Wilson County, NC radon potential

EPA places Wilson County in Zone 3 - Low Potential — a predicted county-wide average indoor radon level below 2 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Nationally that's the 25th percentile for radon potential — Wilson County outranks 25% of every county EPA has rated.

How Wilson County compares

Wilson County, North Carolina is home to about 79,958 people across 367.574 square miles. Population density there runs about 218 people per square mile. Within its own EPA zone, Wilson County is bigger by population than 76% of the counties that share it. Wilson County falls in EPA Radon Region 4, one of 736 counties nationally EPA assigns to that same geologic province.

What this actually means for a house in Wilson County

At Zone 3, Wilson 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. A Zone 3 rating means Wilson County's county-wide average is predicted low, but EPA is explicit that a meaningful share of homes in low-potential zones still test above the action level — a low zone is not a reason to skip testing.

Next steps for a home in Wilson County

A short-term test kit is the standard first step and typically costs far less than mitigation itself. If a test comes back at or above 4 pCi/L, a radon mitigation system for a typical home runs roughly $800–$2,500 (around $1,200 for a common single-family install), driven mainly by foundation type, not by county.

Find North Carolina's state radon program

For Wilson County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Wilson County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. Use code RADONZONE-10OFF at checkout for 10% off.

Where Wilson County's figures come from

The methodology guide shows exactly which EPA and Census sources feed Wilson County's numbers. Whatever zone Wilson County carries, the zone explainer covers what it does and doesn't tell you about any one house.