Radon professionals near you: how to find one, and how to check them
The useful answer to “radon mitigation near me” is not a list of nearby businesses. It is that radon credentials are set at state level — and in three of the ten states here, not set by the state at all. Which of those you are in changes what “certified” means in a quote and what you should be checking. Here is who credentials radon work in each state we publish for, how to verify a number in about two minutes, and what to ask before you compare prices.
Who credentials radon work, state by state
The regimes genuinely differ, and the difference changes what the word “certified” means in a quote. Seven of these ten states run a state credential, several licensing measurement and mitigation separately so that holding one does not authorise the other. The other three — Wisconsin, Michigan and Colorado — do not credential radon work at state level and point homeowners toward the national proficiency programmes instead, so the question there is which certification a bidder holds rather than which licence. Each row links to that state’s resource centre, which names the agency to ask and what it is authoritative for.
| State | Who answers a credential question | The regime |
|---|---|---|
| IllinoisIL | Illinois Emergency Management Agency and Office of Homeland Security (IEMA-OHS), Radon Program | Illinois licenses radon measurement and mitigation professionals through IEMA-OHS under the Radon Industry Licensing Act. The licence is statewide, so a licensed contractor based in the Rock River Valley may work in the collar counties or downstate — the county line is irrelevant to who may quote your home. Measurement and mitigation are separate licences; holding one does not authorise the other.Ask for the IEMA-OHS licence number as it appears on the contract, not a claim of being licensed. |
| IowaIA | Iowa state health department radon programme | Iowa certifies radon measurement and mitigation specialists through the state health department. The credential is Iowa-specific and is what should be verified before hiring — a general contractor licence is not a radon credential, and measurement and mitigation are certified separately.Ask for the Iowa certification number as written on the contract. |
| NebraskaNE | Nebraska Department of Health and Human Services radon programme | Nebraska regulates radon professionals through its state health and human services department, which credentials radon measurement and mitigation businesses working in Nebraska homes. That credential is separate from Iowa certification just across the river, which matters in the Omaha and Council Bluffs metro where contractors routinely work both sides.Ask for the Nebraska credential and confirm it is current. |
| MinnesotaMN | Minnesota Department of Health (MDH) Indoor Air Unit | Minnesota licenses radon measurement and mitigation professionals through the Minnesota Department of Health. This is a genuine state licence rather than a voluntary credential, and it is what should be verified before hiring. Measurement and mitigation are licensed separately.Ask for the MDH licence number as it appears on the contract. |
| WisconsinWI | Wisconsin Department of Health Services radon programme | Wisconsin does not license radon professionals at state level. The state health department directs homeowners toward professionals credentialed through the national radon proficiency programmes — NRPP or NRSB. In an unlicensed state, that national certification is the credential, not a supplement to one.Ask which national certification the contractor holds, and in which category. |
| MichiganMI | Michigan state radon programme (Department of Environment, Great Lakes, and Energy) | Michigan does not license radon professionals at the state level. The state radon programme directs homeowners toward professionals credentialed through NRPP or NRSB. Ask which certification a bidder holds, confirm it is current, and apply the same scrutiny to the written design and warranty.Ask which national certification the contractor holds, and confirm it directly with the programme. |
| OhioOH | Ohio Department of Health (ODH) Radon Program | Ohio licenses radon testers, radon mitigation contractors, and radon laboratories through the Ohio Department of Health. This is a genuine state licence rather than a voluntary credential — anyone performing radon mitigation for compensation in Ohio must hold it. Testing and mitigation are licensed separately.Ask for the ODH licence number as it appears on the contract. |
| PennsylvaniaPA | Pennsylvania Department of Environmental Protection (DEP) Radon Division | Pennsylvania requires radon testing, mitigation, and laboratory services to be performed by DEP-certified professionals. Ask any bidder for their DEP certification number and confirm it is current and covers mitigation. Testing and mitigation are certified separately.Ask for the DEP certification number as written on the contract. |
| ColoradoCO | Colorado Department of Public Health and Environment radon programme | Colorado does not license radon professionals at the state level. The state radon programme directs homeowners toward professionals credentialed through NRPP or NRSB. Ask which certification a bidder holds, confirm it is current, and apply the same scrutiny to the written design, the warranty terms, and whether a post-mitigation verification test is included.Ask which national certification the contractor holds, and verify it directly with the programme. |
| KentuckyKY | Kentucky Department for Public Health radon programme | Kentucky licenses radon measurement and radon mitigation professionals through the state Department for Public Health. Ask for the licence number, confirm it is current, and confirm it covers mitigation rather than measurement alone.Ask for the Kentucky licence number as it appears on the contract. |
Five questions, in the order that saves money
- Ask which credential they hold, and for the number. A contractor who answers "we do radon" without naming a credential has answered a different question. In a state that licenses this work, the number is the licence; in a state that does not, it is a national certification and the issuing body matters.
