Iron County, UT radon potential

Iron 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 57th percentile for radon potential — Iron County outranks 57% of every county EPA has rated.

Where Iron County sits nationally

Iron County, Utah is home to about 65,936 people across 3,296.167 square miles. Averaged across its land area, Iron County runs about 20 people per square mile. Within its own EPA zone, Iron County is bigger by population than 73% of the counties that share it. EPA's geology-based Region 8 groups Iron County with 290 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

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

If Iron County tests above the action level

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 Utah's state radon program

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

Iron 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.