What EPA's radon map says about Iredell County

Iredell 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. Rank it against the rest of the country and Iredell County lands in the 62nd percentile for radon potential.

How Iredell County compares

About 206,361 people live in Iredell County, North Carolina, spread over 574.471 square miles. Population density there runs about 359 people per square mile. Among counties sharing Iredell County's EPA zone, it outranks 89% of them by population. EPA's geology-based Region 4 groups Iredell County with 735 other counties nationally sharing its underlying rock and soil profile.

What this actually means for a house in Iredell County

Iredell County's Zone 2 prediction clears the 1.3 pCi/L national indoor average without reaching EPA's own 4 pCi/L point for recommending a fix. Middle-of-the-pack doesn't mean risk-free for any one Iredell County address — a moderate county average still leaves individual homes to test either side of it.

If Iredell County tests above the action level

Mitigation cost doesn't depend on Iredell 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

Iredell County's test kit answers today; a Airthings radon monitor keeps answering for Iredell County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. Code RADONZONE-10OFF takes 10% off at checkout.

More on how this number was built

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