Home to Dartmouth College in Grafton County, Hanover has recorded an average radon level of 4.0 pCi/L, which sits right at the EPA's action threshold, reflecting the area's granite bedrock and complex New England geology. The community's mix of historic colonial homes and modern construction, most with basements, creates varying conditions for radon accumulation. Residents of zip code 03755 should consider professional radon testing to ensure their specific property falls within safe ranges given the area's borderline readings.
4.00
pCi/L average
Above EPA Action Level
Based on 1 user-submitted radon test for homes in Hanover, NH. The EPA recommends taking action at or above 4.0 pCi/L.
0
4.0 EPA
10+
Hanover, NH Radon Mitigation
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User-submitted radon test readings from homes in the Hanover area.
Radon Level
City
Home Age
Foundation
4 pCi/L
hanover, NH
21-50 Years
Full Basement
Have a radon test result for Hanover? Submit your reading to help other homeowners.
Radon FAQ for Hanover, NH
What is the average radon level in Hanover, NH?
Based on 1 user-submitted test, the average radon level in Hanover is 4.00 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.
What EPA Radon Zone is Hanover in?
Hanover and the 03755 zip code are in Grafton County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.
How much does radon mitigation cost in Hanover?
Radon mitigation in Hanover typically costs between $800 and $2,000. Most homes with standard basements can be mitigated with a sub-slab depressurization system in the $1,000–$1,500 range. Factors that can increase cost include complex foundations, crawl spaces, or very high radon levels.
Should I test for radon if I'm buying a home in Hanover?
Yes. Radon testing should be part of every home purchase. A short-term radon test is typically included as part of the home inspection process and costs $150–$250. If elevated levels are found, you can negotiate mitigation as part of the sale.
Most Active Radon Markets in New Hampshire
Cities in New Hampshire with the most user-submitted radon test data, ranked by number of submissions.
