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

Tallapoosa County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Rank it against the rest of the country and Tallapoosa County lands in the 20th percentile for radon potential.

Tallapoosa County by the numbers

Tallapoosa County, Alabama is home to about 40,699 people across 716.539 square miles. Averaged across its land area, Tallapoosa County runs about 57 people per square mile. By population, Tallapoosa County is the 401st largest of every county sharing its EPA zone — the 61st percentile by population within that zone. EPA's geology-based Region 4 groups Tallapoosa County with 735 other counties nationally sharing its underlying rock and soil profile.

What this actually means for a house in Tallapoosa County

Tallapoosa County's Zone 3 prediction undercuts the roughly 1.3 pCi/L most US homes average, nowhere near EPA's 4 pCi/L threshold for recommending mitigation. A Zone 3 label describes Tallapoosa County's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

If Tallapoosa County tests above the action level

For a Tallapoosa 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 Tallapoosa County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Tallapoosa 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 Tallapoosa 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.