Is Bamberg County, SC a radon risk area?

EPA places Bamberg 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. Bamberg County sits at the 9th percentile nationally for radon potential — above 9 of every 100 rated counties.

How Bamberg County compares

About 12,870 people live in Bamberg County, South Carolina, spread over 393.367 square miles. Averaged across its land area, Bamberg County runs about 33 people per square mile. Rank 754 by population within its EPA zone puts Bamberg County at the 27th percentile among zone peers. Bamberg County falls in EPA Radon Region 4, one of 736 counties nationally EPA assigns to that same geologic province.

What this actually means for a house in Bamberg County

Bamberg County's predicted average sits below the national indoor average of about 1.3 pCi/L, well under EPA's 4 pCi/L action level. Don't read Zone 3 as a pass for Bamberg County — EPA's guidance to test every home makes no exception for counties predicted low.

Next steps for a home in Bamberg County

Nothing about Bamberg 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

Bamberg County's test kit answers today; a Airthings radon monitor keeps answering for Bamberg 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 Bamberg County's numbers. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.