What EPA's radon map says about Latimer County

EPA's own radon map rates Latimer County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. That puts Latimer County in the 6th percentile nationally for radon potential — higher than 6% of the counties EPA has rated.

Latimer County by the numbers

About 9,509 people live in Latimer County, Oklahoma, spread over 722.113 square miles. Averaged across its land area, Latimer County runs about 13 people per square mile. Among counties sharing Latimer County's EPA zone, it outranks 19% of them by population. Geologically, Latimer County is grouped into EPA Region 6 alongside 502 other counties that share its rock and soil setting.

Why the zone isn't the answer by itself

A Zone 3 county like Latimer County is predicted closer to the 0.4 pCi/L typical outdoors than to EPA's 4 pCi/L action level. Don't read Zone 3 as a pass for Latimer County — EPA's guidance to test every home makes no exception for counties predicted low.

Next steps for a home in Latimer County

Mitigation cost doesn't depend on Latimer County's zone — it depends on the house's foundation. A typical system runs $800–$2,500 (about $1,200 typical), and testing first is what tells you whether that's needed at all.

Find Oklahoma's state radon program

Latimer County's test kit answers today; a Airthings radon monitor keeps answering for Latimer County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. Code RADONZONE-10OFF takes 10% off at checkout.

More on how this number was built

Latimer County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. Whatever zone Latimer County carries, the zone explainer covers what it does and doesn't tell you about any one house.