Hickman County, KY: EPA's radon zone, explained
EPA places Hickman County in Zone 3 - Low Potential — a predicted county-wide average indoor radon level below 2 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. That puts Hickman County in the 2nd percentile nationally for radon potential — higher than 2% of the counties EPA has rated.
How Hickman County compares
Hickman County, Kentucky is home to about 4,393 people across 242.331 square miles. That works out to roughly 18 people per square mile. By population, Hickman County is the 958th largest of every county sharing its EPA zone — the 7th percentile by population within that zone. EPA's geology-based Region 4 groups Hickman County with 735 other counties nationally sharing its underlying rock and soil profile.
Zone vs. an actual test
A Zone 3 county like Hickman County is predicted closer to the 0.4 pCi/L typical outdoors than to EPA's 4 pCi/L action level. A Zone 3 rating means Hickman County's county-wide average is predicted low, but EPA is explicit that a meaningful share of homes in low-potential zones still test above the action level — a low zone is not a reason to skip testing.
Next steps for a home in Hickman County
For a Hickman 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 Kentucky's state radon program
For Hickman County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Hickman 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 Hickman 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. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.