Is Yalobusha County, MS a radon risk area?

EPA places Yalobusha 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. Nationally that's the 9th percentile for radon potential — Yalobusha County outranks 9% of every county EPA has rated.

How Yalobusha County compares

About 12,458 people live in Yalobusha County, Mississippi, spread over 467.151 square miles. Population density there runs about 27 people per square mile. Rank 761 by population within its EPA zone puts Yalobusha County at the 26th percentile among zone peers. Geologically, Yalobusha 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

Yalobusha 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. Don't read Zone 3 as a pass for Yalobusha County — EPA's guidance to test every home makes no exception for counties predicted low.

Next steps for a home in Yalobusha County

Nothing about Yalobusha County's EPA zone changes the mitigation number: $800–$2,500 nationally (around $1,200 typical), set by the house's foundation rather than the county it sits in — and only relevant once a test actually clears 4 pCi/L.

Find Mississippi's state radon program

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

Yalobusha County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.