Is Weber County, UT a radon risk area?

EPA's own radon map rates Weber County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Weber County sits at the 63rd percentile nationally for radon potential — above 63 of every 100 rated counties.

Weber County by the numbers

About 276,118 people live in Weber County, Utah, spread over 611.023 square miles. Averaged across its land area, Weber County runs about 452 people per square mile. Rank 86 by population within its EPA zone puts Weber County at the 92nd percentile among zone peers. Geologically, Weber County is grouped into EPA Region 8 alongside 290 other counties that share its rock and soil setting.

What this actually means for a house in Weber County

Weber 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). Weber 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 Weber County

Nothing about Weber County's EPA zone changes the mitigation number: $800–$2,500 nationally (around $1,200 typical), set by the house's foundation rather than the county it sits in — and only relevant once a test actually clears 4 pCi/L.

Find Utah's state radon program

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

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. Whatever zone Weber County carries, the zone explainer covers what it does and doesn't tell you about any one house.