Tapcensus

All water systems in California

7,380 systems

SystemServesStatusRules violated, 3 yrUnresolved
Holt of California
Sutter County 		144 0 0
Oid #45
Stanislaus County 		144 0 0
Panorama Heights Prop Owners
Tulare County 		144 0 0
Sierra Pacific Industries
Tuolumne County 		144 1 0
Palomar Mtn. SP Silvercrest
San Diego County 		143 0 0
Siskiyou Co.service Area #5/carrick
Siskiyou County 		143 2 2
East Valley Farms Mutual Water Company
Santa Barbara County 		142 1 0
Four Jeffrey Campground
Inyo County 		142 1 0
Greenlaw Modesto Investors LLC
Stanislaus County 		142 0 0
Hope Family Wines Water System
County 		142 0 0
Kennon Water Company
Santa Clara County 		142 1 1
Magnolia Union School
Imperial County 		142 2 0
Pine Grove Mobile Home Park
Del Norte County 		142 2 2
White Mountain Mutual Water Company
Mono County 		142 0 0
Gratton School
Stanislaus County 		141 0 0
Shasta Lake RV Resort
Shasta County 		141 0 0
American Legion Post #376
Calaveras County 		140 0 0
Bayer Research and Development LLC
Yolo County 		140 0 0
Cal Fire Valley View C.c
Glenn County 		140 0 0
Courtright Lake Village
Fresno County 		140 0 0
Desert Palms Mobile Home Park
Los Angeles County 		140 1 1
Farrar Park Property Owners
Contra Costa County 		140 0 0
Harris Farms Headquarters
Fresno County 		140 2 1
Hilltop Ranch Turlock Road
Merced County 		140 0 0
Lake Cove Resort
Plumas County 		140 0 0
Maher Mutual Water Company
Kern County 		140 0 0
Maywood Mobile Home Park
Tehama County 		140 2 2
Northshore RV Resort INC
San Bernardino County 		140 2 0
NS Mini Mart
Tulare County 		140 1 0
Orland Lds Church
Orland · Glenn County 		140 0 0
Rio Viento RV Camp [sws]
Sacramento County 		140 0 0
Susan River Park Water Co.
Lassen County 		140 0 0
Terra Nova Mobile Home Park
Los Angeles County 		140 0 0
Treehouse California Almonds LLC
Tulare County 		140 0 0
Turtle Beach & Water System
San Joaquin County 		140 0 0
Wynola Water District
San Diego County 		140 2 1
Gran Cielo Mutual Water Company
San Simeon · San Luis Obispo County 		139 0 0
Matanzas Creek Winery
Sonoma County 		139 0 0
Cws Mullen Water Company
Tulare County 		138 0 0
Elkhorn Boat Launch [sws]
Sacramento County 		138 0 0
Harvest Moon Mutual Water CO
Kern County 		138 0 0
Lake Tulloch Campgrd & Marina
Tuolumne County 		138 0 0
Oakhurst Mobile Home Estates
Madera County 		138 0 0
Plainview Mwc Central Water
Tulare County 		138 2 2
Sierra Grande Estates Mutual Water Co.
Inyo County 		138 0 0
Sportsmans Paradise
Imperial County 		138 1 0
Trinity Knolls Mutual Water Company
Trinity County 		138 2 2
Cedar Valley Mutual Water CO
Madera County 		137 2 1
EL Nido Mobile Home Park
Merced County 		137 1 0
Round Valley Hidden Oaks Casino and Restaurant
County 		137 6 2
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.