What EPA's radon map says about Laurens County

EPA's own radon map rates Laurens 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 Laurens County lands in the 58th percentile for radon potential.

Laurens County by the numbers

About 70,545 people live in Laurens County, South Carolina, spread over 712.874 square miles. Population density there runs about 99 people per square mile. Among counties sharing Laurens County's EPA zone, it outranks 75% of them by population. Geologically, Laurens 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 Laurens County sits below its own 4 pCi/L action level but above the national indoor average of about 1.3 pCi/L. A Zone 2 rating is a moderate county-wide average, not a guarantee about any one house in Laurens County — testing is the only way to know an individual home's actual level.

If Laurens County tests above the action level

Mitigation cost doesn't depend on Laurens County's zone — it depends on the house's foundation. A typical system runs $800–$2,500 (about $1,200 typical), and testing first is what tells you whether that's needed at all.

Find South Carolina's state radon program

Laurens County's test kit answers today; a Airthings radon monitor keeps answering for Laurens County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. Code RADONZONE-10OFF takes 10% off at checkout.

More on how this number was built

Laurens County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. Whatever zone Laurens County carries, the zone explainer covers what it does and doesn't tell you about any one house.