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

EPA places Lincoln County in Zone 3 - Low Potential — a predicted county-wide average indoor radon level below 2 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Rank it against the rest of the country and Lincoln County lands in the 19th percentile for radon potential.

How Lincoln County compares

Lincoln County, Mississippi is home to about 34,956 people across 586.207 square miles. Population density there runs about 60 people per square mile. By population, Lincoln County is the 440th largest of every county sharing its EPA zone — the 57th percentile by population within that zone. Geologically, Lincoln 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 Lincoln County

Lincoln 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. Low doesn't mean zero: EPA's own data shows homes in Zone 3 counties like Lincoln County testing above the action level often enough that skipping a test isn't the safe assumption.

Next steps for a home in Lincoln County

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

Where Lincoln County's figures come from

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