Fulton County, NY: EPA's radon zone, explained

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. Nationally that's the 22nd percentile for radon potential — Fulton County outranks 22% of every county EPA has rated.

How Fulton County compares

Fulton County, New York is home to about 52,073 people across 495.46 square miles. Population density there runs about 105 people per square mile. By population, Fulton County is the 331st largest of every county sharing its EPA zone — the 68th percentile by population within that zone. Geologically, Fulton County is grouped into EPA Region 2 alongside 82 other counties that share its rock and soil setting.

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. Don't read Zone 3 as a pass for Fulton County — EPA's guidance to test every home makes no exception for counties predicted low.

Next steps for a home in Fulton County

For a Fulton 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 New York's state radon program

For Fulton County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Fulton 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 Fulton County's figures come from

The methodology guide shows exactly which EPA and Census sources feed Fulton County's numbers. Whatever zone Fulton County carries, the zone explainer covers what it does and doesn't tell you about any one house.