Is Williamsburg city, VA a radon risk area?

EPA's own radon map rates Williamsburg city zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Nationally, Williamsburg city ranks higher in radon potential than 11% of rated counties (the 11th percentile).

Where Williamsburg city sits nationally

About 16,030 people live in Williamsburg city, Virginia, spread over 8.938 square miles. Population density there runs about 1,793 people per square mile. Rank 693 by population within its EPA zone puts Williamsburg city at the 33rd percentile among zone peers.

What this actually means for a house in Williamsburg city

Well clear of both the 1.3 pCi/L national indoor average and EPA's 4 pCi/L action level, Williamsburg city's Zone 3 prediction is the low end of the scale. A Zone 3 label describes Williamsburg city's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

If Williamsburg city tests above the action level

Nothing about Williamsburg city's EPA zone changes the mitigation number: $800–$2,500 nationally (around $1,200 typical), set by the house's foundation rather than the county it sits in — and only relevant once a test actually clears 4 pCi/L.

Find Virginia's state radon program

Williamsburg city's test kit answers today; a Airthings radon monitor keeps answering for Williamsburg city 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. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.