All water systems in California
2,996 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Lo-Fi Winery Santa Barbara County |
413 | 1 | 0 | |
|
Yosemite Lakes Campground Tuolumne County |
413 | 1 | 0 | |
|
Tannery Gulch Campground Trinity County |
410 | 0 | 0 | |
|
Christian Life Assembly Water System Kern County |
406 | 0 | 0 | |
|
Camp Cedar Falls San Bernardino County |
405 | 0 | 0 | |
|
Csp Red Rock Canyon Kern County |
404 | 0 | 0 | |
|
Joshua Tree NP Black Rock Canyon Riverside County |
404 | 0 | 0 | |
|
Thousand Trails Oakzanita Inc. San Diego County |
404 | 0 | 0 | |
|
JH Ranch Siskiyou County |
403 | 0 | 0 | |
|
Csp-Goat Rock State Beach Sonoma County |
402 | 0 | 0 | |
|
Josan and Josan, Inc. Fresno County |
402 | 1 | 0 | |
|
Mooney Grove Park Tulare County |
402 | 0 | 0 | |
|
Stone Lagoon-State Parks Humboldt County |
402 | 0 | 0 | |
|
Kern CO P&r-Lake Woollomes Water System Kern County |
401 | 0 | 0 | |
|
Acton la North KOA Los Angeles County |
400 | 0 | 0 | |
|
Agua Caliente County Park San Diego County |
400 | 0 | 0 | |
|
Angora Lakes Resort El Dorado County |
400 | 0 | 0 | |
|
Bonita Ranch RV Campground San Bernardino County |
400 | 1 | 0 | |
|
Bsa/camp Chawanakee Fresno County |
400 | 0 | 0 | |
|
Caltrans-Salyer Safety Rest Stop Trinity County |
400 | 1 | 0 | |
|
Csp-Mendocino Woodlands Mendocino County |
400 | 0 | 0 | |
|
Gold Arrow Camp Fresno County |
400 | 0 | 0 | |
|
KQ Ranch Resort San Diego County |
400 | 0 | 0 | |
|
Lakeport Cinemas Lake County |
400 | 0 | 0 | |
|
Morning Star Lake Resort Placer County |
400 | 0 | 0 | |
|
Moss Cove Rest Stop (caltrans) Mendocino County |
400 | 0 | 0 | |
|
Neighborhood Church Anderson Cottonwood Anderson · Shasta County |
400 | 0 | 0 | |
|
Ocotillo RV Resort Imperial County |
400 | 1 | 0 | |
|
Pinezanita Inc. San Diego County |
400 | 0 | 0 | |
|
Vines R.v. Resort San Luis Obispo County |
400 | 0 | 0 | |
|
Wienerschnitzel San Joaquin County |
400 | 0 | 0 | |
|
Spring Creek Tract Association El Dorado County |
389 | 2 | 0 | |
|
Berkeley Tuolumne Camp Tuolumne County |
380 | 1 | 0 | |
|
Younglife Woodleaf Yuba County |
378 | 0 | 0 | |
|
Berryessa Brewing Company Winters · Yolo County |
375 | 0 | 0 | |
|
Usda-Forest Service Hume Lake Campground Fresno County |
375 | 0 | 0 | |
|
Usfs Hungry & Boulder Gulch Campground Kern County |
375 | 0 | 0 | |
|
Csp-Westport State Beach Mendocino County |
370 | 0 | 0 | |
|
Burlington Cg-State Parks Humboldt County |
368 | 0 | 0 | |
|
Foley Estates Winery Santa Barbara County |
366 | 0 | 0 | |
|
Usfs Baker/deadman Cgd Tuolumne County |
366 | 1 | 0 | |
|
Nps Prns Five Brooks Marin County |
365 | 0 | 0 | |
|
Usfs/lassen Hat Creek Campgrnd Shasta County |
365 | 0 | 0 | |
|
Mount Diablo State Park Contra Costa County |
364 | 0 | 0 | |
|
South Coast Inn Santa Barbara County |
363 | 0 | 0 | |
|
Hidden Pines Campground Mendocino County |
362 | 0 | 0 | |
|
Yosemite RV Resort Madera County |
361 | 0 | 0 | |
|
Fowlers Campground-Stnf Siskiyou County |
360 | 0 | 0 | |
|
Csp Angel Island ST Park Marin County |
353 | 0 | 0 | |
|
Peninsula Recreation Area El Dorado County |
353 | 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.