Durham, CT Radon Mitigation and Testing

Q: What EPA Radon Zone is Durham in?

Durham is in Middlesex County, EPA Zone 1.

Q: How much does radon mitigation cost in Durham?

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

Middlesex County

EPA Zone 1

Situated in Middlesex County in central Connecticut, Durham's radon potential is influenced by the region's complex geology of metamorphic bedrock and glacial till deposits. The town's housing stock in zip code 06422 includes both historic colonial-era homes and modern suburban developments, many featuring full basements typical of New England construction. Without sufficient local testing data available, residents should conduct radon testing as Connecticut's varied geology can produce unexpected radon concentrations even within the same community.

Durham, CT Radon Mitigation

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

Durham, CT Radon Testing

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

Durham Radon Facts

Key details about the radon risk profile for Durham and the 06422 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Middlesex County, CT

Zip Code

06422

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Durham and the 06422 zip code are located in Middlesex 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 Durham, CT

What EPA Radon Zone is Durham in?

Durham and the 06422 zip code are in Middlesex 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 Durham?

Radon mitigation in Durham 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 Durham?

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