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Radon testing in Connecticut

43 radon testers in 33 cities. Find your city, then call to book a test.

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West Hartford

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Stamford

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Clinton

Greenwich

Marlborough

Wolcott

Woodbridge

Andover

Beacon Falls

Berlin

Bridgeport

Colchester

Cromwell

Darien

Deep River

Derby

Easton

Essex

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Guilford

Hamden

Madison

Milford

Naugatuck

New Milford

North Haven

Oakdale

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Sandy Hook

Seymour

South Windsor

Terryville

Woodbury

Questions about radon testing

How many radon testers are in Connecticut?

radon.directory lists 43 radon testers in Connecticut in 33 cities. Each one says on its own website that it tests for radon and has an open Google Business Profile, checked in October 2026.

What kinds of businesses test for radon in Connecticut?

Of the 43 businesses listed: 25 home inspectors; 11 radon companies that test and fix radon; 7 other businesses that test for radon. Radon specialists often also fix high levels; home inspectors usually test during a home sale.

How do I choose a radon tester?

The EPA suggests your state radon program as the place to find qualified professionals, and says states list only providers credentialed by a state license or by one of the two national programs, the National Radon Proficiency Program (NRPP) or the National Radon Safety Board (NRSB). Ask a tester which credential they hold. Source.

What radon level needs fixing?

The EPA says to fix your home if the radon level is 4 pCi/L or more, and to consider fixing it between 2 and 4 pCi/L. Source.

Should I get a short-term or long-term radon test?

A short-term test takes a few days and is a quick way to screen a home. A long-term test runs at least 91 days and shows your average level over the year. A high short-term result is usually followed by a second test before deciding to fix. Source.

Can I test for radon myself?

Yes. The EPA notes that test kits are sold online and in home improvement stores, and that some states offer free or discounted kits. A professional test is common when buying or selling a home. Source.