What EPA's radon map says about Floyd County

EPA places Floyd 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. Rank it against the rest of the country and Floyd County lands in the 52nd percentile for radon potential.

Floyd County by the numbers

About 34,532 people live in Floyd County, Kentucky, spread over 393.301 square miles. Population density there runs about 88 people per square mile. Among counties sharing Floyd County's EPA zone, it outranks 57% of them by population. EPA's geology-based Region 4 groups Floyd County with 735 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Call it a middle case: above the 1.3 pCi/L most US homes average, below the 4 pCi/L line EPA uses to recommend mitigation — that's Floyd County's Zone 2 prediction. Floyd County's Zone 2 rating sits in the middle nationally; EPA's guidance is unchanged by that — test every home regardless of its zone.

If Floyd County tests above the action level

Mitigation cost doesn't depend on Floyd 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

Floyd County's test kit answers today; a Airthings radon monitor keeps answering for Floyd 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

Floyd County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.