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RADON411

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

Radon professionals listed for Colorado

None that Colorado licenses yet. The businesses below have an address here and another state licenses them.

No business licensed by Colorado is listed here yet.

Located in Colorado, licensed by another state

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

2 professionals located in Colorado and listed by another state.

By city

2 cities in Colorado with a listed business address.

Every radon business listed in Colorado, A to Z (2)

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.

2 businesses with an address in Colorado appear in a separate list because another state's registry lists them. That does not mean Colorado licenses them.

The rule

Does Colorado license radon professionals?

Yes. Colorado's radon program page, checked on October 3, 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.
Colorado Department of Public Health and Environment, read October 3, 2026

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.

The Colorado Department of Regulatory Agencies, Office of Radon Professionals publishes its list of licensed radon professionals, last read on October 4, 2026. It names individual people, not businesses, and Radon411 lists businesses only, so no one on it is listed here. To check a person's license, use the state's own list.

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 October 3, 2026

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

  1. Colorado's own list

    Start with the Colorado Department of Regulatory Agencies, Office of Radon Professionals. Licensing is done by the state, so its list or search says who may legally work in Colorado.

  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 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.

What a professional test involves

A mitigation contractor

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 Colorado

Does Colorado require radon professionals to be licensed?

Yes. Colorado's radon program page, checked on October 3, 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.

How to choose a mitigation contractor

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.

What a professional radon test involves

Does Colorado offer free or discounted radon test kits?

Colorado Department of Public Health and Environment's page, checked on October 3, 2026, says:

Order a discounted radon test kit

Free and discounted test kits by state

Does Colorado have a radon disclosure rule for home sales?

Colorado Department of Public Health and Environment's page, checked on October 3, 2026, says:

As of August 7, 2023, landlords in Colorado are required to disclose radon information when a tenant signs a lease agreement.

Every state's program, licensing and disclosure rule

How current are the Colorado listings?

The Colorado Department of Regulatory Agencies, Office of Radon Professionals publishes its list of licensed radon professionals, last read on October 4, 2026. It names individual people, not businesses, and Radon411 lists businesses only, so no one on it is listed here. To check a person's license, use the state's own list.

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.

2 businesses with an address in Colorado appear in a separate list because another state's registry lists them. That does not mean Colorado licenses them.

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

Next steps

Where to go next