Utah County, UT: EPA's radon zone, explained

EPA's own radon map rates Utah County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Nationally that's the 65th percentile for radon potential — Utah County outranks 65% of every county EPA has rated.

How Utah County compares

Utah County, Utah is home to about 747,234 people across 2,004.46 square miles. That works out to roughly 373 people per square mile. By population, Utah County is the 29th largest of every county sharing its EPA zone — the 97th percentile by population within that zone. Geologically, Utah County is grouped into EPA Region 8 alongside 290 other counties that share its rock and soil setting.

Zone vs. an actual test

EPA's Zone 2 rating for Utah County sits below its own 4 pCi/L action level but above the national indoor average of about 1.3 pCi/L. Utah 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 Utah County tests above the action level

For a Utah 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 Utah's state radon program

For Utah County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Utah County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. RADONZONE-10OFF at checkout knocks 10% off.

Where Utah County's figures come from

Utah County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.