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

Lee County is mapped as Zone 1 - Highest Potential by EPA — meaning the county-wide average indoor level is predicted above 4 pCi/L. Nationally that's the 83rd percentile for radon potential — Lee County outranks 83% of every county EPA has rated.

How Lee County compares

Lee County, Virginia is home to about 21,780 people across 435.378 square miles. Averaged across its land area, Lee County runs about 50 people per square mile. By population, Lee County is the 543rd largest of every county sharing its EPA zone — the 49th percentile by population within that zone. Lee County falls in EPA Radon Region 3, one of 245 counties nationally EPA assigns to that same geologic province.

Why the zone isn't the answer by itself

Lee County's predicted average sits above EPA's own action level of 4 pCi/L — the concentration at which EPA recommends fixing a home — versus a national average around 1.3 pCi/L indoors and 0.4 pCi/L outdoors. Some Lee County homes will test comfortably under the action level despite the county's Zone 1 rating — the only way to know which kind of home you have is an actual test.

Next steps for a home in Lee County

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

Where Lee County's figures come from

Lee County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.