Old Greenwich, CT Radon Levels

Q: What is the average radon level in Old Greenwich, CT?

Based on 2 user-submitted tests, the average radon level is 5.50 pCi/L.

Q: What EPA Radon Zone is Old Greenwich in?

Old Greenwich is in Fairfield County, EPA Zone 1.

Q: How much does radon mitigation cost in Old Greenwich?

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

Check local Old Greenwich radon levels and find certified testing and mitigation professionals to keep your home safe

Old Greenwich, CT Radon Facts

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

County Fairfield County, CT

Zip Code 06870

Avg. User Level 5.50 pCi/L

User Tests 2

Part of Greenwich in Fairfield County, Old Greenwich sits on glacial deposits and bedrock formations along Long Island Sound. Testing data reveals an average radon level of 5.5 pCi/L, exceeding the EPA action threshold of 4.0 pCi/L. The area's Zone 1 classification and mix of older estates and newer homes make radon testing crucial for residents in zip code 06870.

5.50

pCi/L average

Above EPA Action Level

Based on 2 user-submitted radon tests for homes in Old Greenwich, CT. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Old Greenwich, CT Radon Mitigation

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Old Greenwich, CT Radon Levels

User-submitted radon test readings from homes in the Old Greenwich area.

Radon Level	City	Home Age	Foundation
4 pCi/L	Old Greenwich, CT	0-20 Years	Full Basement
7 pCi/L	Old Greenwich, CT	0-20 Years	Full Basement

Have a radon test result for Old Greenwich? Submit your reading to help other homeowners.

Radon FAQ for Old Greenwich, CT

What is the average radon level in Old Greenwich, CT?

Based on 2 user-submitted tests, the average radon level in Old Greenwich is 5.50 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 Old Greenwich in?

Old Greenwich and the 06870 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 Old Greenwich?

Radon mitigation in Old Greenwich 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 Old Greenwich?

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

Old Greenwich, CT Radon Levels

Check local Old Greenwich radon levels and find certified testing and mitigation professionals to keep your home safe

Old Greenwich, CT Radon Facts

Old Greenwich, CT Radon Mitigation

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Old Greenwich, CT Radon Levels

Radon FAQ for Old Greenwich, CT

Most Active Radon Markets in Connecticut

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