Uinta County, WY: EPA's radon zone, explained

Uinta County is mapped as Zone 1 - Highest Potential by EPA — meaning the county-wide average indoor level is predicted above 4 pCi/L. Nationally, Uinta County ranks higher in radon potential than 82% of rated counties (the 82nd percentile).

Uinta County by the numbers

Uinta County, Wyoming is home to about 20,621 people across 2,081.726 square miles. Population density there runs about 10 people per square mile. By population, Uinta County is the 567th largest of every county sharing its EPA zone — the 47th percentile by population within that zone. Uinta County falls in EPA Radon Region 8, one of 291 counties nationally EPA assigns to that same geologic province.

Why the zone isn't the answer by itself

Fixing a home becomes an EPA recommendation past 4 pCi/L, and that is precisely the side of the line Uinta County's Zone 1 prediction lands on, well above the roughly 1.3 pCi/L most US homes average. A Zone 1 rating means testing is worth doing sooner rather than later, but it is still county-wide average, not a reading for any single house — some homes in Uinta County will test well under the action level, and EPA's guidance is to test regardless of zone.

If Uinta County tests above the action level

For a Uinta 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 Wyoming's state radon program

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

Uinta County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. Whatever zone Uinta County carries, the zone explainer covers what it does and doesn't tell you about any one house.