Is Westmoreland County, VA a radon risk area?

EPA's own radon map rates Westmoreland County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Nationally, Westmoreland County ranks higher in radon potential than 13% of rated counties (the 13th percentile).

Where Westmoreland County sits nationally

About 19,235 people live in Westmoreland County, Virginia, spread over 229.327 square miles. That works out to roughly 84 people per square mile. Rank 635 by population within its EPA zone puts Westmoreland County at the 38th percentile among zone peers. EPA's geology-based Region 3 groups Westmoreland County with 244 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

A Zone 3 county like Westmoreland County is predicted closer to the 0.4 pCi/L typical outdoors than to EPA's 4 pCi/L action level. A Zone 3 label describes Westmoreland County's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

If Westmoreland County tests above the action level

Nothing about Westmoreland 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

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

More on how this number was built

The methodology guide shows exactly which EPA and Census sources feed Westmoreland County's numbers. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.