Overton County, TN radon potential

Overton 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. Nationally, Overton County ranks higher in radon potential than 48% of rated counties (the 48th percentile).

Overton County by the numbers

Overton County, Tennessee is home to about 23,551 people across 433.488 square miles. Population density there runs about 54 people per square mile. Within its own EPA zone, Overton County is bigger by population than 45% of the counties that share it. EPA's geology-based Region 4 groups Overton County with 735 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

EPA's Zone 2 rating for Overton County sits below its own 4 pCi/L action level but above the national indoor average of about 1.3 pCi/L. A Zone 2 rating is a moderate county-wide average, not a guarantee about any one house in Overton County — testing is the only way to know an individual home's actual level.

If Overton 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 Tennessee's state radon program

For Overton County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Overton 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 Overton 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. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.