Find a state-certified radon tester or mitigation contractor
Radon is an invisible, odorless gas that seeps up from the ground, and the only way to know your level is to test. Find certified pros near you, sourced from official state certification lists, plus what results mean and what fixing it typically costs.
Data from state radon certification lists
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Radon guides
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How it works
Test your home
A $20 to $30 kit or a certified tester tells you your level. Our guide shows how.
Understand your number
4 pCi/L or higher? The EPA recommends fixing it. Between 2 and 4, consider it.
Hire a certified pro
Every company here came from the state's official certification list.
Get free quotes from up to 3 certified radon pros near your area
Tell us what you need and where. We send your request to up to 3 state-certified pros near you who offer that service, and they contact you directly.
What happens next
- We match your ZIP to certified pros nearby who offer the service you picked.
- Each pro gets your request and contacts you directly, usually within a business day.
- Compare quotes and pick one, or none. There's no fee and no obligation.
Free, no obligation. We don't sell your details to anyone else.
Prefer to choose yourself? Every certified pro is listed above with their phone number.
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Common questions
What is radon?
A radioactive gas that forms naturally when uranium in soil and rock breaks down. It enters homes through cracks and gaps in the foundation and can build up indoors.
Why does radon matter?
The US EPA identifies radon as the leading cause of lung cancer among people who don't smoke and the second leading cause overall.
What level is too high?
The EPA recommends fixing your home at 4 pCi/L or higher and considering a fix between 2 and 4 pCi/L.
Do I need a certified contractor?
Some states, including Pennsylvania, require radon testers and mitigators to be state-certified. Elsewhere, look for national certification. Either way, ask for proof.