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

EPA places Broome County in Zone 1 - Highest Potential — a predicted county-wide average indoor radon level above 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Nationally, Broome County ranks higher in radon potential than 97% of rated counties (the 97th percentile).

Broome County by the numbers

Broome County, New York is home to about 196,397 people across 705.651 square miles. That works out to roughly 278 people per square mile. By population, Broome County is the 99th largest of every county sharing its EPA zone — the 91st percentile by population within that zone. Geologically, Broome County is grouped into EPA Region 2 alongside 82 other counties that share its rock and soil setting.

Zone vs. an actual test

Fixing a home becomes an EPA recommendation past 4 pCi/L, and that is precisely the side of the line Broome County's Zone 1 prediction lands on, well above the roughly 1.3 pCi/L most US homes average. Some Broome County homes will test comfortably under the action level despite the county's Zone 1 rating — the only way to know which kind of home you have is an actual test.

Testing and mitigation in Broome County

For a Broome 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 Broome County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Broome County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. Use code RADONZONE-10OFF at checkout for 10% off.

Where Broome 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. Whatever zone Broome County carries, the zone explainer covers what it does and doesn't tell you about any one house.