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

Randolph 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. Randolph County sits at the 47th percentile nationally for radon potential — above 47 of every 100 rated counties.

Where Randolph County sits nationally

Randolph County, Alabama is home to about 23,067 people across 580.55 square miles. Population density there runs about 40 people per square mile. By population, Randolph County is the 578th largest of every county sharing its EPA zone — the 44th percentile by population within that zone. Randolph County falls in EPA Radon Region 4, one of 736 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

Randolph 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 Randolph County — EPA recommends it in every zone, moderate included.

Testing and mitigation in Randolph County

For a Randolph 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 Randolph County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Randolph 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 Randolph 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. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.