Colchester, CT Radon Mitigation and Testing

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

Based on 1 user-submitted tests, the average radon level is 5.00 pCi/L.

Q: What EPA Radon Zone is Colchester in?

Colchester is in New London County, EPA Zone 1.

Q: How much does radon mitigation cost in Colchester?

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

Avg: 5.00 pCi/L

New London County

EPA Zone 1

1 user test

Located in New London County in southeastern Connecticut, Colchester sits on glacial deposits and crystalline bedrock that place it within EPA Zone 1. Recent testing in zip code 06415 shows an average radon level of 5.0 pCi/L, which exceeds the EPA's 4.0 pCi/L action level. This reading suggests homeowners should consider radon mitigation systems, particularly in basement areas where radon gas naturally accumulates in Connecticut's colonial and post-war housing stock.

5.00

pCi/L average

Above EPA Action Level

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

4.0 EPA

10+

Colchester, CT Radon Mitigation

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

Colchester, CT Radon Testing

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

Colchester, Connecticut Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
5 pCi/L	Colchester, CT	0-20 Years	Full Basement	Oct 2016

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

Colchester Radon Facts

Key details about the radon risk profile for Colchester and the 06415 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

New London County, CT

Zip Code

06415

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

5.00 pCi/L

User Tests Submitted

Colchester and the 06415 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 Colchester, CT

What is the average radon level in Colchester, CT?

Based on 1 user-submitted test, the average radon level in Colchester is 5.00 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 Colchester in?

Colchester and the 06415 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 Colchester?

Radon mitigation in Colchester 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 Colchester?

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