Professionals
Radon professionals in District of Columbia
Who tests and fixes radon in District of Columbia, what District of Columbia's own program says about licensing, and how to check a credential before you hire.
Updated October 2, 2026
Short answer
Radon professionals in District of Columbia, in brief
No business that District of Columbia itself licenses or certifies is listed on Radon411 yet. Ask Radon Test Kit Program what it requires before you hire.
The rule
Does District of Columbia license radon professionals?
District of Columbia'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.
District of Columbia 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 District of Columbia; District of Columbia's radon program is the place to ask who works there.
State program
District of Columbia's radon program
The state's own radon program: the place to ask who may work in the state.
Radon Test Kit Program
Its page covers free or discounted test kits.
Phone (202) 535-2302
Visit the program's page (opens in a new tab)Read September 25, 2026
The directory
Radon professionals listed for District of Columbia
No radon business is listed for District of Columbia yet. See professionals listed in neighboring states, or ask Radon Test Kit Program for its list. Run a radon business in District of Columbia? Ask to be listed.
Nearby
Listed professionals in states next to District of Columbia
A business licensed in a neighboring state is licensed there, not necessarily in District of Columbia. Check District of Columbia's rule above before you hire one.
Before you hire
How to check a credential in District of Columbia
District of Columbia's own list
Start with District of Columbia'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 District of Columbia
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 District of Columbia
- Does District of Columbia require radon professionals to be licensed?
District of Columbia'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.
District of Columbia 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 District of Columbia?
No business is listed for mitigation in District of Columbia 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 District of Columbia?
No business is listed for radon measurement in District of Columbia 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 District of Columbia offer free or discounted radon test kits?
Radon Test Kit Program's page, checked on September 25, 2026, says:
District residents can obtain a free radon test kit to reduce prolonged exposure to harmful levels of radon in the home.
- How current are the District of Columbia listings?
Radon411 reads no licensing list for District of Columbia; District of Columbia's radon program is the place to ask who works there.
- Is every business on this page licensed in District of Columbia?
No listing here is a license. The first list holds businesses District of Columbia's own registry lists, or that confirmed their own listing; each card names its source.
Before you hire, check the business against District of Columbia'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 District of Columbia? Claim your listing.
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