Northborough, MA Radon Levels
Check local Northborough radon levels and find certified testing and mitigation professionals to keep your home safe
Northborough, MA Radon Facts
Northborough in Worcester County shows an average radon level of 6.0 pCi/L based on local testing, which exceeds the EPA action threshold of 4.0 pCi/L. The town's granite bedrock foundation and predominantly basement-equipped homes built in the post-war suburban era create conditions where radon can accumulate. Residents in zip code 01532 should prioritize radon testing and mitigation, especially in finished basement areas.
Based on 2 user-submitted radon tests for homes in Northborough, MA. The EPA recommends taking action at or above 4.0 pCi/L.
Northborough, MA Radon Mitigation
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Northborough, MA Radon Levels
User-submitted radon test readings from homes in the Northborough area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 5 pCi/L | Northborough, MA | 21-50 Years | Full Basement |
| 7 pCi/L | Northborough, MA | 21-50 Years | Partial Basement |
Have a radon test result for Northborough? Submit your reading to help other homeowners.
Radon Readings Near Northborough, MA
Compare radon levels in Northborough with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Westborough | 3.8 mi | 6.00 pCi/L | 2 |
| Shrewsbury | 4.4 mi | 10.00 pCi/L | 2 |
| Marlborough | 5.7 mi | 13.50 pCi/L | 2 |
| Clinton | 7.1 mi | 17.00 pCi/L | 1 |
| Grafton | 8.4 mi | 11.00 pCi/L | 1 |
| Hopkinton | 9.1 mi | 9.33 pCi/L | 3 |
| Worcester | 9.2 mi | 17.67 pCi/L | 3 |
| Lancaster | 9.4 mi | 5.00 pCi/L | 1 |
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.