What EPA's radon map says about Lee County

EPA places Lee County in Zone 2 - Moderate Potential — a predicted county-wide average indoor radon level between 2 and 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Nationally, Lee County ranks higher in radon potential than 59% of rated counties (the 59th percentile).

Lee County by the numbers

About 83,012 people live in Lee County, Mississippi, spread over 449.965 square miles. Averaged across its land area, Lee County runs about 184 people per square mile. Among counties sharing Lee County's EPA zone, it outranks 78% of them by population. EPA's geology-based Region 4 groups Lee County with 735 other counties nationally sharing its underlying rock and soil profile.

What this actually means for a house in Lee County

Lee County's Zone 2 prediction clears the 1.3 pCi/L national indoor average without reaching EPA's own 4 pCi/L point for recommending a fix. Lee County's Zone 2 rating sits in the middle nationally; EPA's guidance is unchanged by that — test every home regardless of its zone.

Testing and mitigation in Lee County

Mitigation cost doesn't depend on Lee County's zone — it depends on the house's foundation. A typical system runs $800–$2,500 (about $1,200 typical), and testing first is what tells you whether that's needed at all.

Find Mississippi's state radon program

Lee County's test kit answers today; a Airthings radon monitor keeps answering for Lee County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. RADONZONE-10OFF at checkout knocks 10% off.

More on how this number was built

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. Whatever zone Lee County carries, the zone explainer covers what it does and doesn't tell you about any one house.