Is Cherokee County, SC a radon risk area?

EPA's own radon map rates Cherokee County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Nationally that's the 56th percentile for radon potential — Cherokee County outranks 56% of every county EPA has rated.

How Cherokee County compares

About 57,770 people live in Cherokee County, South Carolina, spread over 392.967 square miles. That works out to roughly 147 people per square mile. Rank 313 by population within its EPA zone puts Cherokee County at the 70th percentile among zone peers. EPA's geology-based Region 4 groups Cherokee County with 735 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Neither at the 4 pCi/L action level nor down at the roughly 1.3 pCi/L national indoor norm, Cherokee County's Zone 2 prediction lands in the gap between the two. A Zone 2 rating is a moderate county-wide average, not a guarantee about any one house in Cherokee County — testing is the only way to know an individual home's actual level.

Next steps for a home in Cherokee County

Nothing about Cherokee 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

Cherokee County's test kit answers today; a Airthings radon monitor keeps answering for Cherokee 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

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.