Moore County, NC: EPA's radon zone, explained

Moore County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Nationally, Moore County ranks higher in radon potential than 26% of rated counties (the 26th percentile).

Moore County by the numbers

Moore County, North Carolina is home to about 108,417 people across 697.627 square miles. Averaged across its land area, Moore County runs about 155 people per square mile. By population, Moore County is the 209th largest of every county sharing its EPA zone — the 80th percentile by population within that zone. EPA's geology-based Region 4 groups Moore County with 735 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

Well clear of both the 1.3 pCi/L national indoor average and EPA's 4 pCi/L action level, Moore County's Zone 3 prediction is the low end of the scale. A Zone 3 label describes Moore County's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

Testing and mitigation in Moore County

For a Moore County homeowner, the order is simple: test first, since a kit costs a small fraction of what mitigation would. Only if the result clears 4 pCi/L does a system — typically $800–$2,500, about $1,200 for a common install — become worth pricing out.

Find North Carolina's state radon program

For Moore County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Moore 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 Moore County's figures come from

Moore County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. Whatever zone Moore County carries, the zone explainer covers what it does and doesn't tell you about any one house.