Tapcensus

Water quality in Ontario, Ohio

Ontario is in Richland County. 118 active public water systems serve the county; 40 had an EPA violation in the past three years.

Most likely your provider

Ontario City OH7003512 · Community water system · Ground water
Serves 6,756 people Rules violated, past 3 years 2 Last sanitary survey Feb 21, 2025 Distance 0.6 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 Richland County

46 systems, nearest first
SystemServesStatusRules violated, 3 yrDistance
Aqua Ohio Mansfield System #05
 123 0 2.8 mi
Briarwood Estates MHP
 222 1 2.8 mi
Peyton Community Well
 149 1 3.6 mi
Aqua Ohio Mansfield System #01
 813 1 3.7 mi
Cornell Abraxas Ohio
 150 0 4.4 mi
Mansfield City
 51,000 4 4.6 mi
Southern Estates Water Assoc PWS
 150 0 5.4 mi
Hanley Village Water Association
 95 0 6.2 mi
Lexington Village
 4,825 2 6.3 mi
Walnut Hills Water Association
 583 1 6.6 mi
Forest Hills MHP
 78 0 6.6 mi
Hanley Acres Water Association
 85 0 6.7 mi
Colonial Hills MHP
 185 1 6.7 mi
Aqua Ohio Mansfield System #04
 142 0 7.4 mi
Expressview Comm Water Association
 300 0 7.6 mi
Aqua Ohio Mansfield System #06
 412 0 7.6 mi
Hillsdale Community Water Association PW
 160 0 7.8 mi
Eastview Community Water Association
 1,100 1 7.9 mi
Aqua Ohio Mansfield System #07
 766 0 8.1 mi
Shelby City
 9,453 1 8.1 mi
Waterfall Estates MHP
 51 2 8.2 mi
Aqua Ohio Mansfield System #10
 40 0 8.5 mi
Edgewood Estates
 96 0 8.5 mi
Heatherwood Community Water Assoc PWS
 177 0 8.6 mi
Arbors at Mifflin
 172 0 8.6 mi
All 47 community water systems in Richland County
Non-community systems in Richland County (71: schools, campgrounds, workplaces, restaurants)

These systems serve places you visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
Mansfield Fuel and Food
 840 0 0
Cornerstone Grace Brethren CH Mansfield
 75 0 0
Ohio Bird Sanctuary Lower Building
 45 0 0
Ohio Bird Sanctuary Upper Building
 45 0 0
Community Bible Church
 135 0 0
Springmill Drive-In Theatre
 61 1 1
Rumpke of Northern Ohio
 70 1 0
Walton Lake Crestline 1
 50 2 1
Walton Lake Crestline 3
 25 0 0
Milliron Auto Parts
 42 0 0
Journey Life Center Church & College
 285 0 0
Westbrook Country Club Hole # 12
 107 0 0
Clay Memorial Lutheran Church Mansfield
 30 2 0
Gorman Nature Center
 45 0 0
The Blueberry Patch
 45 1 1
Taylortown Community Church-Shelby
 70 0 0
GB Fabrication
 26 0 0
Bible Walk Museum
 35 0 0
Shelby Crossing Golf Course
 160 3 1
7-Eleven Store # 36177
 1,650 0 0
Werner-Gompf Funeral Services
 55 0 0
Sacred Heart School
 398 1 0
JR Properties of Mansfield SR 430
 125 0 0
McElroy Church of Christ Mansfield
 110 0 0
Lake Maria Campground
 125 0 0
Madison South Elementary
 675 0 0
Richland Rural Life Center Mansfield
 70 0 0
Mayflower Congregational CH Mansfield
 65 0 0
Impact Worship Center Mansfield
 335 0 0
Mansfield Inn Motel
 55 0 0
Snow Trails NO 2 House
 25 0 0
Snow Trails NO 3 Tubing PWS
 150 0 0
Little Washington Congregational Church
 115 0 0
Panchos Tacos Mexican Resturant
 110 0 0
Madison Community Youth Park
 150 2 1
Shelby Welded Tube
 82 0 0
Church of God Shelby
 175 0 0
Odot Rest Area 3-34 West
 300 0 0
Odot Rest Area 3-33 East
 275 0 0
Ohio Hilltop
 80 0 0
Heritage Inn Motel
 25 0 0
Oak Park Tavern
 60 0 0
Faith UM Church of Richland County
 100 0 0
Dollar General Store Greenwich #21824
 194 0 0
Rome Community Church-Shiloh
 40 0 0
Heart of Ohio Athletics
 125 0 0
Clear Fork High School
 1,178 0 0
Odnr Malabar Farm State Park Big House
 180 0 0
Odnr Malabar Farm Louis Bromfield
 45 0 0
Odnr Malabar Farms ST Park Horse Camp
 100 0 0
All non-community systems
About this data

Water systems are matched to Richland County, nearest to Ontario 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.

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 Ohio 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.