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Radon professionals in Missouri

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

Updated October 2, 2026

Short answer

Radon professionals in Missouri, in brief

No business that Missouri itself licenses or certifies is listed on Radon411 yet. Ask Missouri Radon Program what it requires before you hire.

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

The rule

Does Missouri license radon professionals?

Missouri's radon program page, checked on September 25, 2026, does not say whether the state licenses or certifies radon professionals. Ask the program before you hire.

Missouri 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.

Radon411 reads no licensing list for Missouri; Missouri's radon program is the place to ask who works there.

State program

Missouri's radon program

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

Missouri Radon Program

Missouri Department of Health and Senior Services

Its page covers free or discounted test kits.

Phone 573-751-6102 · Email radon@health.mo.gov

Visit the program's page (opens in a new tab)Read September 25, 2026

The directory

Radon professionals listed for Missouri

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

By city

4 cities in Missouri with a listed business address.

No business licensed by Missouri is listed here yet. Where Missouri licenses radon professionals, its own list is the complete one.

Located in Missouri, licensed by another state

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

6 professionals located in Missouri and listed by another state.

On this page: 1 testing and mitigation, 1 mitigation, 4 testing

Testing and mitigation (1)

Mitigation (1)

Testing (4)

Nearby

Listed professionals in states next to Missouri

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

Before you hire

How to check a credential in Missouri

  1. Missouri's own list

    Start with Missouri's radon program. Licensing is done by the state, and most states can give you a list of radon service providers working there.

  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 Missouri

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 Missouri

Does Missouri require radon professionals to be licensed?

Missouri's radon program page, checked on September 25, 2026, does not say whether the state licenses or certifies radon professionals. Ask the program before you hire.

Missouri is not on the list of states with radon credentialing programs that EPA's state contacts page publishes.

How do I find a certified radon mitigator in Missouri?

No business is listed for mitigation in Missouri 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 Missouri?

No business is listed for radon measurement in Missouri 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 Missouri offer free or discounted radon test kits?

Missouri Radon Program's page, checked on September 25, 2026, says:

Free radon test kits are available for Missouri residents (limit one per household).

Free and discounted test kits by state

How current are the Missouri listings?

Radon411 reads no licensing list for Missouri; Missouri's radon program is the place to ask who works there.

Is every business on this page licensed in Missouri?

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

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

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 Missouri? Claim your listing.

Next steps

Where to go next