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New Canaan, CT Radon Levels

Check local New Canaan radon levels and find certified testing and mitigation professionals to keep your home safe


New Canaan, CT Radon Facts

EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)
County Fairfield County, CT
Zip Code 06840
Avg. User Level 4.00 pCi/L
User Tests 1

This affluent Fairfield County community records an average radon level of 4.0 pCi/L, precisely at the EPA action threshold. New Canaan's mix of historic estates and modern homes, many with full basements common to southwestern Connecticut, sits atop bedrock formations that can trap radon gas. Homeowners in ZIP code 06840 should test regularly, as even homes at the EPA threshold benefit from mitigation to reduce long-term health risks.

4.00
pCi/L average
Above EPA Action Level

Based on 1 user-submitted radon test for homes in New Canaan, CT. The EPA recommends taking action at or above 4.0 pCi/L.

0
4.0 EPA
10+

New Canaan, CT Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

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New Canaan, CT Radon Levels

User-submitted radon test readings from homes in the New Canaan area.

Radon LevelCityHome AgeFoundation
4 pCi/L New Canaan, CT 21-50 Years Full Basement

Have a radon test result for New Canaan? Submit your reading to help other homeowners.

Radon FAQ for New Canaan, CT

What is the average radon level in New Canaan, CT?
Based on 1 user-submitted test, the average radon level in New Canaan is 4.00 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.
What EPA Radon Zone is New Canaan in?
New Canaan and the 06840 zip code are in Fairfield County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.
How much does radon mitigation cost in New Canaan?
Radon mitigation in New Canaan typically costs between $800 and $2,000. Most homes with standard basements can be mitigated with a sub-slab depressurization system in the $1,000–$1,500 range. Factors that can increase cost include complex foundations, crawl spaces, or very high radon levels.
Should I test for radon if I'm buying a home in New Canaan?
Yes. Radon testing should be part of every home purchase. A short-term radon test is typically included as part of the home inspection process and costs $150–$250. If elevated levels are found, you can negotiate mitigation as part of the sale.

Most Active Radon Markets in Connecticut

Cities in Connecticut with the most user-submitted radon test data, ranked by number of submissions.

CityAvg User Radon LevelSubmissions
Hamden 4.75 pCi/L 4
West Hartford 4.25 pCi/L 4
Greenwich 7.67 pCi/L 3
Norwalk 7.00 pCi/L 1
Stamford 5.00 pCi/L 1
Middletown 4.00 pCi/L 1
Guilford No submissions 0
Ridgefield No submissions 0