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

EPA's own radon map rates Choctaw County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Nationally that's the 5th percentile for radon potential — Choctaw County outranks 5% of every county EPA has rated.

How Choctaw County compares

Choctaw County, Mississippi is home to about 8,091 people across 418.197 square miles. Averaged across its land area, Choctaw County runs about 19 people per square mile. By population, Choctaw County is the 875th largest of every county sharing its EPA zone — the 15th percentile by population within that zone. Choctaw County falls in EPA Radon Region 4, one of 736 counties nationally EPA assigns to that same geologic province.

Why the zone isn't the answer by itself

Well clear of both the 1.3 pCi/L national indoor average and EPA's 4 pCi/L action level, Choctaw County's Zone 3 prediction is the low end of the scale. A Zone 3 rating means Choctaw County's county-wide average is predicted low, but EPA is explicit that a meaningful share of homes in low-potential zones still test above the action level — a low zone is not a reason to skip testing.

If Choctaw County tests above the action level

For a Choctaw 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 Choctaw County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Choctaw County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. RADONZONE-10OFF at checkout knocks 10% off.

Where Choctaw 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.