Is Abbeville County, SC a radon risk area?

EPA's own radon map rates Abbeville County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Abbeville County sits at the 48th percentile nationally for radon potential — above 48 of every 100 rated counties.

Where Abbeville County sits nationally

About 24,607 people live in Abbeville County, South Carolina, spread over 491.195 square miles. That works out to roughly 50 people per square mile. Rank 557 by population within its EPA zone puts Abbeville County at the 46th percentile among zone peers. Abbeville County falls in EPA Radon Region 4, one of 736 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

Abbeville 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). Nothing about a Zone 2 label lowers the case for testing in Abbeville County — EPA recommends it in every zone, moderate included.

Next steps for a home in Abbeville County

Nothing about Abbeville 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 South Carolina's state radon program

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

The methodology guide shows exactly which EPA and Census sources feed Abbeville County's numbers. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.