Is Morgan County, TN a radon risk area?

Morgan County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Morgan County sits at the 14th percentile nationally for radon potential — above 14 of every 100 rated counties.

How Morgan County compares

About 21,954 people live in Morgan County, Tennessee, spread over 522.18 square miles. That works out to roughly 42 people per square mile. Rank 579 by population within its EPA zone puts Morgan County at the 44th percentile among zone peers. Geologically, Morgan County is grouped into EPA Region 4 alongside 735 other counties that share its rock and soil setting.

Why the zone isn't the answer by itself

Well clear of both the 1.3 pCi/L national indoor average and EPA's 4 pCi/L action level, Morgan County's Zone 3 prediction is the low end of the scale. A Zone 3 label describes Morgan County's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

If Morgan County tests above the action level

Nothing about Morgan County's EPA zone changes the mitigation number: $800–$2,500 nationally (around $1,200 typical), set by the house's foundation rather than the county it sits in — and only relevant once a test actually clears 4 pCi/L.

Find Tennessee's state radon program

Morgan County's test kit answers today; a Airthings radon monitor keeps answering for Morgan County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. RADONZONE-10OFF at checkout knocks 10% off.

More on how this number was built

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