Southborough, MA Radon Levels

Q: What EPA Radon Zone is Southborough in?

Southborough is in Worcester County, EPA Zone 1.

Q: How much does radon mitigation cost in Southborough?

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

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

Southborough, MA Radon Facts

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

County Worcester County, MA

Zip Code 01772

Positioned in Worcester County within the Worcester Metro region, Southborough sits on New England's typical granite and gneiss bedrock formations. With radon testing data currently limited for this suburban community, homeowners should prioritize testing given the geological potential for radon in central Massachusetts.

9.12

pCi/L area average

Above EPA Action Level

Worcester County average: 9.12 pCi/L, based on 41 user-submitted tests across 28 cities in the county. No homeowner readings have been submitted for Southborough 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+

Southborough, 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 Southborough?

100% Free, No-Obligation Quotes
Matches You with State-Licensed Worcester County Pros

1-800-299-3578 978-208-3171 (local) Toll-free · Mon–Fri 8am–6pm ET

Radon Readings Near Southborough, MA

No homeowner tests have been submitted for Southborough 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
Marlborough	4.0 mi	13.50 pCi/L	2
Ashland	4.7 mi	5.33 pCi/L	3
Westborough	4.7 mi	6.00 pCi/L	2
Hopkinton	5.2 mi	9.33 pCi/L	3
Framingham	5.2 mi	6.50 pCi/L	2
Northborough	6.1 mi	6.00 pCi/L	2
Holliston	8.0 mi	4.00 pCi/L	1
Sudbury	8.2 mi	5.50 pCi/L	2

Worcester County Radon Profile

The bedrock and soils beneath Worcester 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 28 cities in Worcester County average 9.12 pCi/L across 41 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 Worcester County.

Radon FAQ for Southborough, MA

What EPA Radon Zone is Southborough in?

Southborough and the 01772 zip code are in Worcester 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 Southborough?

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

Radon mitigation in Southborough 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 Southborough?

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.