This Hillsborough County community in the Manchester Metro area shows a concerning average radon level of 9.0 pCi/L from initial testing, well above EPA action thresholds in zip code 03054. New Hampshire's granite-rich bedrock and glacial deposits contribute to some of the nation's highest radon readings, making Merrimack no exception. The combination of uranium-bearing bedrock and the area's predominantly basement-equipped homes creates conditions where professional mitigation is often necessary.
9.00
pCi/L average
Above EPA Action Level
Based on 1 user-submitted radon test for homes in Merrimack, NH. The EPA recommends taking action at or above 4.0 pCi/L.
0
4.0 EPA
10+
Merrimack, 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 Merrimack area.
Radon Level
City
Home Age
Foundation
9 pCi/L
Merrimack, NH
0-20 Years
Full Basement
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Radon FAQ for Merrimack, NH
What is the average radon level in Merrimack, NH?
Based on 1 user-submitted test, the average radon level in Merrimack is 9.00 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 Merrimack in?
Merrimack and the 03054 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 Merrimack?
Radon mitigation in Merrimack 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 Merrimack?
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.
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Cities in New Hampshire with the most user-submitted radon test data, ranked by number of submissions.
