DeKalb County, TN radon potential

EPA places DeKalb 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. Nationally, DeKalb County ranks higher in radon potential than 47% of rated counties (the 47th percentile).

Where DeKalb County sits nationally

DeKalb County, Tennessee is home to about 21,747 people across 304.432 square miles. Population density there runs about 71 people per square mile. Within its own EPA zone, DeKalb County is bigger by population than 42% of the counties that share it. Geologically, DeKalb 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

Neither at the 4 pCi/L action level nor down at the roughly 1.3 pCi/L national indoor norm, DeKalb County's Zone 2 prediction lands in the gap between the two. A Zone 2 rating is a moderate county-wide average, not a guarantee about any one house in DeKalb County — testing is the only way to know an individual home's actual level.

Testing and mitigation in DeKalb County

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 Tennessee's state radon program

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

Where DeKalb County's figures come from

The methodology guide shows exactly which EPA and Census sources feed DeKalb County's numbers. Whatever zone DeKalb County carries, the zone explainer covers what it does and doesn't tell you about any one house.