Old Lyme, CT Radon Mitigation and Testing

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

Based on 3 user-submitted tests, the average radon level is 9.30 pCi/L.

Q: What EPA Radon Zone is Old Lyme in?

Old Lyme is in New London County, EPA Zone 1.

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

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

Avg: 9.30 pCi/L

New London County

EPA Zone 1

3 user tests

Situated along the Connecticut River estuary in New London County, Old Lyme features complex geology including glacial deposits over crystalline bedrock. Testing data shows concerning average radon levels of 9.33 pCi/L, more than double the EPA action threshold of 4.0 pCi/L. The community's Zone 1 classification and varied housing stock make radon testing essential for zip code 06371 residents.

9.30

pCi/L average

Above EPA Action Level

Based on 3 user-submitted radon tests for homes in Old Lyme, CT. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Old Lyme, CT Radon Mitigation

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

Old Lyme, CT Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Old Lyme, Connecticut Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
7 pCi/L	Old Lyme, CT	21-50 Years	Full Basement	Aug 2020
14 pCi/L	old lyme , CT	21-50 Years	Full Basement	Sep 2016

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

Old Lyme Radon Facts

Key details about the radon risk profile for Old Lyme and the 06371 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

New London County, CT

Zip Code

06371

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

9.30 pCi/L

User Tests Submitted

Old Lyme and the 06371 zip code are located in New London County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Old Lyme, CT

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

Based on 3 user-submitted tests, the average radon level in Old Lyme is 9.30 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 Lyme in?

Old Lyme and the 06371 zip code are in New London 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 Lyme?

Radon mitigation in Old Lyme 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 Lyme?

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 with the most user-submitted radon test data in the state.

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