Charlestown, NH Radon Levels
Check local Charlestown radon levels and find certified testing and mitigation professionals to keep your home safe
Charlestown, NH Radon Facts
EPA Radon Zone
Zone 2 — Moderate Risk
2–4 pCi/L (Zone 2)
County
Sullivan County, NH
Zip Code
03603
Situated in Sullivan County within New Hampshire's Connecticut River valley, Charlestown occupies terrain where glacial deposits over granite bedrock can create elevated radon conditions. With limited testing data available for the 03603 zip code, local homeowners should prioritize individual radon measurements. The town's mix of historic colonial homes and newer construction, many with full basements typical of New England, requires careful radon monitoring given the region's geological characteristics.
Charlestown, NH Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
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Radon FAQ for Charlestown, NH
What EPA Radon Zone is Charlestown in?
Charlestown and the 03603 zip code are in Sullivan 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 Charlestown?
Radon mitigation in Charlestown 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 Charlestown?
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.