King and Queen County, VA: EPA's radon zone, explained

EPA's own radon map rates King and Queen County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. That puts King and Queen County in the 4th percentile nationally for radon potential — higher than 4% of the counties EPA has rated.

How King and Queen County compares

King and Queen County, Virginia is home to about 6,747 people across 315.145 square miles. Averaged across its land area, King and Queen County runs about 21 people per square mile. By population, King and Queen County is the 906th largest of every county sharing its EPA zone — the 12th percentile by population within that zone. Geologically, King and Queen County is grouped into EPA Region 3 alongside 244 other counties that share its rock and soil setting.

Zone vs. an actual test

King and Queen County's predicted average sits below the national indoor average of about 1.3 pCi/L, well under EPA's 4 pCi/L action level. Don't read Zone 3 as a pass for King and Queen County — EPA's guidance to test every home makes no exception for counties predicted low.

Next steps for a home in King and Queen County

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

Where King and Queen 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. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.