What EPA's radon map says about Greenup County

EPA places Greenup County in Zone 2 - Moderate Potential — a predicted county-wide average indoor radon level between 2 and 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Nationally, Greenup County ranks higher in radon potential than 52% of rated counties (the 52nd percentile).

How Greenup County compares

About 35,273 people live in Greenup County, Kentucky, spread over 344.455 square miles. That works out to roughly 102 people per square mile. Among counties sharing Greenup County's EPA zone, it outranks 58% of them by population. Greenup County falls in EPA Radon Region 4, one of 736 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

Neither at the 4 pCi/L action level nor down at the roughly 1.3 pCi/L national indoor norm, Greenup County's Zone 2 prediction lands in the gap between the two. A Zone 2 rating is a moderate county-wide average, not a guarantee about any one house in Greenup County — testing is the only way to know an individual home's actual level.

Next steps for a home in Greenup County

Mitigation cost doesn't depend on Greenup County's zone — it depends on the house's foundation. A typical system runs $800–$2,500 (about $1,200 typical), and testing first is what tells you whether that's needed at all.

Find Kentucky's state radon program

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

More on how this number was built

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. Whatever zone Greenup County carries, the zone explainer covers what it does and doesn't tell you about any one house.