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

EPA's own radon map rates Union County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Nationally that's the 50th percentile for radon potential — Union County outranks 50% of every county EPA has rated.

Where Union County sits nationally

Union County, Georgia is home to about 27,601 people across 323.592 square miles. Averaged across its land area, Union County runs about 85 people per square mile. By population, Union County is the 512th largest of every county sharing its EPA zone — the 50th percentile by population within that zone. Union County falls in EPA Radon Region 4, one of 736 counties nationally EPA assigns to that same geologic province.

Why the zone isn't the answer by itself

Neither at the 4 pCi/L action level nor down at the roughly 1.3 pCi/L national indoor norm, Union County's Zone 2 prediction lands in the gap between the two. A Zone 2 rating is a moderate county-wide average, not a guarantee about any one house in Union County — testing is the only way to know an individual home's actual level.

Next steps for a home in Union County

For a Union 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 Union County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Union 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 Union 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 Union County carries, the zone explainer covers what it does and doesn't tell you about any one house.