Mason County
Mason County is classified by the EPA’s 1993 Map of Radon Zones as 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.
Mason County falls into EPA Radon Zone 2, indicating moderate radon potential with predicted indoor screening levels between 2 and 4 pCi/L. It is one of 82 Zone 2 counties in Kentucky (68% of the state's 120 counties). That is a predicted screening level from the EPA's 1993 map, not a measured average, and many individual homes in Zone 2 areas still test above it. Factors like foundation type, soil conditions, and ventilation can push radon levels higher in specific homes.
Test for radon in Mason County
EPA Zone 2 means moderate radon potential (2-4 pCi/L predicted average). The EPA recommends testing every home; many individual Zone 2 homes test above 4 pCi/L.
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What This Means for Mason 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. If levels are elevated, mitigation systems are effective and relatively affordable.
New Construction
Radon-resistant new construction (RRNC) is recommended for new homes in Zone 1 and Zone 2 areas, so if you are building here, ask your builder to include it. 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.