Clinton County · OH

Wilmington, OH

City of Wilmington Water Department does not publish a hardness figure for Wilmington. So rather than repeat a number nobody has measured, we test the water at your property before recommending anything. Lime softened.

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Local water profile

City of Wilmington Water Department does not publish a hardness figure, so we test on site.

Wilmington neighborhoods we serve

Downtown Wilmington
Airborne Road area

Water profile

How hard is the water in Wilmington?

City of Wilmington Water Department does not publish a finished-water hardness figure, so we test on site rather than quote a number nobody has measured.

Hardness: Not published by the utility
Utility: City of Wilmington Water Department
Source: Surface water
Treatment: Lime softened.
Worth knowing: Wilmington does not report a finished hardness figure, so we test on site. Rural properties outside the city run on private wells, which are a different treatment problem entirely.
PFAS: Federal sampling found PFOS at 8.79 ppt, above the federal limit that takes effect in 2029, which EPA has proposed letting systems request until 2031 to meet. Reverse osmosis is the treatment that removes it.

Source: City of Wilmington, 2025 reporting year. Hardness bands follow the Water Quality Association scale: soft under 3.5 grains, moderate 3.5 to 7, hard 7 to 10.5, very hard above 10.5.

Common questions

How hard is the water in Wilmington, OH?

City of Wilmington Water Department does not publish a finished-water hardness figure for Wilmington, OH. The supply is surface water. Lime softened.

Who supplies the water in Wilmington, OH?

Wilmington is served by City of Wilmington Water Department. The water comes from surface water. Lime softened.

Do I need a water softener in Wilmington, OH?

Because City of Wilmington Water Department does not publish a hardness figure for Wilmington, the only way to answer this properly is to test the water at the property.

What parts of Wilmington do you cover?

All of Wilmington, including Downtown Wilmington and Airborne Road area. Flat-rate pricing across the whole service area, with no travel charge between neighborhoods.

Is anything unusual about Wilmington water?

Wilmington does not report a finished hardness figure, so we test on site. Rural properties outside the city run on private wells, which are a different treatment problem entirely.

Is there PFAS in Wilmington, OH water?

Federal sampling found PFOS at 8.79 ppt, above the federal limit that takes effect in 2029, which EPA has proposed letting systems request until 2031 to meet. Reverse osmosis at the kitchen tap is the treatment that removes PFAS.

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Local coverage

Wilmington, OH: ZIP Codes We Serve

We install and service water treatment systems across 45177.

Wilmington, OH: Local Landmarks

Homes near J. W. Denver Williams Memorial Park, Galvin Park, Clinton County Fairground, David R. Williams Memorial Park, Sheppard Arthur Watson Library and Wilmington Public Library of Clinton County all draw the same municipal supply.

Wilmington, OH: Nearby Streets

Our crews work West Main Street, West Truesdell Street, Xenia Avenue, East Main Street, Locust Street, North South Street, South South Street and Rombach Avenue regularly.

Wilmington, OH in the Greater Cincinnati area

Wilmington sits in Clinton County, part of the Greater Cincinnati area. Water here is supplied and treated at the county and municipal level, so hardness and treatment vary street to street across the region rather than following one regional average. That is why we test at the property before recommending a system. See every community we serve in Clinton County.

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