Marlborough, MA Radon Levels
Check local Marlborough radon levels and find certified testing and mitigation professionals to keep your home safe
Marlborough, MA Radon Facts
Located in Middlesex County within the Boston Metro area, Marlborough has recorded a concerning average radon level of 13.5 pCi/L, significantly exceeding the EPA action threshold and indicating urgent need for mitigation measures. The city's diverse housing stock includes both historic structures and modern developments, many with full basements built on New England's granite and metamorphic bedrock formations. With readings in zip code 01752 ranging from 7.0 to 20.0 pCi/L, professional radon mitigation should be prioritized for affected properties.
Based on 2 user-submitted radon tests for homes in Marlborough, MA. The EPA recommends taking action at or above 4.0 pCi/L.
Marlborough, MA Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
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Marlborough, MA Radon Levels
User-submitted radon test readings from homes in the Marlborough area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 7 pCi/L | Marlborough, MA | 0-20 Years | Full Basement |
| 20 pCi/L | Marlborough, MA | 51-99 Years | Full Basement |
Have a radon test result for Marlborough? Submit your reading to help other homeowners.
Radon Readings Near Marlborough, MA
Compare radon levels in Marlborough with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Stow | 5.7 mi | 7.00 pCi/L | 1 |
| Northborough | 5.7 mi | 6.00 pCi/L | 2 |
| Sudbury | 6.3 mi | 5.50 pCi/L | 2 |
| Westborough | 6.9 mi | 6.00 pCi/L | 2 |
| Framingham | 7.1 mi | 6.50 pCi/L | 2 |
| Ashland | 8.0 mi | 5.33 pCi/L | 3 |
| Clinton | 8.5 mi | 17.00 pCi/L | 1 |
| Hopkinton | 9.1 mi | 9.33 pCi/L | 3 |
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.