Belmont, MA Radon Mitigation and Testing

Q: What EPA Radon Zone is Belmont in?

Belmont is in Middlesex County, EPA Zone 1.

Q: How much does radon mitigation cost in Belmont?

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 within the Boston Metro area, Belmont lies atop New England's complex glacial geology where granite bedrock and glacial till can produce variable radon levels. The town's housing stock includes both historic colonial homes and mid-century suburban development, many with full stone or concrete basements typical of the region. Though specific testing data for zip code 02478 is currently limited, the EPA Zone 1 designation suggests residents should test their homes, particularly older properties with stone foundations.

Belmont, MA Radon Mitigation

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

Belmont, MA Radon Testing

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

Belmont Radon Facts

Key details about the radon risk profile for Belmont and the 02478 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Middlesex County, MA

Zip Code

02478

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Belmont and the 02478 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 Belmont, MA

What EPA Radon Zone is Belmont in?

Belmont and the 02478 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 Belmont?

Radon mitigation in Belmont 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 Belmont?

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