Is Edgecombe County, NC a radon risk area?

Edgecombe 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 Edgecombe County in the 22nd percentile nationally for radon potential — higher than 22% of the counties EPA has rated.

Where Edgecombe County sits nationally

About 49,124 people live in Edgecombe County, North Carolina, spread over 505.436 square miles. Averaged across its land area, Edgecombe County runs about 97 people per square mile. Rank 350 by population within its EPA zone puts Edgecombe County at the 66th percentile among zone peers. Edgecombe County falls in EPA Radon Region 4, one of 736 counties nationally EPA assigns to that same geologic province.

Why the zone isn't the answer by itself

At Zone 3, Edgecombe County's predicted county average is under the national indoor average (~1.3 pCi/L) and well below EPA's 4 pCi/L action level — outdoor air nationally runs about 0.4 pCi/L for comparison. Low doesn't mean zero: EPA's own data shows homes in Zone 3 counties like Edgecombe County testing above the action level often enough that skipping a test isn't the safe assumption.

If Edgecombe County tests above the action level

Nothing about Edgecombe 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

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

More on how this number was built

Edgecombe County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.