What EPA's radon map says about Decatur County

EPA's own radon map rates Decatur County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Rank it against the rest of the country and Decatur County lands in the 17th percentile for radon potential.

How Decatur County compares

About 29,391 people live in Decatur County, Georgia, spread over 597.239 square miles. That works out to roughly 49 people per square mile. Among counties sharing Decatur County's EPA zone, it outranks 53% of them by population. EPA's geology-based Region 4 groups Decatur County with 735 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

Well clear of both the 1.3 pCi/L national indoor average and EPA's 4 pCi/L action level, Decatur County's Zone 3 prediction is the low end of the scale. Even at Zone 3, Decatur County homes are not guaranteed a low reading — zone is a county-wide average, and EPA recommends testing every home regardless of zone.

Next steps for a home in Decatur County

Mitigation cost doesn't depend on Decatur 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 Georgia's state radon program

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

The methodology guide shows exactly which EPA and Census sources feed Decatur County's numbers. Whatever zone Decatur County carries, the zone explainer covers what it does and doesn't tell you about any one house.