Adair County, OK radon potential

EPA places Adair 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. Adair County sits at the 46th percentile nationally for radon potential — above 46 of every 100 rated counties.

How Adair County compares

Adair County, Oklahoma is home to about 19,821 people across 573.881 square miles. Population density there runs about 35 people per square mile. Within its own EPA zone, Adair County is bigger by population than 39% of the counties that share it. EPA's geology-based Region 6 groups Adair County with 502 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Adair 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. Adair County's Zone 2 rating sits in the middle nationally; EPA's guidance is unchanged by that — test every home regardless of its zone.

Testing and mitigation in Adair County

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 Oklahoma's state radon program

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

The methodology guide shows exactly which EPA and Census sources feed Adair County's numbers. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.