New Haven, CT Radon Levels

Q: What is the average radon level in New Haven, CT?

Based on 1 user-submitted tests, the average radon level is 3.00 pCi/L.

Q: What EPA Radon Zone is New Haven in?

New Haven is in New Haven County, EPA Zone 1.

Q: How much does radon mitigation cost in New Haven?

Radon mitigation typically costs between $800 and $2,000. Most standard systems fall in the $1,000-$1,500 range.

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

New Haven, CT Radon Facts

EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)

County New Haven County, CT

Zip Code 06510

Avg. User Level 3.00 pCi/L

User Tests 1

Connecticut's third-largest city, New Haven in New Haven County spans multiple zip codes including 06510 and falls within EPA Zone 1. Testing data across these areas remains limited despite the high radon potential designation. The city's diverse housing stock, from historic properties to modern developments, combined with varied geological conditions, makes radon testing crucial for all residents.

3.00

pCi/L average

Below EPA Action Level

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

4.0 EPA

10+

New Haven, CT Radon Mitigation

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

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Radon FAQ for New Haven, CT

What is the average radon level in New Haven, CT?

Based on 1 user-submitted test, the average radon level in New Haven is 3.00 pCi/L. This is below the EPA's recommended action level of 4.0 pCi/L. However, we recommend all homes be tested regardless of your neighbor's results.

What EPA Radon Zone is New Haven in?

New Haven and the 06510 zip code are in New Haven 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 Haven?

Radon mitigation in New Haven 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 Haven?

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.

City	Avg User Radon Level	Submissions
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