Greene County, VA radon potential

EPA's own radon map rates Greene County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. That puts Greene County in the 47th percentile nationally for radon potential — higher than 47% of the counties EPA has rated.

Where Greene County sits nationally

Greene County, Virginia is home to about 21,744 people across 155.947 square miles. Population density there runs about 139 people per square mile. Within its own EPA zone, Greene County is bigger by population than 42% of the counties that share it. Geologically, Greene County is grouped into EPA Region 3 alongside 244 other counties that share its rock and soil setting.

What this actually means for a house in Greene County

Greene County's predicted average falls between EPA's 4 pCi/L action level and the national indoor average of about 1.3 pCi/L (outdoor air runs roughly 0.4 pCi/L). Middle-of-the-pack doesn't mean risk-free for any one Greene County address — a moderate county average still leaves individual homes to test either side of it.

Next steps for a home in Greene County

A short-term test kit is the standard first step and typically costs far less than mitigation itself. If a test comes back at or above 4 pCi/L, a radon mitigation system for a typical home runs roughly $800–$2,500 (around $1,200 for a common single-family install), driven mainly by foundation type, not by county.

Find Virginia's state radon program

For Greene County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Greene County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. Use code RADONZONE-10OFF at checkout for 10% off.

Where Greene County's figures come from

The methodology guide shows exactly which EPA and Census sources feed Greene County's numbers. Whatever zone Greene County carries, the zone explainer covers what it does and doesn't tell you about any one house.