Box Elder County, UT radon potential

EPA's own radon map rates Box Elder County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. That puts Box Elder County in the 57th percentile nationally for radon potential — higher than 57% of the counties EPA has rated.

How Box Elder County compares

Box Elder County, Utah is home to about 64,120 people across 5,781.304 square miles. Population density there runs about 11 people per square mile. Within its own EPA zone, Box Elder County is bigger by population than 72% of the counties that share it. Box Elder County falls in EPA Radon Region 8, one of 291 counties nationally EPA assigns to that same geologic province.

What this actually means for a house in Box Elder County

Neither at the 4 pCi/L action level nor down at the roughly 1.3 pCi/L national indoor norm, Box Elder County's Zone 2 prediction lands in the gap between the two. Nothing about a Zone 2 label lowers the case for testing in Box Elder County — EPA recommends it in every zone, moderate included.

Next steps for a home in Box Elder County

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

Where Box Elder County's figures come from

The methodology guide shows exactly which EPA and Census sources feed Box Elder County's numbers. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.