
Shadow Lake Mobile Home Commun Shadow Lake Mob · San Joaquin County |
0 | 0 | 0 | |
|
Spring Lakes MHP Santa Cruz County |
0 | 0 | 0 | |
|
Swan Lake Mobile Home Park County |
0 | 0 | 0 | |
|
Truckee-Donner Pud Donner Lake Nevada County |
0 | 0 | 0 | |
|
Tweedy Lake Corp. Los Angeles County |
0 | 0 | 0 | |
|
Westlake MHP Lake County |
0 | 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.