- Confirm it covers the work being quoted. Measurement and mitigation are separate credentials in the states that license both. Holding one does not authorise the other, and a quote for mitigation carrying a measurement number is quoting work the holder is not credentialed for.
- Verify the number with the issuing body, not the contractor’s website. A website is the one source with an interest in the answer. The agency listing is the only place a licence can be confirmed current rather than merely claimed.
- Ask who performs the post-work verification test. EPA advises retesting after mitigation to confirm the system reduced the level. A quote that does not name who tests, when, and with what is a quote for an installation rather than for a result.
- Get the scope in writing before comparing prices. Suction-point count and locations, routing, fan model and placement, sealing scope, electrical responsibility, warranty terms and the verification test. Two numbers are only comparable once both name the same work.
Where we publish local guidance
We are not a contractor and we do not hold any of the credentials above — we publish decision resources and, where a market has an active provider, route requests to independent licensed businesses. These are the metros we write about in detail; each hub covers how results vary locally, what the housing stock does to them, and what the state requires of a seller.
Colorado: Denver Metro · Colorado Springs & the Pikes Peak Region · Fort Collins & Northern Colorado
Illinois: Suburban Chicagoland · Rockford & the Rock River Valley · Peoria & the Illinois River Valley · Springfield & the Capital Region · Bloomington-Normal · Champaign-Urbana · Decatur & Macon County · Quad Cities (Illinois) · Kankakee County · DeKalb County
Iowa: Des Moines Metro · Cedar Rapids Metro · Davenport & the Iowa Quad Cities · Dubuque · Iowa City & Johnson County · Waterloo-Cedar Falls · Mason City & North Iowa · Fort Dodge & Webster County · Sioux City & Siouxland · Council Bluffs & Pottawattamie County · Ames & Story County
Kentucky: Lexington & the Bluegrass
Michigan: Grand Rapids & West Michigan
Minnesota: Minneapolis–St. Paul
Nebraska: Omaha Metro · Lincoln & Lancaster County
Ohio: Columbus Metro · Cincinnati Metro · Dayton Metro
Pennsylvania: Pittsburgh Metro · Harrisburg & the Susquehanna Valley
Wisconsin: Madison & Dane County
If you have not tested yet
Hiring order matters here, and it is the opposite of what most people do. Measurement comes first and it is a different job from mitigation, often performed by separately credentialed people — testing versus mitigation sets out where one ends and the other begins. If you have a number already and want to know what it actually supports, start with what radon levels mean. If the reading turned up inside a property sale, radon in an Illinois home sale covers the clock, and what Illinois law requires and what it does not separates the statutory duties from the recommendations they get confused with.
Radon Connect is a free referral service. It does not perform radon testing, inspection, or mitigation, does not subcontract work, and does not take a percentage of any contract. Every quote, contract, and warranty is between the homeowner and the independent business they choose.
Questions about finding a radon professional
Does a radon contractor have to be local to work on my house?
No. In the seven states covered here that run a state credential, it is valid statewide — there is no county or municipal radon credential, and a credentialed business may work anywhere in that state. In the three that do not credential radon work at state level, there is no state authorisation to be local to in the first place, and the national certification a bidder holds is what to ask about. Distance affects scheduling and travel charges either way.
What does “certified” mean if my state does not license radon work?
It means a national certification rather than a state licence, and the issuing body is the thing to ask about. Not every state licenses this work; where a state does not, the state health department typically points homeowners toward nationally certified professionals instead. Your state’s resource centre names which applies.
Is the person who tests my house the same person who fixes it?
Not necessarily, and in states that license both they are separate credentials — holding one does not authorise the other. It is worth asking directly, because a business that both measures and mitigates has an obvious interest in the measurement, and some homeowners prefer those done by different parties.
Does Radon Connect send someone out?
No. We do not test, inspect, or install anything, and we hold none of these credentials. Where a market has an active provider we route a request to independent licensed businesses; no market has one at present, so today a request is recorded and the confirmation says so rather than implying otherwise.
How do I actually verify a licence number?
Take it to the issuing agency rather than the contractor’s own website — your state’s resource centre names the body. Confirm the number is current, and confirm the category covers the work being quoted rather than only the other half of the job.
Not sure where to start?
Tell us the situation and the ZIP. The form checks coverage before it asks for contact details, and the confirmation tells you exactly what happened to the request.
Sources
- U.S. EPA — Radon
- U.S. EPA — Consumer’s Guide to Radon Reduction
- U.S. EPA — A Citizen’s Guide to Radon
- IEMA-OHS — Illinois Emergency Management Agency and Office of Homeland Security — Radon Program