Gunnison County, CO radon potential

EPA places Gunnison County in Zone 1 - Highest Potential — a predicted county-wide average indoor radon level above 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Rank it against the rest of the country and Gunnison County lands in the 81st percentile for radon potential.

Gunnison County by the numbers

Gunnison County, Colorado is home to about 17,310 people across 3,239.14 square miles. That works out to roughly 5 people per square mile. Within its own EPA zone, Gunnison County is bigger by population than 43% of the counties that share it. Gunnison County falls in EPA Radon Region 8, one of 291 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

Gunnison County's predicted average sits above EPA's own action level of 4 pCi/L — the concentration at which EPA recommends fixing a home — versus a national average around 1.3 pCi/L indoors and 0.4 pCi/L outdoors. Being in Zone 1 raises the odds Gunnison County homes test above the action level, but it does not mean any specific house does — EPA recommends every home be tested, in every zone, because the only way to know is to test.

Next steps for a home in Gunnison 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 Colorado's state radon program

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

Where Gunnison County's figures come from

The methodology guide shows exactly which EPA and Census sources feed Gunnison County's numbers. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.