Groton, CT Radon Mitigation and Testing

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

Based on 1 user-submitted tests, the average radon level is 4.00 pCi/L.

Q: What EPA Radon Zone is Groton in?

Groton is in New London County, EPA Zone 1.

Q: How much does radon mitigation cost in Groton?

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

Avg: 4.00 pCi/L

New London County

EPA Zone 1

1 user test

Groton sits in New London County along Connecticut's southeastern coast, where the region's varied bedrock geology can produce moderate radon levels in some areas. Testing data shows an average radon level of 4.0 pCi/L, which meets the EPA action threshold and suggests homeowners should evaluate mitigation options. The community's diverse housing stock in zip codes 06334 and 06340 ranges from historic colonial structures to modern developments, with foundation types that can influence individual radon accumulation patterns.

4.00

pCi/L average

Above EPA Action Level

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

4.0 EPA

10+

Groton, CT Radon Mitigation

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

Groton, CT Radon Testing

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

Groton, Connecticut Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
4 pCi/L	Groton, CT	21-50 Years	Partial Basement	Apr 2019

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

Groton Radon Facts

Key details about the radon risk profile for Groton and the 06340 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

New London County, CT

Zip Code

06340

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

4.00 pCi/L

User Tests Submitted

Groton and the 06340 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 Groton, CT

What is the average radon level in Groton, CT?

Based on 1 user-submitted test, the average radon level in Groton 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 Groton in?

Groton and the 06340 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 Groton?

Radon mitigation in Groton 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 Groton?

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