Jackson County, MS radon potential

Jackson County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. That puts Jackson County in the 27th percentile nationally for radon potential — higher than 27% of the counties EPA has rated.

Jackson County by the numbers

Jackson County, Mississippi is home to about 147,002 people across 722.825 square miles. Population density there runs about 203 people per square mile. Within its own EPA zone, Jackson County is bigger by population than 83% of the counties that share it. Jackson 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, Jackson County's Zone 3 prediction is the low end of the scale. Even at Zone 3, Jackson County homes are not guaranteed a low reading — zone is a county-wide average, and EPA recommends testing every home regardless of zone.

Testing and mitigation in Jackson County

A short-term test kit is the standard first step and typically costs far less than mitigation itself. If a test comes back at or above 4 pCi/L, a radon mitigation system for a typical home runs roughly $800–$2,500 (around $1,200 for a common single-family install), driven mainly by foundation type, not by county.

Find Mississippi's state radon program

For Jackson County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Jackson 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 Jackson County's figures come from

The methodology guide shows exactly which EPA and Census sources feed Jackson County's numbers. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.