Hertford County, NC radon potential

Hertford 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 Hertford County in the 13th percentile nationally for radon potential — higher than 13% of the counties EPA has rated.

Hertford County by the numbers

Hertford County, North Carolina is home to about 19,169 people across 353.164 square miles. That works out to roughly 54 people per square mile. Within its own EPA zone, Hertford County is bigger by population than 38% of the counties that share it. EPA's geology-based Region 4 groups Hertford County with 735 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

A Zone 3 county like Hertford County is predicted closer to the 0.4 pCi/L typical outdoors than to EPA's 4 pCi/L action level. Low doesn't mean zero: EPA's own data shows homes in Zone 3 counties like Hertford County testing above the action level often enough that skipping a test isn't the safe assumption.

Testing and mitigation in Hertford 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 Hertford County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Hertford 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 Hertford County's figures come from

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. Whatever zone Hertford County carries, the zone explainer covers what it does and doesn't tell you about any one house.