Is Lowndes County, MS a radon risk area?

EPA places Lowndes 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. Lowndes County sits at the 56th percentile nationally for radon potential — above 56 of every 100 rated counties.

How Lowndes County compares

About 57,210 people live in Lowndes County, Mississippi, spread over 506.068 square miles. That works out to roughly 113 people per square mile. Rank 317 by population within its EPA zone puts Lowndes County at the 69th percentile among zone peers. Lowndes County falls in EPA Radon Region 4, one of 736 counties nationally EPA assigns to that same geologic province.

What this actually means for a house in Lowndes County

Lowndes 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. A Zone 2 rating is a moderate county-wide average, not a guarantee about any one house in Lowndes County — testing is the only way to know an individual home's actual level.

If Lowndes County tests above the action level

Nothing about Lowndes 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

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

More on how this number was built

The methodology guide shows exactly which EPA and Census sources feed Lowndes County's numbers. Whatever zone Lowndes County carries, the zone explainer covers what it does and doesn't tell you about any one house.