Daniels County, MT radon potential

EPA's own radon map rates Daniels County zone 1 - highest potential, predicting a county-wide average indoor level above 4 pCi/L. Nationally that's the 67th percentile for radon potential — Daniels County outranks 67% of every county EPA has rated.

Where Daniels County sits nationally

Daniels County, Montana is home to about 1,625 people across 1,426.27 square miles. Averaged across its land area, Daniels County runs about 1 people per square mile. Within its own EPA zone, Daniels County is bigger by population than 2% of the counties that share it. Daniels County falls in EPA Radon Region 8, one of 291 counties nationally EPA assigns to that same geologic province.

What this actually means for a house in Daniels County

Where the national indoor average runs about 1.3 pCi/L, Daniels County's Zone 1 rating puts its predicted county average above EPA's 4 pCi/L action level itself. Some Daniels County homes will test comfortably under the action level despite the county's Zone 1 rating — the only way to know which kind of home you have is an actual test.

Next steps for a home in Daniels 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 Montana's state radon program

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

Where Daniels County's figures come from

Daniels 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.