What EPA's radon map says about Catawba County

Catawba 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, Catawba County ranks higher in radon potential than 61% of rated counties (the 61st percentile).

Catawba County by the numbers

About 167,054 people live in Catawba County, North Carolina, spread over 401.375 square miles. Population density there runs about 416 people per square mile. Among counties sharing Catawba County's EPA zone, it outranks 87% of them by population. Geologically, Catawba County is grouped into EPA Region 4 alongside 735 other counties that share its rock and soil setting.

Zone vs. an actual test

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 Catawba County's Zone 2 prediction. Catawba County's Zone 2 rating sits in the middle nationally; EPA's guidance is unchanged by that — test every home regardless of its zone.

Next steps for a home in Catawba County

Mitigation cost doesn't depend on Catawba 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

Catawba County's test kit answers today; a Airthings radon monitor keeps answering for Catawba 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

Catawba County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.