Is Stewart County, GA a radon risk area?

EPA places Stewart 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. Nationally that's the 3rd percentile for radon potential — Stewart County outranks 3% of every county EPA has rated.

Stewart County by the numbers

About 4,809 people live in Stewart County, Georgia, spread over 458.766 square miles. That works out to roughly 10 people per square mile. Rank 945 by population within its EPA zone puts Stewart County at the 8th percentile among zone peers. Geologically, Stewart County is grouped into EPA Region 4 alongside 735 other counties that share its rock and soil setting.

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, Stewart County's Zone 3 prediction is the low end of the scale. Don't read Zone 3 as a pass for Stewart County — EPA's guidance to test every home makes no exception for counties predicted low.

Testing and mitigation in Stewart County

Nothing about Stewart 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

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

Stewart County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.