Is Montgomery County, NY a radon risk area?

EPA places Montgomery 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. Montgomery County sits at the 55th percentile nationally for radon potential — above 55 of every 100 rated counties.

How Montgomery County compares

About 49,648 people live in Montgomery County, New York, spread over 403.111 square miles. That works out to roughly 123 people per square mile. Rank 345 by population within its EPA zone puts Montgomery County at the 67th percentile among zone peers. EPA's geology-based Region 2 groups Montgomery County with 82 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Montgomery County's Zone 2 prediction clears the 1.3 pCi/L national indoor average without reaching EPA's own 4 pCi/L point for recommending a fix. Nothing about a Zone 2 label lowers the case for testing in Montgomery County — EPA recommends it in every zone, moderate included.

If Montgomery County tests above the action level

Nothing about Montgomery County's EPA zone changes the mitigation number: $800–$2,500 nationally (around $1,200 typical), set by the house's foundation rather than the county it sits in — and only relevant once a test actually clears 4 pCi/L.

Find New York's state radon program

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

More on how this number was built

The methodology guide shows exactly which EPA and Census sources feed Montgomery County's numbers. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.