Moffat County, CO radon potential

EPA's own radon map rates Moffat County zone 1 - highest potential, predicting a county-wide average indoor level above 4 pCi/L. Nationally that's the 78th percentile for radon potential — Moffat County outranks 78% of every county EPA has rated.

Moffat County by the numbers

Moffat County, Colorado is home to about 13,142 people across 4,743.244 square miles. Population density there runs about 3 people per square mile. Within its own EPA zone, Moffat County is bigger by population than 34% of the counties that share it. Moffat 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

Where the national indoor average runs about 1.3 pCi/L, Moffat County's Zone 1 rating puts its predicted county average above EPA's 4 pCi/L action level itself. That doesn't mean every Moffat County house tests high — a zone is a county-wide prediction, never a single-home reading — but it's a reason to test sooner rather than let it wait.

If Moffat County tests above the action level

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

Moffat County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.