Professionals
Radon professionals in Colorado
Who tests and fixes radon in Colorado, what Colorado's own program says about licensing, and how to check a credential before you hire.
Updated October 2, 2026
Short answer
Radon professionals in Colorado, in brief
No business that Colorado itself licenses or certifies is listed on Radon411 yet. Colorado's radon program says the state licenses or certifies radon professionals.
The rule
Does Colorado license radon professionals?
Yes. Colorado's radon program page, checked on September 25, 2026, says:
Listed contractors are certified by the National Radon Proficiency Program or the National Radon Safety Board, and must be licensed by the Colorado Department of Regulatory Agencies.
EPA's state contacts page lists Colorado 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.
Radon411 reads no licensing list for Colorado; Colorado's radon program is the place to ask who works there.
State program
Colorado's radon program
The state's own radon program: the place to ask who may work in the state.
Colorado Department of Public Health and Environment
Its page covers free or discounted test kits, who may test and fix radon in the state and the disclosure rule for home sales.
Visit the program's page (opens in a new tab)Read September 25, 2026
The directory
Radon professionals listed for Colorado
No radon business is listed for Colorado yet. See professionals listed in neighboring states, or ask Colorado Department of Public Health and Environment for its list. Run a radon business in Colorado? Ask to be listed.
Nearby
Listed professionals in states next to Colorado
A business licensed in a neighboring state is licensed there, not necessarily in Colorado. Check Colorado's rule above before you hire one.
Before you hire
How to check a credential in Colorado
Colorado's own list
Start with Colorado's radon program. Licensing is done by the state, and most states can give you a list of radon service providers working there.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 Colorado
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 Colorado
- Does Colorado require radon professionals to be licensed?
Yes. Colorado's radon program page, checked on September 25, 2026, says.
EPA's state contacts page lists Colorado among the states with radon credentialing programs.
Listed contractors are certified by the National Radon Proficiency Program or the National Radon Safety Board, and must be licensed by the Colorado Department of Regulatory Agencies.
- How do I find a certified radon mitigator in Colorado?
No business is listed for mitigation in Colorado 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 Colorado?
No business is listed for radon measurement in Colorado 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 Colorado offer free or discounted radon test kits?
Colorado Department of Public Health and Environment's page, checked on September 25, 2026, says:
Order a free radon test kit
- Does Colorado have a radon disclosure rule for home sales?
Colorado Department of Public Health and Environment's page, checked on September 25, 2026, says:
As of August 7, 2023, landlords in Colorado are required to disclose radon information when a tenant signs a lease agreement.
- How current are the Colorado listings?
Radon411 reads no licensing list for Colorado; Colorado's radon program is the place to ask who works there.
- Is every business on this page licensed in Colorado?
No listing here is a license. The first list holds businesses Colorado's own registry lists, or that confirmed their own listing; each card names its source.
Before you hire, check the business against Colorado's own list or the issuing body's search, because a listing on Radon411 is not a credential.
No business pays to be listed, labelled or placed higher here, and Radon411 sells no leads. How listings are verified. Run a radon business in Colorado? Claim your listing.
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