Dennis, MA Radon Mitigation and Testing

Q: What EPA Radon Zone is Dennis in?

Dennis is in Barnstable County, EPA Zone 2.

Q: How much does radon mitigation cost in Dennis?

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 within the Cape Cod Metro area, Dennis sits on glacial outwash deposits and sandy soils typical of the region. Current testing data for zip code 02638 is limited, though Cape Cod's sandy geology typically produces lower radon levels. Despite generally moderate risk, homeowners should still test since geological variations and home construction factors can influence individual readings.

Dennis, MA Radon Mitigation

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

Dennis, MA Radon Testing

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

Dennis Radon Facts

Key details about the radon risk profile for Dennis and the 02638 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Barnstable County, MA

Zip Code

02638

Predicted Screening Level

2–4 pCi/L (Zone 2)

Dennis and the 02638 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 Dennis, MA

What EPA Radon Zone is Dennis in?

Dennis and the 02638 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 Dennis?

Radon mitigation in Dennis 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 Dennis?

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