What EPA's radon map says about Bath County

EPA places Bath 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 Bath County lands in the 70th percentile for radon potential.

Where Bath County sits nationally

About 4,071 people live in Bath County, Virginia, spread over 529.202 square miles. Averaged across its land area, Bath County runs about 8 people per square mile. Among counties sharing Bath County's EPA zone, it outranks 11% of them by population. Bath County falls in EPA Radon Region 3, one of 245 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

Where the national indoor average runs about 1.3 pCi/L, Bath County's Zone 1 rating puts its predicted county average above EPA's 4 pCi/L action level itself. Some Bath County homes will test comfortably under the action level despite the county's Zone 1 rating — the only way to know which kind of home you have is an actual test.

Testing and mitigation in Bath County

Mitigation cost doesn't depend on Bath County's zone — it depends on the house's foundation. A typical system runs $800–$2,500 (about $1,200 typical), and testing first is what tells you whether that's needed at all.

Find Virginia's state radon program

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

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.