Is Winchester city, VA a radon risk area?

EPA's own radon map rates Winchester city zone 1 - highest potential, predicting a county-wide average indoor level above 4 pCi/L. Nationally that's the 84th percentile for radon potential — Winchester city outranks 84% of every county EPA has rated.

Where Winchester city sits nationally

About 27,800 people live in Winchester city, Virginia, spread over 9.193 square miles. Averaged across its land area, Winchester city runs about 3,024 people per square mile. Rank 486 by population within its EPA zone puts Winchester city at the 54th percentile among zone peers.

Why the zone isn't the answer by itself

Winchester city carries a Zone 1 label because its predicted average clears 4 pCi/L outright — three-plus times the 0.4 pCi/L typical outdoors and above the 1.3 pCi/L most homes see. That doesn't mean every Winchester city house tests high — a zone is a county-wide prediction, never a single-home reading — but it's a reason to test sooner rather than let it wait.

If Winchester city tests above the action level

Nothing about Winchester 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

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

More on how this number was built

Winchester city's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.