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

EPA's own radon map rates Monroe County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Monroe County sits at the 65th percentile nationally for radon potential — above 65 of every 100 rated counties.

Where Monroe County sits nationally

Monroe County, New York is home to about 752,202 people across 656.967 square miles. Averaged across its land area, Monroe County runs about 1,145 people per square mile. By population, Monroe County is the 28th largest of every county sharing its EPA zone — the 97th percentile by population within that zone. EPA's geology-based Region 2 groups Monroe County with 82 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

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 Monroe County's Zone 2 prediction. Middle-of-the-pack doesn't mean risk-free for any one Monroe County address — a moderate county average still leaves individual homes to test either side of it.

Testing and mitigation in Monroe County

For a Monroe 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 Monroe County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Monroe 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 Monroe 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. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.