Jasper County, SC radon potential

Jasper County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Jasper County sits at the 19th percentile nationally for radon potential — above 19 of every 100 rated counties.

Where Jasper County sits nationally

Jasper County, South Carolina is home to about 35,618 people across 655.135 square miles. Averaged across its land area, Jasper County runs about 54 people per square mile. Within its own EPA zone, Jasper County is bigger by population than 58% of the counties that share it. Geologically, Jasper County is grouped into EPA Region 4 alongside 735 other counties that share its rock and soil setting.

Zone vs. an actual test

Jasper County's Zone 3 prediction undercuts the roughly 1.3 pCi/L most US homes average, nowhere near EPA's 4 pCi/L threshold for recommending mitigation. A Zone 3 label describes Jasper County's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

Testing and mitigation in Jasper 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 Jasper County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Jasper 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 Jasper County's figures come from

Jasper County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.