New Hampshire's second-largest city in Hillsborough County shows an average radon level of 8.0 pCi/L, significantly exceeding EPA guidelines and requiring immediate homeowner attention. Nashua's diverse housing stock, from historic mill-era buildings to modern subdivisions, sits atop granite bedrock and glacial deposits that readily produce radon gas. Residents across zip codes 03060-03064 should prioritize professional testing and mitigation, especially in homes with finished basements where families spend significant time.
8.00
pCi/L average
Above EPA Action Level
Based on 2 user-submitted radon tests for homes in Nashua, NH. The EPA recommends taking action at or above 4.0 pCi/L.
0
4.0 EPA
10+
Nashua, NH Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
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User-submitted radon test readings from homes in the Nashua area.
Radon Level
City
Home Age
Foundation
6 pCi/L
Nashua, NH
21-50 Years
Full Basement
10 pCi/L
Nashua, NH
100+ Years
Full Basement
Have a radon test result for Nashua? Submit your reading to help other homeowners.
Radon FAQ for Nashua, NH
What is the average radon level in Nashua, NH?
Based on 2 user-submitted tests, the average radon level in Nashua is 8.00 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 Nashua in?
Nashua and the 03060 zip code are in Hillsborough 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 Nashua?
Radon mitigation in Nashua 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 Nashua?
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.
