Orange County, NY radon potential

EPA places Orange 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 that's the 98th percentile for radon potential — Orange County outranks 98% of every county EPA has rated.

Orange County by the numbers

Orange County, New York is home to about 411,767 people across 812.079 square miles. Averaged across its land area, Orange County runs about 507 people per square mile. Within its own EPA zone, Orange County is bigger by population than 95% of the counties that share it. Orange County falls in EPA Radon Region 2, one of 83 counties nationally EPA assigns to that same geologic province.

What this actually means for a house in Orange County

Fixing a home becomes an EPA recommendation past 4 pCi/L, and that is precisely the side of the line Orange County's Zone 1 prediction lands on, well above the roughly 1.3 pCi/L most US homes average. EPA's guidance doesn't change because of a Zone 1 label: test the house. What changes is the reason to not put it off in Orange County specifically.

If Orange 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 Orange County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Orange 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 Orange 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. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.