Hampton County, SC radon potential

EPA places Hampton 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. Rank it against the rest of the country and Hampton County lands in the 12th percentile for radon potential.

Hampton County by the numbers

Hampton County, South Carolina is home to about 18,172 people across 559.975 square miles. That works out to roughly 32 people per square mile. Within its own EPA zone, Hampton County is bigger by population than 36% of the counties that share it. Geologically, Hampton 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, Hampton County's Zone 3 prediction is the low end of the scale. Don't read Zone 3 as a pass for Hampton County — EPA's guidance to test every home makes no exception for counties predicted low.

Testing and mitigation in Hampton County

A short-term test kit is the standard first step and typically costs far less than mitigation itself. If a test comes back at or above 4 pCi/L, a radon mitigation system for a typical home runs roughly $800–$2,500 (around $1,200 for a common single-family install), driven mainly by foundation type, not by county.

Find South Carolina's state radon program

For Hampton County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Hampton County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. RADONZONE-10OFF at checkout knocks 10% off.

Where Hampton County's figures come from

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