All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Christian Berets Conf. Center Tuolumne County |
268 | 0 | 0 | |
|
DI Giorgio School Water System Kern County |
268 | 3 | 0 | |
|
Artois Community S.d. Glenn County |
267 | 0 | 0 | |
|
Hood Water Maintence Dist [sws] Sacramento County |
267 | 1 | 1 | |
|
Park Moabi San Bernardino County |
267 | 1 | 1 | |
|
River Reflections Estates County |
267 | 0 | 0 | |
|
Nvusd: Stonebridge School Napa County |
266 | 0 | 0 | |
|
Bob's Tiny Mart Tulare County |
265 | 1 | 0 | |
|
Nestldown Ranch Santa Clara County |
265 | 0 | 0 | |
|
Ridgewood Water System Mendocino County |
265 | 0 | 0 | |
|
The Cottages at Tenaya Lodge Mariposa County |
265 | 0 | 0 | |
|
Clements Water Works #43 San Joaquin County |
264 | 0 | 0 | |
|
Hope Elementary School District Tulare County |
264 | 1 | 0 | |
|
Jpd Regional Police Training Center Fresno County |
264 | 0 | 0 | |
|
Lakeshore Heights Mutual Water Shasta County |
264 | 0 | 0 | |
|
MD 08 North Fork Water System Madera County |
264 | 1 | 0 | |
|
Navajo Mwc San Bernardino County |
264 | 0 | 0 | |
|
Sierra Village Mutual Water CO Tuolumne County |
264 | 1 | 0 | |
|
Cws Lakeland Kern County |
263 | 0 | 0 | |
|
June Lake Pud Village Mono County |
263 | 1 | 1 | |
|
Naco West Russian River Preserve Sonoma County |
263 | 0 | 0 | |
|
Trinchero Winery Napa County |
263 | 0 | 0 | |
|
Eleven Oaks Mobile Home Community Sacramento County |
262 | 1 | 1 | |
|
Berryessa Pines Water System Napa County |
261 | 2 | 1 | |
|
Central Camp Water Company Madera County |
261 | 0 | 0 | |
|
Shasta CO Csa # 8 Palo Cedro Shasta County |
261 | 1 | 0 | |
|
Golden State Water CO San Juan Oaks San Benito County |
260 | 0 | 0 | |
|
Happy Acres Mutual Benefit Water System Sonoma County |
260 | 0 | 0 | |
|
Los Tules Mutual Water Company San Diego County |
260 | 1 | 0 | |
|
Oakvale Park San Diego County |
260 | 3 | 0 | |
|
Ophir Elementary School Water System Placer County |
260 | 0 | 0 | |
|
Riverland Mobilehome Park Shasta County |
260 | 0 | 0 | |
|
The Summit Shasta County |
260 | 0 | 0 | |
|
Whispering Oaks Program Center San Diego County |
260 | 0 | 0 | |
|
Vineyard Mutual Water Company/industrial Ventura County |
259 | 0 | 0 | |
|
Camp Sugar Pine Madera County |
258 | 0 | 0 | |
|
Field Sports Park/coyote Ranch Santa Clara County |
258 | 0 | 0 | |
|
Kerman Event Center Kerman · Fresno County |
258 | 0 | 0 | |
|
Saratoga Heights Mutual Water Company Santa Clara County |
258 | 0 | 0 | |
|
Lds Church Merced Merced · Merced County |
257 | 0 | 0 | |
|
Green Acres Trailer Park Mendocino County |
256 | 0 | 0 | |
|
Sce/camp Edison-Shaver Fresno County |
256 | 0 | 0 | |
|
Cal 20 Village and Meadow Pointe Park Lake County |
255 | 0 | 0 | |
|
Ccwd Wallace Calaveras County |
255 | 0 | 0 | |
|
Dowville Tract Association Fresno County |
255 | 0 | 0 | |
|
Gill Sidhu Chevron Solano County |
255 | 0 | 0 | |
|
Newberry Elementary School San Bernardino County |
255 | 0 | 0 | |
|
River Bend Resort Sonoma County |
255 | 0 | 0 | |
|
Irish Beach Water District Mendocino County |
254 | 1 | 1 | |
|
Nps Kelso Depot San Bernardino County |
254 | 1 | 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.