Tapcensus

All water systems in California

7,380 systems

SystemServesStatusRules violated, 3 yrUnresolved
County Service Area 11
San Mateo County 		450 0 0
Glass House Camarillo Cultivation, LLC
Ventura County 		450 0 0
Glen Martin Mwc
San Bernardino County 		450 1 1
Golden Sands Mobile Home Park
Los Angeles County 		450 1 1
Ilead Agua Dulce Charter School
Los Angeles County 		450 1 1
Lassen County Water Works District #1
Lassen County 		450 1 1
Lighthouse Marina Restaurant & Resort
Sacramento County 		450 0 0
Madera MH & RV Park
Madera County 		450 5 0
Mother Truckers Water System
Nevada City · Nevada County 		450 0 0
Olympia Mobilodge
Sacramento County 		450 0 0
Pacheco Elementary School
Shasta County 		450 0 0
Primex Farms Water System
Kern County 		450 1 0
Shadow Acres Mutual Water Company
Los Angeles County 		450 0 0
Sierra Pacific Industries Red Bluff MI
Tehama County 		450 0 0
Trinity Presbyterian Church
Fresno County 		450 0 0
Usda-Forest Service Princess Campground
Fresno County 		450 0 0
Yosemite Nps-Bridalveil Creek CG
Mariposa County 		450 0 0
Lake County Csa 13 Kono Tayee
Lake County 		449 0 0
Warner Springs Estates
San Diego County 		448 0 0
Weott C.s.d.
Humboldt County 		448 2 1
Edwards Afb Air Force Research Lab
Kern County 		446 0 0
Antelope Park Mutual Water Company
Los Angeles County 		445 0 0
Coast Springs Cal. Water Service (puc)
Marin County 		445 0 0
MI Wuk Heights Mwc
Tuolumne County 		445 0 0
Rivergold Elementary School
Madera County 		444 0 0
Casini Ranch Campground
Sonoma County 		442 0 0
Convict Lake Campground
Mono County 		440 0 0
Fcsa 49 Five Points
Fresno County 		440 0 0
Garden Farms C.w.d.
San Luis Obispo County 		440 1 1
Hayward Flat Campground
Trinity County 		440 0 0
Bennett Ridge Mutual Water Company
Sonoma County 		439 0 0
Psmcsd Vega RD WS #01
Monterey County 		438 0 0
Son Shine Properties
Kern County 		438 2 1
City of Tehama
Tehama · Tehama County 		436 0 0
Sunnyside Farms Mutual Water Company
Los Angeles County 		436 3 1
EL Rio Estates
Shasta County 		434 1 1
Stockdale Annex Mutual Water
Kern County 		433 1 0
Usfs Beardsley Picnic Ground
Tuolumne County 		432 0 0
Yolo CO Housing Authority-El Rio Villa
Yolo County 		432 0 0
California Pines C.s.d.
Modoc County 		431 1 1
Csp-Pt. Cabrillo Light Station Shp
Mendocino County 		430 0 0
Delicato Vineyards
San Joaquin County 		430 0 0
Sky View County Water
Tehama County 		429 2 1
Strickland Mutual Water Company
Ventura County 		429 0 0
Morada Estates N PWS #46
San Joaquin County 		426 0 0
Albion River Campground
Mendocino County 		425 0 0
Dp&r Castle Crags SP
Shasta County 		425 0 0
Ward Well Water Company
Placer County 		425 0 0
Usmc Housing Coleville
Mono County 		424 3 0
Cosumnes River Elementary School
Sacramento County 		423 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.