What EPA's radon map says about Vance County

Vance County is mapped as Zone 2 - Moderate Potential by EPA — meaning the county-wide average indoor level is predicted between 2 and 4 pCi/L. Nationally that's the 54th percentile for radon potential — Vance County outranks 54% of every county EPA has rated.

Where Vance County sits nationally

About 42,337 people live in Vance County, North Carolina, spread over 252.401 square miles. Averaged across its land area, Vance County runs about 168 people per square mile. Among counties sharing Vance County's EPA zone, it outranks 63% of them by population. EPA's geology-based Region 4 groups Vance County with 735 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Call it a middle case: above the 1.3 pCi/L most US homes average, below the 4 pCi/L line EPA uses to recommend mitigation — that's Vance County's Zone 2 prediction. Middle-of-the-pack doesn't mean risk-free for any one Vance County address — a moderate county average still leaves individual homes to test either side of it.

If Vance County tests above the action level

Mitigation cost doesn't depend on Vance County's zone — it depends on the house's foundation. A typical system runs $800–$2,500 (about $1,200 typical), and testing first is what tells you whether that's needed at all.

Find North Carolina's state radon program

Vance County's test kit answers today; a Airthings radon monitor keeps answering for Vance 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. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.