Winchester, MA Radon Levels
Check local Winchester radon levels and find certified testing and mitigation professionals to keep your home safe
Winchester, MA Radon Facts
This Boston metropolitan area community in Middlesex County shows an average radon level of 4.0 pCi/L, right at the EPA's action threshold based on recent testing. Winchester's location on New England's glacial deposits and granite bedrock creates conditions that can produce variable radon levels across zip code 01890. Given the prevalence of full basements in the area's predominantly older housing stock, continued testing remains important for all residents.
Based on 2 user-submitted radon tests for homes in Winchester, MA. The EPA recommends taking action at or above 4.0 pCi/L.
Winchester, MA Radon Mitigation
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Winchester, MA Radon Levels
User-submitted radon test readings from homes in the Winchester area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 4 pCi/L | Winchester, MA | 51-99 Years | — |
Have a radon test result for Winchester? Submit your reading to help other homeowners.
Radon Readings Near Winchester, MA
Compare radon levels in Winchester with the closest nearby cities that have user-submitted test data.
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.