Is Chickasaw County, MS a radon risk area?

EPA's own radon map rates Chickasaw County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Nationally, Chickasaw County ranks higher in radon potential than 44% of rated counties (the 44th percentile).

How Chickasaw County compares

About 16,774 people live in Chickasaw County, Mississippi, spread over 501.782 square miles. Averaged across its land area, Chickasaw County runs about 33 people per square mile. Rank 679 by population within its EPA zone puts Chickasaw County at the 34th percentile among zone peers. Chickasaw 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

EPA's Zone 2 rating for Chickasaw County sits below its own 4 pCi/L action level but above the national indoor average of about 1.3 pCi/L. Chickasaw 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 Chickasaw County

Nothing about Chickasaw County's EPA zone changes the mitigation number: $800–$2,500 nationally (around $1,200 typical), set by the house's foundation rather than the county it sits in — and only relevant once a test actually clears 4 pCi/L.

Find Mississippi's state radon program

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

More on how this number was built

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. Whatever zone Chickasaw County carries, the zone explainer covers what it does and doesn't tell you about any one house.