Brookline, MA Radon Levels

Q: What EPA Radon Zone is Brookline in?

Brookline is in Norfolk County, EPA Zone 2.

Q: How much does radon mitigation cost in Brookline?

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

Check local Brookline radon levels and find certified testing and mitigation professionals to keep your home safe

Brookline, MA Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Norfolk County, MA

Zip Code 02445

This affluent Boston Metro suburb in Norfolk County sits over glacial deposits and underlying bedrock that can create moderate radon conditions in residential properties. The community's dense housing stock in zip code 02445 ranges from Victorian-era homes to modern condominiums, with many featuring full basements typical of New England construction. While specific testing data for this area remains limited, homeowners should conduct radon testing given the geological setting and the prevalence of below-grade living spaces.

8.08

pCi/L area average

Above EPA Action Level

Norfolk County average: 8.08 pCi/L, based on 25 user-submitted tests across 17 cities in the county. No homeowner readings have been submitted for Brookline itself yet, so this county figure is the closest available benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Brookline, MA Radon Mitigation

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

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Radon Readings Near Brookline, MA

No homeowner tests have been submitted for Brookline yet. The closest cities with user-submitted radon data are shown below — explore them to gauge local conditions. Radon varies by home, so testing is the only way to know your level.

City	Distance	Avg User Level	Readings
Newton Center	2.8 mi	4.50 pCi/L	2
Roslindale	3.5 mi	6.00 pCi/L	1
Somerville	4.1 mi	4.50 pCi/L	4
Newtonville	4.3 mi	3.00 pCi/L	1
West Newton	5.1 mi	4.00 pCi/L	1
Medford	5.8 mi	8.00 pCi/L	3
Needham Heights	6.0 mi	4.00 pCi/L	1
Arlington	6.1 mi	4.00 pCi/L	2

Norfolk County Radon Profile

The soils and bedrock of Norfolk County place it in EPA Radon Zone 2, a moderate-risk classification with predicted indoor averages of 2 to 4 pCi/L. Homeowner-submitted tests from 17 cities in Norfolk County average 8.08 pCi/L across 25 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Since radon is the second leading cause of lung cancer nationally, the EPA urges every household in Norfolk County to test, as levels can differ between neighboring homes.

Radon FAQ for Brookline, MA

What EPA Radon Zone is Brookline in?

Brookline and the 02445 zip code are in Norfolk 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.

Why are radon readings shown from areas near Brookline?

No homeowner radon tests have been submitted for Brookline yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Norfolk County average—are the best available indicator of local conditions until Brookline homeowners submit their own results. The EPA still recommends testing every individual home, since levels can vary significantly from house to house.

How much does radon mitigation cost in Brookline?

Radon mitigation in Brookline 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 Brookline?

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.