Chatham, MA Radon Mitigation and Testing

Q: What EPA Radon Zone is Chatham in?

Chatham is in Barnstable County, EPA Zone 2.

Q: How much does radon mitigation cost in Chatham?

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

Barnstable County

EPA Zone 2

Positioned on Barnstable County's Cape Cod peninsula, Chatham features sandy glacial deposits and coastal plain sediments that influence local radon patterns. Limited testing data exists for this 02633 zip code area within the Cape Cod Metro, making individual home assessment important. The area's unique coastal geology and predominantly newer construction warrant professional radon evaluation.

Chatham, MA Radon Mitigation

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

Chatham, MA Radon Testing

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

Chatham Radon Facts

Key details about the radon risk profile for Chatham and the 02633 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Barnstable County, MA

Zip Code

02633

Predicted Screening Level

2–4 pCi/L (Zone 2)

Chatham and the 02633 zip code are located in Barnstable County, which has an EPA assigned Radon Zone of 2. A radon zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Chatham, MA

What EPA Radon Zone is Chatham in?

Chatham and the 02633 zip code are in Barnstable County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

How much does radon mitigation cost in Chatham?

Radon mitigation in Chatham 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 Chatham?

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 Massachusetts

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

City	Avg User Radon Level	Submissions
Littleton	9.40 pCi/L	5
Gloucester	8.40 pCi/L	5
Florence	7.40 pCi/L	5
Douglas	12.00 pCi/L	4
Weymouth	8.50 pCi/L	4
Mashpee	5.00 pCi/L	4
Natick	5.00 pCi/L	4
Worcester	17.67 pCi/L	3
Attleboro	10.00 pCi/L	3
Stoneham	9.67 pCi/L	3
Hopkinton	9.33 pCi/L	3
Medford	8.00 pCi/L	3
Boxford	6.67 pCi/L	3
Reading	5.67 pCi/L	3
Haverhill	5.00 pCi/L	3
Melrose	5.00 pCi/L	3
Somerville	4.33 pCi/L	3
Woburn	19.00 pCi/L	2
Marlborough	13.50 pCi/L	2
Cohasset	11.50 pCi/L	2