Is York County, VA a radon risk area?

York County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Nationally, York County ranks higher in radon potential than 24% of rated counties (the 24th percentile).

York County by the numbers

About 71,410 people live in York County, Virginia, spread over 104.703 square miles. Population density there runs about 682 people per square mile. Rank 266 by population within its EPA zone puts York County at the 74th percentile among zone peers. York 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

At Zone 3, York County's predicted county average is under the national indoor average (~1.3 pCi/L) and well below EPA's 4 pCi/L action level — outdoor air nationally runs about 0.4 pCi/L for comparison. Low doesn't mean zero: EPA's own data shows homes in Zone 3 counties like York County testing above the action level often enough that skipping a test isn't the safe assumption.

Testing and mitigation in York County

Nothing about York County'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

York County's test kit answers today; a Airthings radon monitor keeps answering for York 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

The methodology guide shows exactly which EPA and Census sources feed York County's numbers. Whatever zone York County carries, the zone explainer covers what it does and doesn't tell you about any one house.