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

Orleans County is mapped as Zone 2 - Moderate Potential by EPA — meaning the county-wide average indoor level is predicted between 2 and 4 pCi/L. Orleans County sits at the 53rd percentile nationally for radon potential — above 53 of every 100 rated counties.

Where Orleans County sits nationally

Orleans County, New York is home to about 39,686 people across 391.262 square miles. Averaged across its land area, Orleans County runs about 101 people per square mile. By population, Orleans County is the 402nd largest of every county sharing its EPA zone — the 61st percentile by population within that zone. Geologically, Orleans County is grouped into EPA Region 2 alongside 82 other counties that share its rock and soil setting.

What this actually means for a house in Orleans County

EPA's Zone 2 rating for Orleans County sits below its own 4 pCi/L action level but above the national indoor average of about 1.3 pCi/L. Orleans County's Zone 2 rating sits in the middle nationally; EPA's guidance is unchanged by that — test every home regardless of its zone.

If Orleans County tests above the action level

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

Where Orleans County's figures come from

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