What EPA's radon map says about King George County

EPA's own radon map rates King George County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Nationally, King George County ranks higher in radon potential than 17% of rated counties (the 17th percentile).

How King George County compares

About 28,816 people live in King George County, Virginia, spread over 179.628 square miles. Averaged across its land area, King George County runs about 160 people per square mile. Among counties sharing King George County's EPA zone, it outranks 52% of them by population. EPA's geology-based Region 3 groups King George County with 244 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

King George County's Zone 3 prediction undercuts the roughly 1.3 pCi/L most US homes average, nowhere near EPA's 4 pCi/L threshold for recommending mitigation. A Zone 3 rating means King George County's county-wide average is predicted low, but EPA is explicit that a meaningful share of homes in low-potential zones still test above the action level — a low zone is not a reason to skip testing.

Next steps for a home in King George County

Mitigation cost doesn't depend on King George County's zone — it depends on the house's foundation. A typical system runs $800–$2,500 (about $1,200 typical), and testing first is what tells you whether that's needed at all.

Find Virginia's state radon program

King George County's test kit answers today; a Airthings radon monitor keeps answering for King George County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. RADONZONE-10OFF at checkout knocks 10% off.

More on how this number was built

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