All water systems in California
123 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Sierra Army Depot Herlong Herlong Army Ba · San Benito County |
1,700 | 0 | 0 | |
|
Sierra Conservation Center Tuolumne County |
1,500 | 0 | 0 | |
|
Sierra Conservation Center Tuolumne County |
1,500 | 0 | 0 | |
|
Sierra Pines Riverside County |
555 | 0 | 0 | |
|
Sierra Cedars Community Fresno County |
455 | 0 | 0 | |
|
Sierra Pacific Industries Tehama County |
450 | 0 | 0 | |
|
Placerville, City of Sierra Golf & CC El Dorado County |
320 | 0 | 0 | |
|
Sierra Road Improvement Association INC Santa Clara County |
280 | 1 | 0 | |
|
Camp HI Sierra County |
200 | 0 | 0 | |
|
Sierra Bible Camp Plumas County |
200 | 0 | 0 | |
|
Sierra Trails Lodge Kern County |
198 | 0 | 0 | |
|
Sierra Elementary School Fresno County |
190 | 0 | 0 | |
|
Camp Wasiu Ii, Sierra/nv Inc. Sierra County |
160 | 0 | 0 | |
|
Sierra Park Los Angeles County |
158 | 0 | 0 | |
|
Sierra Club Nevada County |
150 | 0 | 0 | |
|
Sierra Nevada Building El Dorado County |
150 | 0 | 0 | |
|
YMCA Camp High Sierra Mono County |
150 | 0 | 0 | |
|
Sierra College Placer County |
120 | 0 | 0 | |
|
Sierra Pacific Lumber Mill County |
120 | 0 | 0 | |
|
Sierra Knolls Winery Water System Nevada County |
110 | 0 | 0 | |
|
Sierra Montessori Academy Nevada County |
100 | 0 | 0 | |
|
High Sierra Springs County |
99 | 0 | 0 | |
|
Sierra Village Tuolumne County |
91 | 0 | 0 | |
|
Sierra Shadows Mobile Manor County |
84 | 0 | 0 | |
|
Sierra Skies R V Park Sierra County |
80 | 0 | 0 | |
|
Sierra Pines Mobilehome Park El Dorado County |
75 | 0 | 0 | |
|
Sierra Valley Sun INC County |
75 | 0 | 0 | |
|
Park Sierra MHP County |
73 | 0 | 0 | |
|
Sierra Lakes Christian Ministries Tulare County |
62 | 0 | 0 | |
|
Sierra Meadows Hospital County |
60 | 0 | 0 | |
|
Sierra Pacific Mgt Corp Sutter County |
60 | 0 | 0 | |
|
Sierra Six Motel Riverside County |
57 | 0 | 0 | |
|
Sierra Super Stop #3 County |
51 | 0 | 0 | |
|
Cal Sierra Developments Yuba County |
50 | 0 | 0 | |
|
Sierra Gables Motel County |
50 | 0 | 0 | |
|
Sierra Garden Apartments Mariposa County |
50 | 0 | 0 | |
|
Sierra Hilton County |
50 | 0 | 0 | |
|
Sierra Mobilehome Ranch County |
50 | 0 | 0 | |
|
Sierra Truck Stop & Motel Los Angeles County |
50 | 0 | 0 | |
|
Sierra View Golf Course County |
50 | 0 | 0 | |
|
Sierra Vista Mobile Home Park Tulare County |
50 | 0 | 0 | |
|
Sierra Vista Restaurant Kern County |
50 | 1 | 0 | |
|
Sierra View School Stanislaus County |
45 | 0 | 0 | |
|
Sierra Land Associates Sierra County |
40 | 0 | 0 | |
|
Sierra Mobile Lodge Mariposa County |
40 | 1 | 1 | |
|
Sierra Mobile Lodge Mariposa County |
40 | 0 | 0 | |
|
Sierra School Tulare County |
40 | 0 | 0 | |
|
Sierra Vista/circle K Ranch Fresno County |
40 | 0 | 0 | |
|
U.s.f.s. High Sierra Campground County |
40 | 0 | 0 | |
|
Sierra Tahoe Ski Resort El Dorado County |
39 | 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.