Dorchester, MA Radon Mitigation and Testing

Q: What EPA Radon Zone is Dorchester in?

Dorchester is in Suffolk County, EPA Zone 3.

Q: How much does radon mitigation cost in Dorchester?

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

As a diverse neighborhood within Suffolk County and the greater Boston metro area, Dorchester (02121) sits in EPA Zone 3 where coastal New England geology typically produces lower radon levels. However, with limited testing data available, residents should still consider radon testing since urban areas can show surprising variation. The neighborhood's dense housing mix and varied foundation types make individual assessment valuable.

Dorchester, MA Radon Mitigation

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

Dorchester, MA Radon Testing

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

Dorchester Radon Facts

Key details about the radon risk profile for Dorchester and the 02121 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Suffolk County, MA

Zip Code

02121

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Dorchester and the 02121 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 Dorchester, MA

What EPA Radon Zone is Dorchester in?

Dorchester and the 02121 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 Dorchester?

Radon mitigation in Dorchester 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 Dorchester?

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