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Is Ontario, OH tap water safe?

4 utilities serve Ontario, by EPA’s records. Here is what EPA’s and Ohio’s records show for each, against the legal limits and the stricter health goals.

Matched to your utility using EPA records.

The short answer

1 of the 4 utilities serving Ontario has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Ohio’s records: Mansfield City.

Mansfield City, which serves the most people here, has nothing above a health goal in EPA’s and Ohio’s records. That data covers what its report lists, not everything.

A town can be served by more than one utility, and some homes are on private wells. The name on your water bill tells you which is yours, and your ZIP code narrows it down. They are listed by how many people each serves in Ontario’s ZIP codes, from EPA’s estimates.

Water testing near Ontario

A utility tests the water it sends out. A test of your own tap shows what your pipes add, and on a private well it is the only test there is. It takes a lab Ohio certifies.

The 3 labs Ohio certifies closest to Ontario, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Eurofins DW and WW Central - Marion

    Marion, OH · about 33 miles

    Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts

    (740) 389-5991

  • Eastern Lab Services, Ltd.

    Medina, OH · about 34 miles

    Certified for bacteria

    (330) 670-7920

  • Edenridge Laboratory, Ltd.

    Millersburg, OH · about 39 miles

    Certified for bacteria

    (330) 893-2933

All 76 certified labs for Ohio

ZIP codes in Ontario

Which ZIP codes are in Ontario: Census 2020 relationship files. Which utilities serve them, and how many people: EPA SDWIS and EPA’s service area map. Each utility’s results: EPA UCMR 5, EPA SDWIS, and EPA’s and the state’s compliance monitoring, as its report lists them. How they are measured: methodology. Certified labs: Ohio EPA, laboratories certified/accepted to perform analyses on public drinking water; distances from the Census 2020 ZIP code tabulation area gazetteer.

Near Ontario

Other towns in Richland County with a page of their own.

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