Cambridge, MA Radon Levels
Check local Cambridge radon levels and find certified testing and mitigation professionals to keep your home safe
Cambridge, MA Radon Facts
Historic Cambridge in Middlesex County within the Boston Metro shows an average radon level of 5.0 pCi/L, which exceeds the EPA action threshold of 4.0 pCi/L. Home to prestigious universities and densely built neighborhoods, the city's housing includes everything from 19th-century brownstones to modern high-rises, with many older buildings featuring basement levels. The 02138 area's glacial geology and urban density create unique radon accumulation patterns that warrant professional testing and potential mitigation.
Middlesex County average: 7.28 pCi/L, based on 90 user-submitted tests across 46 cities in the county. No homeowner readings have been submitted for Cambridge itself yet, so this county figure is the closest available benchmark. The EPA recommends taking action at or above 4.0 pCi/L.
Cambridge, MA Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
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Cambridge, MA Radon Levels
User-submitted radon test readings from homes in the Cambridge area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 5 pCi/L | Cambridge, MA | 100+ Years | Full Basement |
Have a radon test result for Cambridge? Submit your reading to help other homeowners.
Radon Readings Near Cambridge, MA
Compare radon levels in Cambridge with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Somerville | 1.3 mi | 4.50 pCi/L | 4 |
| Medford | 3.1 mi | 8.00 pCi/L | 3 |
| Everett | 3.8 mi | 4.50 pCi/L | 2 |
| Arlington | 4.4 mi | 4.00 pCi/L | 2 |
| Malden | 4.5 mi | 5.00 pCi/L | 2 |
| Newton Center | 4.8 mi | 4.50 pCi/L | 2 |
| Newtonville | 5.4 mi | 3.00 pCi/L | 1 |
| Winchester | 5.9 mi | 4.00 pCi/L | 2 |
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.