Oconee County, SC radon potential

EPA's own radon map rates Oconee County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Rank it against the rest of the country and Oconee County lands in the 59th percentile for radon potential.

Where Oconee County sits nationally

Oconee County, South Carolina is home to about 82,475 people across 626.593 square miles. That works out to roughly 132 people per square mile. Within its own EPA zone, Oconee County is bigger by population than 78% of the counties that share it. Geologically, Oconee County is grouped into EPA Region 4 alongside 735 other counties that share its rock and soil setting.

Why the zone isn't the answer by itself

EPA's Zone 2 rating for Oconee County sits below its own 4 pCi/L action level but above the national indoor average of about 1.3 pCi/L. Nothing about a Zone 2 label lowers the case for testing in Oconee County — EPA recommends it in every zone, moderate included.

Next steps for a home in Oconee 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 Oconee County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Oconee County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. Use code RADONZONE-10OFF at checkout for 10% off.

Where Oconee County's figures come from

The methodology guide shows exactly which EPA and Census sources feed Oconee County's numbers. Whatever zone Oconee County carries, the zone explainer covers what it does and doesn't tell you about any one house.