Is Franklin County, VA a radon risk area?

Franklin County is mapped as Zone 2 - Moderate Potential by EPA — meaning the county-wide average indoor level is predicted between 2 and 4 pCi/L. Nationally that's the 56th percentile for radon potential — Franklin County outranks 56% of every county EPA has rated.

Franklin County by the numbers

About 55,637 people live in Franklin County, Virginia, spread over 690.611 square miles. Averaged across its land area, Franklin County runs about 81 people per square mile. Rank 326 by population within its EPA zone puts Franklin County at the 68th percentile among zone peers. EPA's geology-based Region 3 groups Franklin County with 244 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Neither at the 4 pCi/L action level nor down at the roughly 1.3 pCi/L national indoor norm, Franklin County's Zone 2 prediction lands in the gap between the two. Franklin County's Zone 2 rating sits in the middle nationally; EPA's guidance is unchanged by that — test every home regardless of its zone.

Next steps for a home in Franklin County

Nothing about Franklin 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

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

Franklin County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.