Sherborn, MA Radon Levels

Q: What EPA Radon Zone is Sherborn in?

Sherborn is in Middlesex County, EPA Zone 1.

Q: How much does radon mitigation cost in Sherborn?

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

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

Sherborn, MA Radon Facts

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

County Middlesex County, MA

Zip Code 01770

Affluent Sherborn in Middlesex County lies within the Boston Metro's western suburbs, where New England's granite bedrock and glacial deposits create high radon potential throughout the region. Testing data for zip code 01770 is currently limited, making individual home testing particularly important given the area's EPA Zone 1 classification and typical colonial-era housing stock.

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 Sherborn 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+

Sherborn, MA Radon Mitigation

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

Need Radon Mitigation or Testing in Sherborn?

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Radon Readings Near Sherborn, MA

No homeowner tests have been submitted for Sherborn yet, so the closest user-submitted readings from neighboring communities are shown below. Radon varies by home — testing is the only way to know your level.

Radon Level	City	Distance	Home Age	Foundation	Submitted
4 pCi/L	Holliston, MA	3.6 mi	21-50 Years	Full Basement	Feb 2021
2 pCi/L	Natick, MA	3.9 mi	100+ Years	Full Basement	Jan 2024
7 pCi/L	Natick, MA	3.9 mi	51-99 Years	Full Basement	Jan 2018
6 pCi/L	Natick, MA	3.9 mi	100+ Years	Full Basement	Apr 2017
5 pCi/L	Natick, MA	3.9 mi	21-50 Years	Full Basement	Apr 2016
6 pCi/L	Ashland, MA	4.3 mi	21-50 Years	Full Basement	Mar 2021
5 pCi/L	Ashland, MA	4.3 mi	21-50 Years	Full Basement	May 2018
7 pCi/L	Framingham, MA	4.8 mi	21-50 Years	Full Basement	Mar 2017

Readings are drawn from the nearest cities with submitted data. Have a result for Sherborn? Submit your reading to help your neighbors.

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 Sherborn, MA

What EPA Radon Zone is Sherborn in?

Sherborn and the 01770 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 Sherborn?

No homeowner radon tests have been submitted for Sherborn 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 Sherborn 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 Sherborn?

Radon mitigation in Sherborn 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 Sherborn?

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.

Radon Levels Near Sherborn, MA

User-submitted radon levels from the cities closest to Sherborn with recorded test data. Explore nearby communities to compare local readings.

City	Distance	Avg User Level	Submissions
Holliston	3.6 mi	4.00 pCi/L	1
Natick	3.9 mi	4.50 pCi/L	2
Ashland	4.3 mi	5.33 pCi/L	3
Framingham	4.8 mi	6.50 pCi/L	2
Wellesley	5.9 mi	4.00 pCi/L	1
Needham	7.3 mi	6.00 pCi/L	1
Wellesley Hills	7.5 mi	8.50 pCi/L	2
Hopkinton	7.8 mi	9.33 pCi/L	3