Floyd County, VA: EPA's radon zone, explained

EPA's own radon map rates Floyd County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Nationally, Floyd County ranks higher in radon potential than 44% of rated counties (the 44th percentile).

Where Floyd County sits nationally

Floyd County, Virginia is home to about 15,658 people across 380.923 square miles. Population density there runs about 41 people per square mile. By population, Floyd County is the 702nd largest of every county sharing its EPA zone — the 32nd percentile by population within that zone. Geologically, Floyd County is grouped into EPA Region 3 alongside 244 other counties that share its rock and soil setting.

Zone vs. an actual test

Floyd 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). A Zone 2 rating is a moderate county-wide average, not a guarantee about any one house in Floyd County — testing is the only way to know an individual home's actual level.

Next steps for a home in Floyd County

For a Floyd County homeowner, the order is simple: test first, since a kit costs a small fraction of what mitigation would. Only if the result clears 4 pCi/L does a system — typically $800–$2,500, about $1,200 for a common install — become worth pricing out.

Find Virginia's state radon program

For Floyd County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Floyd 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 Floyd County's figures come from

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. Whatever zone Floyd County carries, the zone explainer covers what it does and doesn't tell you about any one house.