Tapcensus

Water quality in Modesto, California

Modesto is in Stanislaus County. 192 active public water systems serve the county; 68 had an EPA violation in the past three years.

Most likely your provider

Modesto, City of CA5010010 · Community water system · Surface water purchased · Modesto
Serves 218,915 people Rules violated, past 3 years 0 Last sanitary survey Jan 31, 2025 Distance 4.2 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 Stanislaus County

60 systems, nearest first
SystemServesStatusRules violated, 3 yrDistance
City of Modesto Walnut Manor
Modesto		 178 0 1.9 mi
Ceres, City of
Ceres		 54,513 1 2.5 mi
Hughson, City of
Hughson		 7,977 2 3.4 mi
Sunrise Village MHP
 339 1 4.0 mi
Riverview Mobile Home Estates
 540 2 4.2 mi
Keyes Community Services Dist.
 5,672 0 4.3 mi
Country Villa Apts
 60 1 4.4 mi
Cobles Corner
 50 1 4.5 mi
Modesto Irrigation District
 0 0 4.6 mi
Olive Lane Mobilehome Park
 153 0 6.0 mi
Riverdale Park Tract Csd
 610 1 6.3 mi
Country Western Mhrv
 55 1 6.8 mi
Morningside Mobilehome Park
 67 0 6.8 mi
Riverbank, City of
Riverbank		 25,625 0 7.4 mi
Oasis Investments
 75 1 7.5 mi
City of Modesto North Turlock
Modesto		 172 0 8.0 mi
Monterey Park Tract Csd
 186 1 8.1 mi
Tully Mobile Estates
 56 0 8.4 mi
Park Heights Mutual Water CO
 250 0 8.5 mi
Lazy B Mobilehome Park
 125 1 8.7 mi
Turlock, City of
Turlock		 72,888 0 8.8 mi
City of Waterford
Modesto		 8,788 0 8.8 mi
City of Modesto Central Turlock
Modesto		 119 0 8.9 mi
Waterford Hickman
Modesto		 597 0 9.3 mi
Denair Community Services District
 5,093 0 9.4 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
Lakewood Memorial Park & Funeral Home
 40 1 1
Sikh Temple Modesto-Ceres
 97 0 0
Duarte Nursery INC Water System
 75 2 1
River Oaks/kingdom Hall
 500 0 0
Hughson Nut Company Water System
 110 0 0
Grace Community Christian Church
 70 0 0
Modesto Christian Center (watersystem)
 25 0 0
Fee Water System
 25 0 0
Fox Grove Fishing Access
 26 0 0
Mid Valley Nut CO
Hughson 		60 3 2
The Fruit Yard Restaurant
 43 1 1
J & J Farm Fresh Produce & Bakery
 25 0 0
Growers Direct Nut Company
 25 0 0
Ram Naam Mandali Church of Modesto
 250 0 0
Keyes 76 (water System)
 25 0 0
Resendiz Fruit Barn
 25 0 0
Joe's Food Mart Water System
 26 0 0
Bel Passi Baseball
 25 0 0
Bronco Winery
 400 0 0
Golden Arco
 28 0 0
Rainbow Sports Complex
 25 0 0
West Coast Sand & Gravel
 25 1 1
Jehovah's Witness Sierra Vista Cong
 500 0 0
Covenant Grove Church
 300 0 0
Greenlaw Modesto Investors LLC
 142 0 0
At&t Water System
 80 1 1
Lander Veterinary Clinic
 27 0 0
Riverbank Lra
 156 1 1
Liberty Baptist Church
 45 1 0
Frazier Nut Farms, Inc.
 64 1 0
Ceres Unified/westport School
 450 2 0
Paradise School
 218 0 0
Kiernan/mchenry Water Company, INC
 25 0 0
Stratos Way Water Company, INC
 135 0 0
Nino's Place Water System
 25 0 0
Los Indios Water System
 25 0 0
Libitzky
 120 1 1
California Nut Company
 30 1 1
Zansco
Modesto 		25 0 0
5033 Pentecost
 302 0 0
Pentecost Properties Water System
 25 0 0
Gratton School
 141 0 0
Charity Way Water System
Modesto 		25 1 1
Kiernan Business Center
 120 0 0
Sterling Industrial
 35 1 1
Elks Lodge 1282
 25 0 0
Salida Hulling Association Water System
 25 0 0
McHenry Business Park
 27 2 1
Storer Transportation
 40 1 0
5801 McHenry Ave
 26 0 0
All non-community systems
About this data

Water systems are matched to Stanislaus County, nearest to Modesto 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.