Franklin in Merrimack County sits along the Merrimack River in central New Hampshire, where granite bedrock contributes to the state's elevated radon potential. While specific testing data for zip code 03235 is limited, the area falls within EPA Zone 2, indicating moderate radon risk. New Hampshire's geology and prevalence of basement foundations make radon testing particularly important for homeowners throughout the region.
Franklin, NH Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
Franklin, NH Radon Testing
Finding qualified radon testing professionals is the first step toward protecting your home.
Franklin Radon Facts
Key details about the radon risk profile for Franklin and the 03235 zip code area.
EPA Radon Zone
Zone 2 — Moderate Risk
County
Merrimack County, NH
Zip Code
03235
Predicted Screening Level
2–4 pCi/L (Zone 2)
Franklin and the 03235 zip code are located in Merrimack 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 Franklin, NH
What EPA Radon Zone is Franklin in?
Franklin and the 03235 zip code are in Merrimack 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 Franklin?
Radon mitigation in Franklin 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 Franklin?
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.
