All water systems in California
284 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Blue Lake Campground Modoc County |
235 | 0 | 0 | |
|
Lake MC Clure Boat Club MHP Mariposa County |
200 | 0 | 0 | |
|
Oak Lake Park Napa County |
200 | 0 | 0 | |
|
Silver Lake Resort 2 County |
200 | 0 | 0 | |
|
East Tule Lake Water Dist Modoc County |
192 | 0 | 0 | |
|
East Tule Lake Water Dist Modoc County |
192 | 0 | 0 | |
|
East Tulelake Water Dist Siskiyou County |
192 | 0 | 0 | |
|
Ronald Lakeman Tulare County |
190 | 0 | 0 | |
|
Lakeshore Bowl Water System Lake County |
180 | 0 | 0 | |
|
Spring Valley Lakes Lake County |
176 | 0 | 0 | |
|
Lakeshore Mutual Water CO Nevada County |
175 | 0 | 0 | |
|
Tuolumne Regional Water Dist. Lakewood · Tuolumne County |
175 | 0 | 0 | |
|
Lake Elsinore Village Riverside County |
170 | 0 | 0 | |
|
Ruth Lake C S D Trinity County |
168 | 0 | 0 | |
|
Lake Cottonwood Mobilehome Par Riverside County |
160 | 0 | 0 | |
|
Usfs-Toiyabe, Chas Napes Bldg Trumbull Lake C · Sutter County |
160 | 0 | 0 | |
|
Tud Phoenix Lake Park Tuolumne County |
157 | 0 | 0 | |
|
Csp Lake Oroville-Loafer Creek County |
153 | 0 | 0 | |
|
Blue Lake Youth Camp Lassen County |
150 | 0 | 0 | |
|
Camp Minkalo Silver Lake Amador County |
150 | 0 | 0 | |
|
Lake MC Clure Boat Club MHP Mariposa County |
150 | 0 | 0 | |
|
Visalia Citrus Packers-Woodlake Tulare County |
150 | 0 | 0 | |
|
Yosemite Nps-Merced Lake Camp Mariposa County |
150 | 0 | 0 | |
|
Oakwood Lake Mobile Home Park San Joaquin County |
148 | 1 | 1 | |
|
Lakeview Water & Improv Assn San Bernardino County |
147 | 1 | 1 | |
|
Hume Lake Christian Camp Tulare County |
135 | 0 | 0 | |
|
The Blakeney WS at Rancho EL Jabali Santa Barbara County |
135 | 0 | 0 | |
|
Lake County Csa 16 Paradise Valley Lake County |
133 | 0 | 0 | |
|
Cammanche Lake South Shore El Dorado County |
130 | 0 | 0 | |
|
Campo Lake Properties Ltd San Diego County |
120 | 0 | 0 | |
|
Lakeside Community Hospital Lake County |
120 | 0 | 0 | |
|
Amador Water Agency-Lake Camanche Wwtp-C Amador County |
100 | 0 | 0 | |
|
Canyon City Lakes San Diego County |
100 | 0 | 0 | |
|
Convict Lake Store County |
100 | 0 | 0 | |
|
Crestwood Lakes Recrea Ranch San Diego County |
100 | 0 | 0 | |
|
Eagle Lake Marina Lassen County |
100 | 0 | 0 | |
|
Finnon Lake Resort County |
100 | 0 | 0 | |
|
Hensley Lake Headquarters Madera County |
100 | 0 | 0 | |
|
Honey Lake Assembly of God County |
100 | 0 | 0 | |
|
Horseshoe Lake Campground 2 County |
100 | 0 | 0 | |
|
Lake Mary Store Mono County |
100 | 0 | 0 | |
|
Lake Mary Store Mono County |
100 | 0 | 0 | |
|
Lake Ridge Resort Lake County |
100 | 0 | 0 | |
|
Ruth Lake Store Humboldt County |
100 | 0 | 0 | |
|
Twin Lake Rec Resort Park San Bernardino County |
100 | 0 | 0 | |
|
Virginia Lakes Resort County |
100 | 0 | 0 | |
|
Lakeview Motel County |
99 | 0 | 0 | |
|
Sun Pacific-Woodlake Tulare County |
95 | 1 | 1 | |
|
Upper Lake Dewell System County |
93 | 2 | 2 | |
|
Lakeside Village MHP Lake County |
90 | 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.