Greene County, NY radon potential

EPA's own radon map rates Greene County zone 1 - highest potential, predicting a county-wide average indoor level above 4 pCi/L. That puts Greene County in the 89th percentile nationally for radon potential — higher than 89% of the counties EPA has rated.

Where Greene County sits nationally

Greene County, New York is home to about 46,903 people across 647.161 square miles. That works out to roughly 72 people per square mile. Within its own EPA zone, Greene County is bigger by population than 69% of the counties that share it. EPA's geology-based Region 2 groups Greene County with 82 other counties nationally sharing its underlying rock and soil profile.

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 Greene County's Zone 1 prediction lands on, well above the roughly 1.3 pCi/L most US homes average. Some Greene 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.

If Greene County tests above the action level

A short-term test kit is the standard first step and typically costs far less than mitigation itself. If a test comes back at or above 4 pCi/L, a radon mitigation system for a typical home runs roughly $800–$2,500 (around $1,200 for a common single-family install), driven mainly by foundation type, not by county.

Find New York's state radon program

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

Greene County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.