Is Sussex County, VA a radon risk area?

Sussex County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Sussex County sits at the 7th percentile nationally for radon potential — above 7 of every 100 rated counties.

Where Sussex County sits nationally

About 10,753 people live in Sussex County, Virginia, spread over 490.244 square miles. That works out to roughly 22 people per square mile. Rank 804 by population within its EPA zone puts Sussex County at the 22nd percentile among zone peers. Geologically, Sussex County is grouped into EPA Region 3 alongside 244 other counties that share its rock and soil setting.

Why the zone isn't the answer by itself

A Zone 3 county like Sussex County is predicted closer to the 0.4 pCi/L typical outdoors than to EPA's 4 pCi/L action level. Even at Zone 3, Sussex County homes are not guaranteed a low reading — zone is a county-wide average, and EPA recommends testing every home regardless of zone.

Next steps for a home in Sussex County

Nothing about Sussex 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

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

Sussex County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. Whatever zone Sussex County carries, the zone explainer covers what it does and doesn't tell you about any one house.