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Radon professionals in Ohio

Who tests and fixes radon in Ohio, what Ohio's own program says about licensing, and how to check a credential before you hire.

Updated October 2, 2026

Radon professionals listed for Ohio

480 professionals in Ohio. Showing 1 to 1224.

On this page: 1 testing and mitigation, 6 mitigation, 517 testing

Testing and mitigation 1

Mitigation 6

Testing 517

Show 12 more on this page

Located in Ohio, licensed by another state

These businesses have an address in Ohio, and another state's registry lists them. That does not mean Ohio licenses them: check with Ohio's radon program before hiring one for work here.

1 professional located in Ohio and listed by another state.

By city

The 12 of 228 Ohio cities with the most listings. Search for any other, or open the full list.

All 228 cities in Ohio
Every radon business listed in Ohio, A to Z (445)

Short answer

Radon professionals in Ohio, in brief

Radon411 lists 480 radon businesses for Ohio: 349 listed for radon measurement (testing), 154 for mitigation, 23 of them for both and 2 laboratories. Ohio's radon program says the state licenses or certifies radon professionals.

Listed
480
Businesses on Ohio's list here
Testing
349
Listed for radon measurement
Mitigation
154
Listed for mitigation
Laboratories
2
Listed laboratories

The rule

Does Ohio license radon professionals?

Yes. Ohio's radon program page, checked on October 3, 2026, says:

This program licenses companies and persons directly involved with the radon testing and mitigation industry.
Radon Education and Licensing Program, read October 3, 2026

EPA's state contacts page lists Ohio among the states with radon credentialing programs. Licensing is done by the state, not by the national programs, and EPA requires states that receive radon grants to give the public a list of only those providers credentialed by the state or by NRPP or NRSB.

Listings for Ohio come from the list of licensed radon professionals that the Ohio Department of Health, Radon Education and Licensing Program publishes, last read on October 4, 2026, and from businesses that confirm their own details through Radon411's claim process.

State program

Ohio's radon program

The state's own radon program: the place to ask who may work in the state.

Radon Education and Licensing Program

Ohio Department of Health

Its page covers free or discounted test kits and who may test and fix radon in the state.

Phone 614-728-0272 · Email indoor.radon@odh.ohio.gov

Visit the program's page (opens in a new tab)Read October 3, 2026

Nearby

Listed professionals in states next to Ohio

A business licensed in a neighboring state is licensed there, not necessarily in Ohio. Check Ohio's rule above before you hire one.

Before you hire

How to check a credential in Ohio

  1. Ohio's own list

    Start with the Ohio Department of Health, Radon Education and Licensing Program. Licensing is done by the state, so its list or search says who may legally work in Ohio.

  2. NRPP's search

    The National Radon Proficiency Program's search finds its Certified Mitigation Specialists and Certified Measurement Professionals by area, by name, or by the 6-digit NRPP ID number a professional can give you.

  3. NRSB's search

    The National Radon Safety Board's search finds a professional in your area, or confirms that a named professional is NRSB certified.

  4. The ID card

    The programs usually issue a photo ID card showing the holder's qualifications and its expiry date. Ask to see it, and if in doubt, check with the body that issued it.

Hiring

Hiring in Ohio

A tester

349 businesses are listed for testing here. Ask for the credential and ID card, how the test will be guarded against interference, and when the report will come. EPA recommends an independent, qualified tester for the test after a system is installed.

What a professional test involves

A mitigation contractor

154 businesses are listed for mitigation here. Get more than one estimate, contact references, and ask for a written proposal and a contract before any work starts.

How to choose a contractor

Questions

Common questions about Ohio

Does Ohio require radon professionals to be licensed?

Yes. Ohio's radon program page, checked on October 3, 2026, says.

EPA's state contacts page lists Ohio among the states with radon credentialing programs.

This program licenses companies and persons directly involved with the radon testing and mitigation industry.
How do I find a certified radon mitigator in Ohio?

Radon411 lists 154 businesses for mitigation in Ohio, each with the source that lists it.

Your state radon program can help you find qualified professionals in the state, and NRPP and NRSB, the two national proficiency programs EPA names, each publish a search of the professionals they certify.

Mitigation listings for OhioHow to choose a mitigation contractor

Who tests for radon in Ohio?

Radon411 lists 349 businesses for radon measurement in Ohio.

A qualified radon tester is very often a home inspector, and your state radon office can give you its approved list of radon testing companies.

Testing listings for OhioWhat a professional radon test involves

Does Ohio offer free or discounted radon test kits?

Radon Education and Licensing Program's page, checked on October 3, 2026, says:

Free radon test kits are available for Ohio homeowners.

Free and discounted test kits by state

How current are the Ohio listings?

Listings for Ohio come from the list of licensed radon professionals that the Ohio Department of Health, Radon Education and Licensing Program publishes, last read on October 4, 2026, and from businesses that confirm their own details through Radon411's claim process.

Is every business on this page licensed in Ohio?

No listing here is a license. The first list holds businesses Ohio's own registry lists, or that confirmed their own listing; each card names its source.

1 business with an address in Ohio appears in a separate list because another state's registry lists it. That does not mean Ohio licenses it.

How listings are verified. Run a radon business in Ohio? Get Featured.

Next steps

Where to go next