Crockett County, TN: EPA's radon zone, explained

EPA's own radon map rates Crockett County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Crockett County sits at the 10th percentile nationally for radon potential — above 10 of every 100 rated counties.

Where Crockett County sits nationally

Crockett County, Tennessee is home to about 13,973 people across 265.528 square miles. Population density there runs about 53 people per square mile. By population, Crockett County is the 731st largest of every county sharing its EPA zone — the 29th percentile by population within that zone. Geologically, Crockett County is grouped into EPA Region 4 alongside 735 other counties that share its rock and soil setting.

Zone vs. an actual test

Crockett County's Zone 3 prediction undercuts the roughly 1.3 pCi/L most US homes average, nowhere near EPA's 4 pCi/L threshold for recommending mitigation. Even at Zone 3, Crockett County homes are not guaranteed a low reading — zone is a county-wide average, and EPA recommends testing every home regardless of zone.

Next steps for a home in Crockett County

For a Crockett County homeowner, the order is simple: test first, since a kit costs a small fraction of what mitigation would. Only if the result clears 4 pCi/L does a system — typically $800–$2,500, about $1,200 for a common install — become worth pricing out.

Find Tennessee's state radon program

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

Where Crockett 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. Whatever zone Crockett County carries, the zone explainer covers what it does and doesn't tell you about any one house.