Cullman County, AL radon potential

EPA places Cullman 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. Rank it against the rest of the country and Cullman County lands in the 59th percentile for radon potential.

How Cullman County compares

Cullman County, Alabama is home to about 92,604 people across 734.749 square miles. That works out to roughly 126 people per square mile. Within its own EPA zone, Cullman County is bigger by population than 79% of the counties that share it. Geologically, Cullman County is grouped into EPA Region 4 alongside 735 other counties that share its rock and soil setting.

Why the zone isn't the answer by itself

Cullman 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. Nothing about a Zone 2 label lowers the case for testing in Cullman County — EPA recommends it in every zone, moderate included.

If Cullman 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 Alabama's state radon program

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

Where Cullman County's figures come from

Cullman County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. Whatever zone Cullman County carries, the zone explainer covers what it does and doesn't tell you about any one house.