Archuleta County, CO radon potential

EPA's own radon map rates Archuleta County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Nationally, Archuleta County ranks higher in radon potential than 43% of rated counties (the 43rd percentile).

Archuleta County by the numbers

Archuleta County, Colorado is home to about 14,112 people across 1,350.089 square miles. Averaged across its land area, Archuleta County runs about 10 people per square mile. Within its own EPA zone, Archuleta County is bigger by population than 29% of the counties that share it. EPA's geology-based Region 8 groups Archuleta County with 290 other counties nationally sharing its underlying rock and soil profile.

What this actually means for a house in Archuleta County

EPA's Zone 2 rating for Archuleta County sits below its own 4 pCi/L action level but above the national indoor average of about 1.3 pCi/L. A county-wide moderate average, like Archuleta County's, can still hide a specific house well above or below it — testing is what actually answers the question.

Next steps for a home in Archuleta 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 Archuleta County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Archuleta County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. RADONZONE-10OFF at checkout knocks 10% off.

Where Archuleta County's figures come from

Archuleta County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.