Ohio · population 6,648
Lead pipes in Ontario, OH
1 lead or galvanized lines to replace
Most of Ontario (population 6,648) gets its water from Ontario City. That system reported 0 lead and 1 galvanized-requiring-replacement service lines out of 2,992, with 126 more of unknown material.
<0.1% of Ontario City's service lines are lead or galvanized requiring replacement, lower than the Ohio average (8.8%) and lower than the national average (3.1%).
- Lead 0%
- Galvanized (replace) <0.1%
- Unknown 4.2%
- Non-lead 96%
Latest lead test for Ontario City (Jan 2023–Dec 2025): 2.7 ppb at the 90th percentile, against a 15 ppb federal action level. Full test history.
Compliance record: EPA lists no Lead and Copper Rule violations since 2015 for Ontario City.
Water systems serving Ontario
| Water system | Lead | Galv. | Unknown | % lead |
|---|---|---|---|---|
| Ontario CityMain system | 0 | 1 | 126 | <0.1% |
| Mansfield CityServes nearby areas | 0 | 0 | 12,676 | 0% |
Matched from EPA water system service area boundaries and the cities each system reports serving. Edges of the city may be served by a neighboring system; your water bill names your utility.
Check your address in Ontario
The counts above cover the whole water system. To see whether your line is lead, look up your address on Ontario City's official inventory. Utilities had to make these public by October 16, 2024.
No map yet? Do the 2-minute scratch and magnet test.
Protect your drinking water
If your line is lead, galvanized or unknown, use a filter certified to NSF/ANSI 53 for lead for drinking, cooking and baby formula, and use only cold water.
Choosing a lead-certified filter · Testing your water · Replacement cost
Nearby cities
- Crestline104 lead + galv. lines
- Galion118 lead + galv. lines
- Plymouth7 lead + galv. lines
- Ashland125 lead + galv. lines
- Mount Gilead33 lead + galv. lines
- Willard162 lead + galv. lines
- Cardington316 unknown
- New Londonno lead reported
Check another water system
Questions
Does Ontario, OH have lead pipes?
Yes. Ontario City, which serves Ontario, reported 0 lead and 1 galvanized-requiring-replacement service lines, plus 126 of unknown material.
Who supplies water to Ontario?
EPA's service area maps place most of Ontario in Ontario City's service area (PWSID OH7003512). Mansfield City also serves parts of the city or nearby areas.
How do I check whether my Ontario home has a lead service line?
Search your address on Ontario City's service line inventory map. You can also scratch the pipe where water enters your home: lead is soft, dull gray, scratches to shiny silver and doesn't attract a magnet.
When will lead pipes in Ontario be replaced?
EPA's Lead and Copper Rule Improvements require most systems to replace lead and galvanized-requiring-replacement lines by December 31, 2037. Ask Ontario City whether your street is scheduled and whether it covers the private side.