Loudon County, TN radon potential

Loudon County is mapped as Zone 1 - Highest Potential by EPA — meaning the county-wide average indoor level is predicted above 4 pCi/L. Nationally, Loudon County ranks higher in radon potential than 91% of rated counties (the 91st percentile).

How Loudon County compares

Loudon County, Tennessee is home to about 62,129 people across 229.272 square miles. Averaged across its land area, Loudon County runs about 271 people per square mile. Within its own EPA zone, Loudon County is bigger by population than 75% of the counties that share it. Loudon County falls in EPA Radon Region 4, one of 736 counties nationally EPA assigns to that same geologic province.

What this actually means for a house in Loudon County

Fixing a home becomes an EPA recommendation past 4 pCi/L, and that is precisely the side of the line Loudon County's Zone 1 prediction lands on, well above the roughly 1.3 pCi/L most US homes average. EPA's guidance doesn't change because of a Zone 1 label: test the house. What changes is the reason to not put it off in Loudon County specifically.

Testing and mitigation in Loudon 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 Loudon County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Loudon 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 Loudon County's figures come from

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