Wheatland County, MT: EPA's radon zone, explained

Wheatland County is mapped as Zone 2 - Moderate Potential by EPA — meaning the county-wide average indoor level is predicted between 2 and 4 pCi/L. Wheatland County sits at the 34th percentile nationally for radon potential — above 34 of every 100 rated counties.

How Wheatland County compares

Wheatland County, Montana is home to about 2,058 people across 1,422.481 square miles. That works out to roughly 1 people per square mile. By population, Wheatland County is the 1001st largest of every county sharing its EPA zone — the 3rd percentile by population within that zone. Wheatland 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

Call it a middle case: above the 1.3 pCi/L most US homes average, below the 4 pCi/L line EPA uses to recommend mitigation — that's Wheatland County's Zone 2 prediction. Wheatland County's Zone 2 rating sits in the middle nationally; EPA's guidance is unchanged by that — test every home regardless of its zone.

If Wheatland County tests above the action level

For a Wheatland 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 Montana's state radon program

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

Wheatland 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.