Trousdale County, TN radon potential

Trousdale County is mapped as Zone 1 - Highest Potential by EPA — meaning the county-wide average indoor level is predicted above 4 pCi/L. Nationally that's the 77th percentile for radon potential — Trousdale County outranks 77% of every county EPA has rated.

How Trousdale County compares

Trousdale County, Tennessee is home to about 12,159 people across 114.342 square miles. Population density there runs about 106 people per square mile. Within its own EPA zone, Trousdale County is bigger by population than 33% of the counties that share it. Geologically, Trousdale County is grouped into EPA Region 4 alongside 735 other counties that share its rock and soil setting.

What this actually means for a house in Trousdale County

Outdoor air nationally averages about 0.4 pCi/L, indoor air about 1.3 pCi/L — Trousdale County's Zone 1 prediction clears both of those and EPA's fix-it threshold besides. A Zone 1 rating means testing is worth doing sooner rather than later, but it is still county-wide average, not a reading for any single house — some homes in Trousdale County will test well under the action level, and EPA's guidance is to test regardless of zone.

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

Trousdale County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.