Oktibbeha County, MS: EPA's radon zone, explained

EPA places Oktibbeha County in Zone 3 - Low Potential — a predicted county-wide average indoor radon level below 2 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Oktibbeha County sits at the 22nd percentile nationally for radon potential — above 22 of every 100 rated counties.

Oktibbeha County by the numbers

Oktibbeha County, Mississippi is home to about 51,965 people across 457.626 square miles. Population density there runs about 114 people per square mile. By population, Oktibbeha County is the 332nd largest of every county sharing its EPA zone — the 68th percentile by population within that zone. Oktibbeha County falls in EPA Radon Region 4, one of 736 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

A Zone 3 county like Oktibbeha County is predicted closer to the 0.4 pCi/L typical outdoors than to EPA's 4 pCi/L action level. Low doesn't mean zero: EPA's own data shows homes in Zone 3 counties like Oktibbeha County testing above the action level often enough that skipping a test isn't the safe assumption.

Testing and mitigation in Oktibbeha County

For a Oktibbeha 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 Mississippi's state radon program

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