What EPA's radon map says about Yazoo County

EPA places Yazoo 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. That puts Yazoo County in the 15th percentile nationally for radon potential — higher than 15% of the counties EPA has rated.

Yazoo County by the numbers

About 23,024 people live in Yazoo County, Mississippi, spread over 922.339 square miles. That works out to roughly 25 people per square mile. Among counties sharing Yazoo County's EPA zone, it outranks 46% of them by population. Geologically, Yazoo County is grouped into EPA Region 4 alongside 735 other counties that share its rock and soil setting.

Why the zone isn't the answer by itself

Yazoo 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. Even at Zone 3, Yazoo County homes are not guaranteed a low reading — zone is a county-wide average, and EPA recommends testing every home regardless of zone.

Next steps for a home in Yazoo County

Mitigation cost doesn't depend on Yazoo 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

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

More on how this number was built

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