Is Perquimans County, NC a radon risk area?

Perquimans County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Perquimans County sits at the 9th percentile nationally for radon potential — above 9 of every 100 rated counties.

Perquimans County by the numbers

About 13,460 people live in Perquimans County, North Carolina, spread over 247.176 square miles. Averaged across its land area, Perquimans County runs about 54 people per square mile. Rank 742 by population within its EPA zone puts Perquimans County at the 28th percentile among zone peers. EPA's geology-based Region 4 groups Perquimans County with 735 other counties nationally sharing its underlying rock and soil profile.

What this actually means for a house in Perquimans County

Perquimans County's predicted average sits below the national indoor average of about 1.3 pCi/L, well under EPA's 4 pCi/L action level. Don't read Zone 3 as a pass for Perquimans County — EPA's guidance to test every home makes no exception for counties predicted low.

If Perquimans County tests above the action level

Nothing about Perquimans 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

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

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.