Saguache County, CO: EPA's radon zone, explained

EPA places Saguache County in Zone 2 - Moderate Potential — a predicted county-wide average indoor radon level between 2 and 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Nationally that's the 37th percentile for radon potential — Saguache County outranks 37% of every county EPA has rated.

Where Saguache County sits nationally

Saguache County, Colorado is home to about 6,670 people across 3,168.566 square miles. Population density there runs about 2 people per square mile. By population, Saguache County is the 907th largest of every county sharing its EPA zone — the 12th percentile by population within that zone. EPA's geology-based Region 8 groups Saguache County with 290 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

Saguache County's Zone 2 prediction clears the 1.3 pCi/L national indoor average without reaching EPA's own 4 pCi/L point for recommending a fix. A Zone 2 rating is a moderate county-wide average, not a guarantee about any one house in Saguache County — testing is the only way to know an individual home's actual level.

Testing and mitigation in Saguache County

For a Saguache 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 Colorado's state radon program

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

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.