Lawrence County, TN radon potential

Lawrence County is mapped as Zone 1 - Highest Potential by EPA — meaning the county-wide average indoor level is predicted above 4 pCi/L. Lawrence County sits at the 89th percentile nationally for radon potential — above 89 of every 100 rated counties.

How Lawrence County compares

Lawrence County, Tennessee is home to about 46,467 people across 617.13 square miles. That works out to roughly 75 people per square mile. Within its own EPA zone, Lawrence County is bigger by population than 69% of the counties that share it. Lawrence County falls in EPA Radon Region 4, one of 736 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

Where the national indoor average runs about 1.3 pCi/L, Lawrence County's Zone 1 rating puts its predicted county average above EPA's 4 pCi/L action level itself. That doesn't mean every Lawrence County house tests high — a zone is a county-wide prediction, never a single-home reading — but it's a reason to test sooner rather than let it wait.

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

Where Lawrence County's figures come from

The methodology guide shows exactly which EPA and Census sources feed Lawrence County's numbers. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.