As New Hampshire's largest city in Hillsborough County, Manchester spans multiple zip codes including 03101, 03102, 03103, 03104, and 03109 across diverse neighborhoods. The city's housing ranges from historic mill worker tenements to modern suburban developments, with basement construction predominant throughout the region. Given New Hampshire's granite bedrock and the limited current testing data, professional radon testing is recommended for homeowners across all of Manchester's residential areas.
Manchester, NH Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
Manchester, NH Radon Testing
Finding qualified radon testing professionals is the first step toward protecting your home.
Manchester Radon Facts
Key details about the radon risk profile for Manchester and the 03101 zip code area.
EPA Radon Zone
Zone 2 — Moderate Risk
County
Hillsborough County, NH
Zip Code
03101
Predicted Screening Level
2–4 pCi/L (Zone 2)
Manchester and the 03101 zip code are located in Hillsborough County, which has an EPA assigned Radon Zone of 2. A radon zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L. The EPA recommends testing every home regardless of zone classification.
Radon FAQ for Manchester, NH
What EPA Radon Zone is Manchester in?
Manchester and the 03101 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 Manchester?
Radon mitigation in Manchester 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 Manchester?
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 with the most user-submitted radon test data in the state.
