Wellesley, MA Radon Levels
Check local Wellesley radon levels and find certified testing and mitigation professionals to keep your home safe
Wellesley, MA Radon Facts
This affluent Boston Metro suburb in Norfolk County has recorded an average radon level of 7.5 pCi/L, which exceeds the EPA action threshold of 4.0 pCi/L. Wellesley's housing stock consists predominantly of well-maintained Colonial and Tudor-style homes built between 1920 and 1980, many with full basements where radon can accumulate. Given the elevated readings in zip code 02482, homeowners should prioritize radon testing and mitigation when levels exceed EPA guidelines.
Based on 1 user-submitted radon test for homes in Wellesley, MA. The EPA recommends taking action at or above 4.0 pCi/L.
Wellesley, MA Radon Mitigation
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Wellesley, MA Radon Levels
User-submitted radon test readings from homes in the Wellesley area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 4 pCi/L | Wellesley, MA | 100+ Years | Full Basement |
| 11 pCi/L | Wellesley, MA | 51-99 Years | Full Basement |
Have a radon test result for Wellesley? Submit your reading to help other homeowners.
Radon Readings Near Wellesley, MA
Compare radon levels in Wellesley with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Wellesley Hills | 1.7 mi | 8.50 pCi/L | 2 |
| Needham | 2.7 mi | 6.00 pCi/L | 1 |
| Natick | 3.0 mi | 4.50 pCi/L | 2 |
| Needham Heights | 3.4 mi | 4.00 pCi/L | 1 |
| Wayland | 4.8 mi | 10.67 pCi/L | 3 |
| West Newton | 5.3 mi | 4.00 pCi/L | 1 |
| Newtonville | 6.1 mi | 3.00 pCi/L | 1 |
| Newton Center | 6.5 mi | 4.50 pCi/L | 2 |
Norfolk County Radon Profile
The soils and bedrock of Norfolk County place it in EPA Radon Zone 2, a moderate-risk classification with predicted indoor averages of 2 to 4 pCi/L. Homeowner-submitted tests from 17 cities in Norfolk County average 8.08 pCi/L across 25 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Since radon is the second leading cause of lung cancer nationally, the EPA urges every household in Norfolk County to test, as levels can differ between neighboring homes.