Brantley County, GA: EPA's radon zone, explained

EPA's own radon map rates Brantley County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. That puts Brantley County in the 12th percentile nationally for radon potential — higher than 12% of the counties EPA has rated.

Where Brantley County sits nationally

Brantley County, Georgia is home to about 18,795 people across 443.241 square miles. That works out to roughly 42 people per square mile. By population, Brantley County is the 645th largest of every county sharing its EPA zone — the 37th percentile by population within that zone. Geologically, Brantley County is grouped into EPA Region 4 alongside 735 other counties that share its rock and soil setting.

Why the zone isn't the answer by itself

Brantley County's predicted average sits below the national indoor average of about 1.3 pCi/L, well under EPA's 4 pCi/L action level. A Zone 3 rating means Brantley County's county-wide average is predicted low, but EPA is explicit that a meaningful share of homes in low-potential zones still test above the action level — a low zone is not a reason to skip testing.

Testing and mitigation in Brantley County

For a Brantley County homeowner, the order is simple: test first, since a kit costs a small fraction of what mitigation would. Only if the result clears 4 pCi/L does a system — typically $800–$2,500, about $1,200 for a common install — become worth pricing out.

Find Georgia's state radon program

For Brantley County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Brantley County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. Code RADONZONE-10OFF takes 10% off at checkout.

Where Brantley County's figures come from

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