Is Sumter County, GA a radon risk area?

EPA's own radon map rates Sumter County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Nationally, Sumter County ranks higher in radon potential than 17% of rated counties (the 17th percentile).

Sumter County by the numbers

About 28,972 people live in Sumter County, Georgia, spread over 482.877 square miles. Averaged across its land area, Sumter County runs about 60 people per square mile. Rank 495 by population within its EPA zone puts Sumter County at the 52nd percentile among zone peers. EPA's geology-based Region 4 groups Sumter County with 735 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Well clear of both the 1.3 pCi/L national indoor average and EPA's 4 pCi/L action level, Sumter County's Zone 3 prediction is the low end of the scale. Low doesn't mean zero: EPA's own data shows homes in Zone 3 counties like Sumter County testing above the action level often enough that skipping a test isn't the safe assumption.

Testing and mitigation in Sumter County

Nothing about Sumter 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

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

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. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.