What EPA's radon map says about Wasatch County

EPA's own radon map rates Wasatch County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Rank it against the rest of the country and Wasatch County lands in the 53rd percentile for radon potential.

Wasatch County by the numbers

About 37,858 people live in Wasatch County, Utah, spread over 1,176.952 square miles. Population density there runs about 32 people per square mile. Among counties sharing Wasatch County's EPA zone, it outranks 60% of them by population. Geologically, Wasatch County is grouped into EPA Region 8 alongside 290 other counties that share its rock and soil setting.

Why the zone isn't the answer by itself

Wasatch County's predicted average falls between EPA's 4 pCi/L action level and the national indoor average of about 1.3 pCi/L (outdoor air runs roughly 0.4 pCi/L). A Zone 2 rating is a moderate county-wide average, not a guarantee about any one house in Wasatch County — testing is the only way to know an individual home's actual level.

Testing and mitigation in Wasatch County

Mitigation cost doesn't depend on Wasatch 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 Utah's state radon program

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

More on how this number was built

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