Is Greene County, GA a radon risk area?

EPA's own radon map rates Greene County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Greene County sits at the 47th percentile nationally for radon potential — above 47 of every 100 rated counties.

How Greene County compares

About 21,091 people live in Greene County, Georgia, spread over 387.517 square miles. That works out to roughly 54 people per square mile. Rank 606 by population within its EPA zone puts Greene County at the 41st percentile among zone peers. Geologically, Greene 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 Greene County

Neither at the 4 pCi/L action level nor down at the roughly 1.3 pCi/L national indoor norm, Greene County's Zone 2 prediction lands in the gap between the two. A county-wide moderate average, like Greene County's, can still hide a specific house well above or below it — testing is what actually answers the question.

If Greene County tests above the action level

Nothing about Greene 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 Georgia's state radon program

Greene County's test kit answers today; a Airthings radon monitor keeps answering for Greene County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. Use code RADONZONE-10OFF at checkout for 10% off.

More on how this number was built

Greene County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. Whatever zone Greene County carries, the zone explainer covers what it does and doesn't tell you about any one house.