Is Adams County, MS a radon risk area?

EPA's own radon map rates Adams County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Nationally that's the 17th percentile for radon potential — Adams County outranks 17% of every county EPA has rated.

How Adams County compares

About 28,674 people live in Adams County, Mississippi, spread over 462.344 square miles. That works out to roughly 62 people per square mile. Rank 497 by population within its EPA zone puts Adams County at the 52nd percentile among zone peers. EPA's geology-based Region 4 groups Adams County with 735 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

At Zone 3, Adams County's predicted county average is under the national indoor average (~1.3 pCi/L) and well below EPA's 4 pCi/L action level — outdoor air nationally runs about 0.4 pCi/L for comparison. Even at Zone 3, Adams County homes are not guaranteed a low reading — zone is a county-wide average, and EPA recommends testing every home regardless of zone.

Testing and mitigation in Adams County

Nothing about Adams 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

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

The methodology guide shows exactly which EPA and Census sources feed Adams County's numbers. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.