Carter County, TN radon potential

EPA's own radon map rates Carter County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Rank it against the rest of the country and Carter County lands in the 56th percentile for radon potential.

How Carter County compares

Carter County, Tennessee is home to about 57,434 people across 341.288 square miles. Population density there runs about 168 people per square mile. Within its own EPA zone, Carter County is bigger by population than 69% of the counties that share it. Geologically, Carter 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 Carter County

Carter County's Zone 2 prediction clears the 1.3 pCi/L national indoor average without reaching EPA's own 4 pCi/L point for recommending a fix. A Zone 2 rating is a moderate county-wide average, not a guarantee about any one house in Carter County — testing is the only way to know an individual home's actual level.

Next steps for a home in Carter 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 Carter County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Carter 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 Carter County's figures come from

Carter County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. Whatever zone Carter County carries, the zone explainer covers what it does and doesn't tell you about any one house.