Cheshire County
Cheshire County is classified as EPA Radon Zone 2, indicating moderate radon potential. The predicted average indoor radon screening level is between 2 and 4 pCi/L. While below the EPA action level, many individual homes in Zone 2 areas test above 4 pCi/L. The EPA recommends testing all homes regardless of zone.
What This Means for Cheshire County
Should You Test?
Yes. While Zone 2 has moderate predicted levels, many individual homes still test above 4 pCi/L. Home-specific factors like foundation type, soil permeability, and ventilation matter as much as the zone classification. A $15–$30 short-term test kit is the easiest way to find out.
Real Estate
Consider requesting a radon test during the home inspection process. Many real estate professionals in New Hampshire include radon testing as standard practice. If levels are elevated, mitigation systems are effective and relatively affordable ($800–$2,500).
New Construction
The EPA recommends considering radon-resistant new construction (RRNC) techniques in Zone 2 areas. These features add $350–$500 to construction costs and include a sub-slab gas collection layer, vapor barrier, sealed cracks, and a vent pipe to the roof. Much cheaper to install during construction than to retrofit.