All water systems in California
7,380 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Sierra Moon Mutual Water Company Butte County |
330 | 2 | 1 | |
|
Trinity Village Mutual Water Trinity County |
330 | 0 | 0 | |
|
Washington Water District Nevada County |
330 | 3 | 1 | |
|
Navelencia School Fresno County |
329 | 0 | 0 | |
|
Orick C.s.d. Humboldt County |
328 | 0 | 0 | |
|
Pinnacles National Park-West District San Benito County |
328 | 0 | 0 | |
|
Fawn & Stoney Campground Trinity County |
327 | 0 | 0 | |
|
Lincoln Grove Estates Butte County |
327 | 3 | 1 | |
|
Sonoma County Csa 41-Salmon Creek Sonoma County |
327 | 0 | 0 | |
|
Bel Air Mobile Estate San Joaquin County |
325 | 0 | 0 | |
|
Berrendos School Tehama County |
325 | 1 | 1 | |
|
Bidwell Park Golf Course Butte County |
325 | 0 | 0 | |
|
Charleston School Merced County |
325 | 0 | 0 | |
|
Desert Springs Mwc San Bernardino County |
325 | 1 | 0 | |
|
EL Capitan Mutual Water Company Santa Barbara County |
325 | 1 | 1 | |
|
Leisure Lake Mobile Estates Los Angeles County |
325 | 1 | 1 | |
|
Minarets High School Madera County |
325 | 1 | 1 | |
|
Mjusd Foothill Intermediate School Yuba County |
325 | 2 | 2 | |
|
Northwest Prep Charter School Sonoma County |
325 | 1 | 0 | |
|
Sunshine Resort San Bernardino County |
325 | 0 | 0 | |
|
Santa Ysabel Main County |
325 | 0 | 0 | |
|
Twin Lakes Enterprises Mono County |
325 | 0 | 0 | |
|
Woodstock Ranch Santa Barbara County |
325 | 0 | 0 | |
|
Fiero Lane Water Company, Inc. San Luis Obispo County |
324 | 0 | 0 | |
|
Jgw RV Park Shasta County |
324 | 0 | 0 | |
|
Sierra Water Resources Sierra City Sierra County |
324 | 0 | 0 | |
|
Shepherd of the Valley Santa Barbara County |
323 | 0 | 0 | |
|
Siete Robles Mutual Water CO Ventura County |
323 | 1 | 1 | |
|
Joseph Grant County Park Santa Clara County |
322 | 1 | 0 | |
|
Martis Creek-Us Army Corps of Engineers Nevada County |
322 | 0 | 0 | |
|
Pomona Ranch Housing Center Madera County |
322 | 0 | 0 | |
|
Camp Mendocino Mendocino County |
321 | 0 | 0 | |
|
Rockford School Tulare County |
321 | 1 | 0 | |
|
Seven Oaks MT Resort MHP San Bernardino County |
321 | 0 | 0 | |
|
Adesa of Sacramento Sacramento County |
320 | 0 | 0 | |
|
Bethel in the Hills Pcg Camp Kern County |
320 | 0 | 0 | |
|
Double L Mobile Estates San Joaquin County |
320 | 0 | 0 | |
|
Mariani Packing Company, Inc. Solano County |
320 | 0 | 0 | |
|
Palmer Creek Csd Humboldt County |
320 | 4 | 2 | |
|
Saint Marie Mobile Home Park Santa Barbara County |
320 | 1 | 1 | |
|
Santos Ranch PWS #5-Csa #35 San Joaquin County |
320 | 0 | 0 | |
|
Blossom Trail Cafe Fresno County |
318 | 1 | 1 | |
|
EL Dorado Mobile Home Park Sacramento County |
318 | 0 | 0 | |
|
Saputo Dairy Foods Usa, LLC Merced County |
318 | 0 | 0 | |
|
Trail in RV Park Shasta County |
318 | 0 | 0 | |
|
Live Oak Springs Water System San Diego County |
317 | 1 | 1 | |
|
Trinity Lake Marinas, Llc. Trinity County |
317 | 0 | 0 | |
|
Twin Valley INC Santa Clara County |
317 | 1 | 0 | |
|
Cascade Estates Tuolumne County |
316 | 1 | 0 | |
|
Dixieland Elementary School Madera County |
316 | 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.