Newton, MA Radon Levels

Q: What EPA Radon Zone is Newton in?

Newton is in Middlesex County, EPA Zone 1.

Q: Why are radon readings shown from areas near Newton?

No homeowner radon tests have been submitted for Newton yet, so readings from the closest cities and the Middlesex County average are used as the best available indicator of local conditions. The EPA recommends testing every individual home.

Q: How much does radon mitigation cost in Newton?

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

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

Newton, MA Radon Facts

EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)

County Middlesex County, MA

Zip Code 02458

Situated in Middlesex County within the Boston Metro, this historic city sits on glacial deposits over granite bedrock that commonly produce elevated radon levels throughout eastern Massachusetts. Testing data remains limited for zip code 02458, but residents should prioritize radon testing given New England's well-documented high radon potential from uranium-bearing granite.

7.28

pCi/L area average

Above EPA Action Level

Middlesex County average: 7.28 pCi/L, based on 90 user-submitted tests across 46 cities in the county. No homeowner readings have been submitted for Newton 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+

Newton, 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 Newton, MA

No homeowner tests have been submitted for Newton 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
Newtonville	1.1 mi	3.00 pCi/L	1
Newton Center	1.3 mi	4.50 pCi/L	2
West Newton	2.0 mi	4.00 pCi/L	1
Waltham	3.2 mi	4.00 pCi/L	1
Needham Heights	4.6 mi	4.00 pCi/L	1
Arlington	4.7 mi	4.00 pCi/L	2
Somerville	4.9 mi	4.50 pCi/L	4
Wellesley Hills	5.3 mi	8.50 pCi/L	2

Middlesex County Radon Profile

The bedrock and soils beneath Middlesex County are classified by the EPA as Radon Zone 1, the highest-risk tier, with predicted average indoor screening levels above 4 pCi/L. Homeowner-submitted tests from 46 cities in Middlesex County average 7.28 pCi/L across 90 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Radon is the second leading cause of lung cancer in the United States, and a short-term test is the only way to confirm a specific home's level in Middlesex County.

Radon FAQ for Newton, MA

What EPA Radon Zone is Newton in?

Newton and the 02458 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.

Why are radon readings shown from areas near Newton?

No homeowner radon tests have been submitted for Newton yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Middlesex County average—are the best available indicator of local conditions until Newton 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 Newton?

Radon mitigation in Newton 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 Newton?

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.