Carroll County, MS radon potential

EPA's own radon map rates Carroll County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Nationally, Carroll County ranks higher in radon potential than 6% of rated counties (the 6th percentile).

Where Carroll County sits nationally

Carroll County, Mississippi is home to about 9,378 people across 628.388 square miles. That works out to roughly 15 people per square mile. Within its own EPA zone, Carroll County is bigger by population than 19% of the counties that share it. Geologically, Carroll County is grouped into EPA Region 4 alongside 735 other counties that share its rock and soil setting.

What this actually means for a house in Carroll County

Carroll County's Zone 3 prediction undercuts the roughly 1.3 pCi/L most US homes average, nowhere near EPA's 4 pCi/L threshold for recommending mitigation. A Zone 3 label describes Carroll County's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

Next steps for a home in Carroll 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 Carroll County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Carroll 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 Carroll County's figures come from

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