Cimarron County, OK: EPA's radon zone, explained

Cimarron 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. That puts Cimarron County in the 34th percentile nationally for radon potential — higher than 34% of the counties EPA has rated.

Cimarron County by the numbers

Cimarron County, Oklahoma is home to about 2,133 people across 1,834.808 square miles. Population density there runs about 1 people per square mile. By population, Cimarron County is the 1000th largest of every county sharing its EPA zone — the 3rd percentile by population within that zone. EPA's geology-based Region 6 groups Cimarron County with 502 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

Cimarron 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. Nothing about a Zone 2 label lowers the case for testing in Cimarron County — EPA recommends it in every zone, moderate included.

Testing and mitigation in Cimarron County

For a Cimarron 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 Oklahoma's state radon program

For Cimarron County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Cimarron 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 Cimarron 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.