Tapcensus

Water quality for ZIP code 95363

ZIP 95363 covers Patterson, Diablo Grande, Grayson, Westley, and Modesto in Stanislaus County, California, one of 25 ZIP codes in the county. 192 active public water systems serve the county; 68 had an EPA violation in the past three years.

Most likely your provider

Western Hills Water District/diablo Gran CA5010039 · Community water system · Surface water
Serves 2,000 people Rules violated, past 3 years 0 Last sanitary survey Apr 16, 2025 Distance 3.6 mi
View system details EPA facility report

Other community water systems in Stanislaus County

60 systems, nearest first
SystemServesStatusRules violated, 3 yrDistance
Patterson, City of
Patterson		 24,977 0 4.5 mi
Hillsview Homes
 887 1 6.4 mi
Westley Csd
 70 1 6.8 mi
City of Modesto Grayson
Modesto		 917 0 8.2 mi
Crows Landing Comm Svc District
 500 2 9.6 mi
Buehner Water System
 150 0 10.1 mi
Buehner Houses
 25 0 11.7 mi
Monterey Park Tract Csd
 186 1 13.0 mi
Country Western Mhrv
 55 1 13.7 mi
City of Newman-Water Department
Newman		 12,389 1 14.7 mi
Martin's Mobile Home Court
 60 2 15.1 mi
Riverdale Park Tract Csd
 610 1 15.2 mi
Fisherman's Bend MHP
 120 0 15.3 mi
Sunrise Village MHP
 339 1 17.6 mi
Ceres, City of
Ceres		 54,513 1 18.0 mi
City of Modesto Walnut Manor
Modesto		 178 0 18.7 mi
Keyes Community Services Dist.
 5,672 0 18.9 mi
City of Modesto Salida
Modesto		 14,576 0 19.4 mi
Modesto, City of
Modesto		 218,915 0 19.7 mi
Modesto Irrigation District
 0 0 20.0 mi
Turlock, City of
Turlock		 72,888 0 20.9 mi
City of Modesto North Turlock
Modesto		 172 0 21.5 mi
Tully Mobile Estates
 56 0 21.8 mi
Mulberry MHP
 148 1 21.9 mi
City of Modesto Central Turlock
Modesto		 119 0 21.9 mi
All 61 community water systems in Stanislaus County
Non-community systems in Stanislaus County (131: schools, campgrounds, workplaces, restaurants)

These systems serve places you visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
Patterson Cemetery District
Patterson 		37 0 0
Joe's Travel Plaza (eh)
 26 0 0
Gawfco Enterprises, Inc.
 26 0 0
Westley Property LLC
 25 0 0
Triangle Truck Stop (water)
 25 1 0
Fink Road Landfill Stanislaus
 31 0 0
New Hope Church of the Nazarene
 70 0 0
Frank Raines Park Ohv
 26 0 0
Jennings Wwtp
 30 1 1
Department of Transportation
 1,000 0 0
Rbvon
 50 0 0
Darling Ingredients Turlock
 43 1 1
California Transplants LLC
 25 0 0
Turlock Sportsman's Club
 32 0 0
Shiloh-Paradise Baseball for Youth
 26 1 0
The Morning Star Company
 200 0 0
Shiloh School District
 105 1 0
Mountain View Elementary School
 170 2 1
Taqueria Rancho Alegre
 26 0 0
Oasis Market
 25 1 0
Farmers' Den /market
 26 1 0
Mountain View Chatom Recreation
 25 0 0
Ceres Unified/westport School
 450 2 0
Eastin
 26 2 0
Cebro Frozen Foods (eh)
 70 0 0
Hamlet Motel
 26 1 0
Beckley Lyons Water System
 26 0 0
Fisher Nut
 25 0 0
Smart Stop Food Mart (eh)
 26 0 0
Joe's Food Mart Water System
 26 0 0
Bronco Winery
 400 0 0
Log Cabin
 26 0 0
Paradise School
 218 0 0
Salida Hulling Association Water System
 25 0 0
Chatom School (eh)
 385 1 1
Ratto Bros, INC
 110 0 0
Chemurgic Agricultural Chemicals, Inc.
 42 2 2
Hart Ransom Union School & District
 650 0 0
Wood Colony Christian School
 90 1 1
Storer Transportation
 40 1 0
4937 Beckwith Water System
 26 0 0
Greenlaw Modesto Investors LLC
 142 0 0
At&t Water System
 80 1 1
Country Store Water System
 25 0 0
Brethren Heritage School, INC
 55 2 2
Grace Community Christian Church
 70 0 0
Keyes 76 (water System)
 25 0 0
Fee Water System
 25 0 0
Golden Arco
 28 0 0
Our Lady of Assumption Church
 1,000 0 0
All non-community systems
About this data

Water systems are matched to Stanislaus County, the county this ZIP code lies in, nearest to the ZIP code's centre 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.

ZIP code areas and town boundaries come from the U.S. Census Bureau's 2020 ZCTA 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.