What EPA's radon map says about Fulton County

EPA places Fulton 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. Fulton County sits at the 4th percentile nationally for radon potential — above 4 of every 100 rated counties.

Where Fulton County sits nationally

About 6,282 people live in Fulton County, Kentucky, spread over 205.932 square miles. That works out to roughly 31 people per square mile. Among counties sharing Fulton County's EPA zone, it outranks 11% of them by population. EPA's geology-based Region 4 groups Fulton County with 735 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

At Zone 3, Fulton County's predicted county average is under the national indoor average (~1.3 pCi/L) and well below EPA's 4 pCi/L action level — outdoor air nationally runs about 0.4 pCi/L for comparison. Even at Zone 3, Fulton County homes are not guaranteed a low reading — zone is a county-wide average, and EPA recommends testing every home regardless of zone.

Testing and mitigation in Fulton County

Mitigation cost doesn't depend on Fulton 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

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

Fulton 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.