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

EPA's own radon map rates Madison County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. That puts Madison County in the 51st percentile nationally for radon potential — higher than 51% of the counties EPA has rated.

How Madison County compares

Madison County, Georgia is home to about 32,771 people across 282.324 square miles. Population density there runs about 116 people per square mile. By population, Madison County is the 463rd largest of every county sharing its EPA zone — the 55th percentile by population within that zone. Geologically, Madison County is grouped into EPA Region 4 alongside 735 other counties that share its rock and soil setting.

What this actually means for a house in Madison County

Madison County's Zone 2 prediction clears the 1.3 pCi/L national indoor average without reaching EPA's own 4 pCi/L point for recommending a fix. Nothing about a Zone 2 label lowers the case for testing in Madison County — EPA recommends it in every zone, moderate included.

Testing and mitigation in Madison County

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

Where Madison County's figures come from

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.