What EPA's radon map says about Hinds County

EPA's own radon map rates Hinds County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Nationally, Hinds County ranks higher in radon potential than 29% of rated counties (the 29th percentile).

Where Hinds County sits nationally

About 211,975 people live in Hinds County, Mississippi, spread over 869.845 square miles. That works out to roughly 244 people per square mile. Among counties sharing Hinds County's EPA zone, it outranks 88% of them by population. Geologically, Hinds 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

Hinds 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 Hinds 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 Hinds County

Mitigation cost doesn't depend on Hinds 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

Hinds County's test kit answers today; a Airthings radon monitor keeps answering for Hinds 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

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