ProfessionalsBusiness profile
Gill Group
Dexter, Montana. Testing
1 Ohio state license verified against the Ohio Department of Health, Radon Education and Licensing Program list, last checked October 4, 2026.
Credentials
Licenses and certifications
1 credential is on file for this business, exactly as the issuer's list printed it.
These are Ohio licenses, and the business address is in Montana.
Radon411 has no Montana record for this business. Before hiring it for a home in Montana, check what Montana asks for. What Montana requires
Ohio state license (1)
Issued by the Ohio Department of Health, Radon Education and Licensing Program, not by NRPP or NRSB. Radon411 last checked the list on October 4, 2026.
| License | Number | Status on the list | Expires | Verified | Check with the issuer |
|---|---|---|---|---|---|
| Testing license | No. RT2157 | Ohio licensed radon tester | Expires April 30, 2028 | Verified October 4, 2026 | Verify RT2157 with the Ohio Department of Health, Radon Education and Licensing Program (opens in a new tab) |
Licensing in Montana
Montana's radon program says the state does not license or certify radon professionals.
Montana DEQ does not certify or require proof of certification for the contractors listed.
Radon Control Program
Montana DEQ
Its page covers free or discounted test kits and who may test and fix radon in the state.
Phone 1-800-546-0483
Visit the program's page (opens in a new tab)Read October 3, 2026
Nearby
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