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Certified radon testers and mitigators in Ohio

51 certified radon testers and mitigation contractors in Ohio, from the state's official list or the national NRPP directory.

5 cities & counties51 certified pros

Pros in this state come from the NRPP national certification directory (checked Oct 28, 2026). Get Radon Quotes is independent and not affiliated with NRPP. Some states also require a state license, so confirm with your state radon office before you hire. Your state radon office.

Major cities

Cincinnati 8Columbus 6

Counties in Ohio A–Z

Smaller counties in Ohio

Counties with only a few listings so far, grouped by county.

Butler County 1

Clermont County 1

Clinton County 1

Cuyahoga County 2

Delaware County 2

Fairfield County 1

Greene County 2

Lake County 1

Lawrence County 1

Licking County 1

Lorain County 1

Lucas County 1

Perry County 1

Portage County 1

Stark County 2

Summit County 2

Washington County 2

Wayne County 2

Wood County 1

Get free quotes from up to 3 certified radon pros near Ohio

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What happens next

  1. We match your ZIP to certified pros nearby who offer the service you picked.
  2. Each pro gets your request and contacts you directly, usually within a business day.
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Prefer to choose yourself? Every certified pro is listed above with their phone number.