Radon testing & mitigation companies in Fairfield County

An independent, hand-verified directory of companies that test for radon and install radon mitigation systems in Fairfield County, Connecticut. Every fact below comes from the company's own website, as recorded in our research. Where a company publishes no address, no rating or no license number on its own site, we say so plainly instead of filling the gap from a directory.

Three different kinds of company — do not confuse them

Not every company on this list does the same job. Radon mitigation specialists test for radon and install mitigation systems, or mitigate as their main service. Water and radon companies work mainly with well water and treat radon in water, and some also mitigate radon in air — each profile says which. Testing-only inspection companies test for radon and do not install mitigation systems. A testing-only company must never be mistaken for a mitigator: if a test result calls for mitigation, a testing-only company cannot install the system itself. Each profile states the company's type so you can shortlist the right kind of company first.

What the research found

• 23 companies with their own websites, approved one by one.
• Only 4 of the 23 publish a license or certification number on their own website: CT Radon and Well Water Solutions, Northeast Radon Mitigation Specialists, HSW Radon Contractors and Houseworks Home Services. The other 19 either claim to be licensed or certified without publishing a number, or publish no number at all. In Connecticut there is no state radon license as such: the framework is national certification (NRPP or NRSB) plus Home Improvement Contractor registration, and this guide records numbers exactly as the company's own site publishes them.
• None of the 23 publishes a rating with a review count on its own website. Profiles show no rating; where a company's own site makes an uncounted claim (individual testimonials, a 'top-rated' label, a Google badge with no figure in text), the profile explains why no rating is shown.
• No company in this guide publishes a fixed mitigation price on its own website. The only fixed prices published are testing prices from one company, The Proper Inspection, listed in the cost guide and on that company's profile. They are testing prices, not mitigation prices.
• 8 of the 23 companies test only and do not mitigate: The Proper Inspection, RTK Environmental Group, On Point Home Inspections, Allied Home Inspections, Pillar To Post (Fairfield County), Sonic Home Inspections, Fairfield County Home Inspections and SafeGuard Home Inspection.
• Service-area companies serve Fairfield County but either publish an office outside the county or publish no street address on their own site. They are marked as such.

Radon rises from the ground

Radon is a natural gas released from soil and rock that can enter a home through foundation cracks, joints and sump pits. Testing is the only way to know a home's level, and a mitigation system draws the gas out and vents it above the roof.

All 23 companies