Charlestown, MA Radon Mitigation and Testing

Q: What EPA Radon Zone is Charlestown in?

Charlestown is in Suffolk County, EPA Zone 3.

Q: How much does radon mitigation cost in Charlestown?

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

Suffolk County

EPA Zone 3

Located in Suffolk County as part of Boston's urban core, Charlestown sits on glacial deposits and underlying bedrock typical of eastern Massachusetts. Testing data for the 02129 zip code area remains sparse, making individual radon testing important for residents of this historic neighborhood. The area's dense mix of 19th-century row houses and modern high-rise developments presents varying radon risk profiles depending on construction type and foundation characteristics.

Charlestown, MA Radon Mitigation

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

Charlestown, MA Radon Testing

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

Charlestown Radon Facts

Key details about the radon risk profile for Charlestown and the 02129 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Suffolk County, MA

Zip Code

02129

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Charlestown and the 02129 zip code are located in Suffolk County, which has an EPA assigned Radon Zone of 3. A radon zone of 3 predicts an average indoor radon screening level less than 2 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Charlestown, MA

What EPA Radon Zone is Charlestown in?

Charlestown and the 02129 zip code are in Suffolk County, which has an EPA assigned Radon Zone of 3. A zone of 3 predicts an average indoor radon screening level less than 2 pCi/L.

How much does radon mitigation cost in Charlestown?

Radon mitigation in Charlestown 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 Charlestown?

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