Tapcensus

Water quality in Winchester, California

Winchester is in Riverside County. 198 active public water systems serve the county; 66 had an EPA violation in the past three years.

Most likely your provider

Eastern Municipal WD CA3310009 · Community water system · Surface water purchased
Serves 659,923 people Rules violated, past 3 years 0 Distance 1.7 mi

Your location is within the outer bounds of this system's EPA service area.

View system details EPA facility report

Other community water systems in Riverside County

93 systems, nearest first
SystemServesStatusRules violated, 3 yrDistance
Hemet, City of
Hemet		 33,591 0 5.8 mi
Nuevo Water Company
 6,733 0 7.3 mi
San Jacinto, City of
San Jacinto		 20,938 0 8.3 mi
Lake Hemet Mwd
 52,913 0 9.7 mi
Golden Era Productions
 500 0 9.8 mi
Indian Oaks Trailer Park
 5 0 10.6 mi
Farm Mutual W.c. (the)
 4,026 1 10.6 mi
Bautista CC No. 36
 73 3 11.5 mi
Murrieta Palms Mobile Home Park
 237 1 13.3 mi
Western Mwd Murrieta Division
 17,837 0 13.7 mi
Elsinore Valley Mwd
 169,455 0 14.4 mi
Harmony Haven
 69 0 14.8 mi
Rancho California Water District
 146,147 0 14.8 mi
Plantation on the Lake Park
 885 0 17.0 mi
Beaumont Cherry Valley WD
 66,841 0 17.5 mi
Fisherman's Retreat
 352 1 17.9 mi
High Valleys Water District
 733 3 18.0 mi
Rancho Calimesa Mobile Home Park
 296 0 18.1 mi
Box Springs Mutual WC
 3,382 1 18.5 mi
Sharondale Mesa HOA
 340 3 18.6 mi
Western Mwd
 87,955 0 18.9 mi
Banning, City of
Banning		 31,680 0 19.0 mi
Oak Haven Association
 120 0 19.0 mi
Pine Cove Water District
 1,540 0 19.1 mi
Western Mwd (id a Rainbow)
 196 0 19.3 mi
All 94 community water systems in Riverside County
Non-community systems in Riverside County (104: schools, campgrounds, workplaces, restaurants)

These systems serve places you visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
Diamond Valley Market Water
 2,195 1 0
Tucalota Springs R.v. Park
 208 0 0
Elsinore Hills RV Park
 45 0 0
Country Hills RV Park
 415 0 0
Desert Sage Youth Wellness Center
Hemet 		70 0 0
Morongo Golf Course at Tukwet Cnyn
 185 0 0
Cherry Valley Ranch LLC
 135 0 0
Temecula/vail Lake KOA
 1,123 0 0
Sundance Meadows
 73 0 0
Vista Grande Station Usfs
 30 2 1
Lake Fulmor Usfs
 125 0 0
Kkottongnae Retreat Camp
 79 0 0
Dripping Springs Cg Usfs
 65 0 0
Cottonwood School
 202 0 0
Twin Pines Boys Ranch
 30 0 0
McCall Park Riv.county Parks
 53 1 0
Alhatti Christian Mountain Res
 40 0 0
MT San Jacinto ST Park (stone Creek)
 150 0 0
Lawler Park Riv.county Parks
 26 1 0
Chapel in the Pines
 80 0 0
Idyllwild Pines Camp
 85 0 0
Marion Mtn/ Fern Basin Usfs
 40 0 0
Camp Maranatha
 83 1 0
Stagecoach Inn
 1,006 0 0
Azalea Trails Girl Scouts Camp
 50 0 0
Keenwild Station Usfs
 30 1 0
Elim Foolish Pleasure
 104 0 0
Grace Korean Church
 50 0 0
Tahquitz Pines
 59 0 0
Jojoba Hills Skp Resort, Inc.
 912 1 1
Hurkey Creek Riv. Co. Parks
 756 1 0
Cahuilla Mountain Market & Cafe
 57 1 0
Camp Ronald McDonald for G.t.
 202 0 0
Maverik Fueling Station
Riverside 		129 0 0
Pine Springs Ranch
 68 1 0
C21 Anza
 66 0 0
Anza Petroleum INC
 115 1 1
LA Cocina
 24,524 0 0
LA Plata Water System
 60 0 0
Hamilton School
 705 0 0
Spartan Veterinary Services
 700 1 0
Palm Springs Aerial Tramway
 1,530 0 0
Valley Auto Water
 5,215 0 0
Anza Baptist Church
 80 0 0
Camp Joe Scherman
 105 0 0
Hidden Valley Nature Center
 1,210 0 0
Terwilliger Association
 2,401 0 0
Paradise Valley Cafe
 58 0 0
Whitewater Preserve
 503 0 0
Goose Creek Golf Club
 28 0 0
All non-community systems
About this data

Water systems are matched to Riverside County, nearest to Winchester first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system or, for systems without one, to the centre of the first town EPA lists the system as serving, from Census Bureau place files.

Town locations and ZIP code areas come from U.S. Census Bureau 2020 files.

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. Retrieved from ECHO on Oct 11, 2026.