Is Issaquena County, MS a radon risk area?

EPA's own radon map rates Issaquena County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. That puts Issaquena County in the 1st percentile nationally for radon potential — higher than 1% of the counties EPA has rated.

Issaquena County by the numbers

About 1,295 people live in Issaquena County, Mississippi, spread over 412.98 square miles. Population density there runs about 3 people per square mile. Rank 1006 by population within its EPA zone puts Issaquena County at the 2nd percentile among zone peers. EPA's geology-based Region 4 groups Issaquena County with 735 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

At Zone 3, Issaquena County's predicted county average is under the national indoor average (~1.3 pCi/L) and well below EPA's 4 pCi/L action level — outdoor air nationally runs about 0.4 pCi/L for comparison. Low doesn't mean zero: EPA's own data shows homes in Zone 3 counties like Issaquena County testing above the action level often enough that skipping a test isn't the safe assumption.

Next steps for a home in Issaquena County

Nothing about Issaquena 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

Issaquena County's test kit answers today; a Airthings radon monitor keeps answering for Issaquena 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

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