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

EPA places Clay County in Zone 3 - Low Potential — a predicted county-wide average indoor radon level below 2 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Rank it against the rest of the country and Clay County lands in the 2nd percentile for radon potential.

Clay County by the numbers

Clay County, Georgia is home to about 2,815 people across 195.404 square miles. That works out to roughly 14 people per square mile. By population, Clay County is the 983rd largest of every county sharing its EPA zone — the 5th percentile by population within that zone. Clay County falls in EPA Radon Region 4, one of 736 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

A Zone 3 county like Clay County is predicted closer to the 0.4 pCi/L typical outdoors than to EPA's 4 pCi/L action level. A Zone 3 label describes Clay County's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

If Clay County tests above the action level

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

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