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

Leflore County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Nationally, Leflore County ranks higher in radon potential than 16% of rated counties (the 16th percentile).

Where Leflore County sits nationally

Leflore County, Mississippi is home to about 26,157 people across 594.074 square miles. That works out to roughly 44 people per square mile. By population, Leflore County is the 527th largest of every county sharing its EPA zone — the 49th percentile by population within that zone. EPA's geology-based Region 4 groups Leflore County with 735 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

Leflore County's predicted average sits below the national indoor average of about 1.3 pCi/L, well under EPA's 4 pCi/L action level. Low doesn't mean zero: EPA's own data shows homes in Zone 3 counties like Leflore County testing above the action level often enough that skipping a test isn't the safe assumption.

If Leflore County tests above the action level

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

Where Leflore County's figures come from

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