Coffee County, AL: EPA's radon zone, explained

EPA places Coffee County in Zone 3 - Low Potential — a predicted county-wide average indoor radon level below 2 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. That puts Coffee County in the 23rd percentile nationally for radon potential — higher than 23% of the counties EPA has rated.

Coffee County by the numbers

Coffee County, Alabama is home to about 56,358 people across 679.066 square miles. That works out to roughly 83 people per square mile. By population, Coffee County is the 313th largest of every county sharing its EPA zone — the 70th percentile by population within that zone. Coffee County falls in EPA Radon Region 4, one of 736 counties nationally EPA assigns to that same geologic province.

Why the zone isn't the answer by itself

At Zone 3, Coffee County's predicted county average is under the national indoor average (~1.3 pCi/L) and well below EPA's 4 pCi/L action level — outdoor air nationally runs about 0.4 pCi/L for comparison. Low doesn't mean zero: EPA's own data shows homes in Zone 3 counties like Coffee County testing above the action level often enough that skipping a test isn't the safe assumption.

If Coffee County tests above the action level

For a Coffee 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 Alabama's state radon program

For Coffee County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Coffee 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 Coffee 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. Whatever zone Coffee County carries, the zone explainer covers what it does and doesn't tell you about any one house.