Is Cabarrus County, NC a radon risk area?

Cabarrus County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. That puts Cabarrus County in the 30th percentile nationally for radon potential — higher than 30% of the counties EPA has rated.

How Cabarrus County compares

About 244,925 people live in Cabarrus County, North Carolina, spread over 361.246 square miles. Averaged across its land area, Cabarrus County runs about 678 people per square mile. Rank 107 by population within its EPA zone puts Cabarrus County at the 90th percentile among zone peers. Geologically, Cabarrus County is grouped into EPA Region 4 alongside 735 other counties that share its rock and soil setting.

Zone vs. an actual test

Cabarrus 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 Cabarrus County's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

Next steps for a home in Cabarrus County

Nothing about Cabarrus 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 North Carolina's state radon program

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

More on how this number was built

Cabarrus 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.