Pueblo County, CO radon potential
EPA's own radon map rates Pueblo County zone 1 - highest potential, predicting a county-wide average indoor level above 4 pCi/L. Pueblo County sits at the 96th percentile nationally for radon potential — above 96 of every 100 rated counties.
Pueblo County by the numbers
Pueblo County, Colorado is home to about 169,866 people across 2,386.552 square miles. Averaged across its land area, Pueblo County runs about 71 people per square mile. Within its own EPA zone, Pueblo County is bigger by population than 89% of the counties that share it. EPA's geology-based Region 8 groups Pueblo County with 290 other counties nationally sharing its underlying rock and soil profile.
Zone vs. an actual test
Outdoor air nationally averages about 0.4 pCi/L, indoor air about 1.3 pCi/L — Pueblo County's Zone 1 prediction clears both of those and EPA's fix-it threshold besides. 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 Pueblo County will test well under the action level, and EPA's guidance is to test regardless of zone.
Next steps for a home in Pueblo 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 Pueblo County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Pueblo 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 Pueblo County's figures come from
The methodology guide shows exactly which EPA and Census sources feed Pueblo County's numbers. Whatever zone Pueblo County carries, the zone explainer covers what it does and doesn't tell you about any one house.