Is Fluvanna County, VA a radon risk area?

EPA places Fluvanna County in Zone 1 - Highest Potential — a predicted county-wide average indoor radon level above 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Rank it against the rest of the country and Fluvanna County lands in the 85th percentile for radon potential.

Fluvanna County by the numbers

About 28,746 people live in Fluvanna County, Virginia, spread over 287.12 square miles. Population density there runs about 100 people per square mile. Rank 480 by population within its EPA zone puts Fluvanna County at the 55th percentile among zone peers. Geologically, Fluvanna County is grouped into EPA Region 3 alongside 244 other counties that share its rock and soil setting.

What this actually means for a house in Fluvanna County

Outdoor air nationally averages about 0.4 pCi/L, indoor air about 1.3 pCi/L — Fluvanna County's Zone 1 prediction clears both of those and EPA's fix-it threshold besides. EPA's guidance doesn't change because of a Zone 1 label: test the house. What changes is the reason to not put it off in Fluvanna County specifically.

Testing and mitigation in Fluvanna County

Nothing about Fluvanna 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

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

Fluvanna 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.