Radon professionals in Montana
Who tests and fixes radon in Montana, what Montana's own program says about licensing, and how to check a credential before you hire.
Updated October 2, 2026
Montana at a glance
Share at 4+ pCi/L
45.5%
9.8 pts above U.S.
- Montana
- 45.5%
- U.S.
- 35.7%
9,893 tests across 51 counties, 2008 to 2017
Counties in EPA Zone 1
49 of 56
Most at highest potential
- Zone 1
- 49
- Zone 2
- 7
EPA's predicted potential; Zone 1 is the highest
Counties with figures
51
Of 56 counties
- With figures
- 51
- All
- 56
Reported tests on file, 2008 to 2017
Radon professionals listed for Montana
No radon business is listed for Montana yet. Search nearby states
Short answer
Radon professionals in Montana, in brief
No business that Montana itself licenses or certifies is listed on Radon411 yet. Montana's radon program says the state does not license or certify radon professionals.
Radon levels
Read a radon result for Montana
Before you call a professional: what EPA says about a test result, beside Montana's own share of high tests.
Read a result for Montana
Starts at EPA's action level
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 4.0 pCi/L
At or above 4 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is at or above 4 pCi/L. EPA recommends fixing a home when the radon level is 4 pCi/L or higher. 45.5% of Montana's reported tests reached 4 pCi/L, 2008 to 2017.
The rule
Does Montana license radon professionals?
The rule
Does Montana license radon professionals?
No. Montana's radon program page, checked on November 3, 2026, says:
Montana DEQ does not certify or require proof of certification for the contractors listed.
Montana is not on the list of states with radon credentialing programs that EPA's state contacts page publishes. 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.
State program
Montana's radon program
The state's own radon program: the place to ask who may work in the state.
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 November 3, 2026
Nearby
Listed professionals in states next to Montana
A business licensed in a neighboring state is licensed there, not necessarily in Montana. Check Montana's rule above before you hire one.
Before you hire
How to check a credential in Montana
Before you hire
How to check a credential in Montana
Montana's rule
Montana's radon program says the state does not license radon professionals, so ask for a national certification instead, and check it in the next two steps.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.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.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 Montana
Hiring
Hiring in Montana
A tester
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.
A mitigation contractor
Get more than one estimate, contact references, and ask for a written proposal and a contract before any work starts.
Questions
Common questions about Montana
- Does Montana require radon professionals to be licensed?
No. Montana's radon program page, checked on November 3, 2026, says.
Montana is not on the list of states with radon credentialing programs that EPA's state contacts page publishes.
Montana DEQ does not certify or require proof of certification for the contractors listed.
- How do I find a certified radon mitigator in Montana?
No business is listed for mitigation in Montana on Radon411 yet.
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.
- Who tests for radon in Montana?
No business is listed for radon measurement in Montana on Radon411 yet.
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.
- Does Montana offer free or discounted radon test kits?
Radon Control Program's page, checked on November 3, 2026, says:
Energy Bureau staff manage the radon information toll-free hotline and distribute subsidized radon test kits to Montana residents.
- Is every business on this page licensed in Montana?
No listing here is a license. The first list holds businesses Montana's own registry lists, or that confirmed their own listing; each card names its source.
Before you hire, check the business against Montana's own list or the issuing body's search, because a listing on Radon411 is not a credential.
How listings are verified. Run a radon business in Montana? Get Featured.
Next steps