What EPA's radon map says about Henry County

EPA places Henry County in Zone 2 - Moderate Potential — a predicted county-wide average indoor radon level between 2 and 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Henry County sits at the 63rd percentile nationally for radon potential — above 63 of every 100 rated counties.

Henry County by the numbers

About 259,315 people live in Henry County, Georgia, spread over 318.715 square miles. Averaged across its land area, Henry County runs about 814 people per square mile. Among counties sharing Henry County's EPA zone, it outranks 91% of them by population. Geologically, Henry 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 Henry County

Henry County's predicted average falls between EPA's 4 pCi/L action level and the national indoor average of about 1.3 pCi/L (outdoor air runs roughly 0.4 pCi/L). A Zone 2 rating is a moderate county-wide average, not a guarantee about any one house in Henry County — testing is the only way to know an individual home's actual level.

Next steps for a home in Henry County

Mitigation cost doesn't depend on Henry 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

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

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. Whatever zone Henry County carries, the zone explainer covers what it does and doesn't tell you about any one house.