Is Jackson County, AL a radon risk area?

EPA's own radon map rates Jackson County zone 1 - highest potential, predicting a county-wide average indoor level above 4 pCi/L. Rank it against the rest of the country and Jackson County lands in the 90th percentile for radon potential.

Jackson County by the numbers

About 53,780 people live in Jackson County, Alabama, spread over 1,078.014 square miles. Population density there runs about 50 people per square mile. Rank 299 by population within its EPA zone puts Jackson County at the 72nd percentile among zone peers. EPA's geology-based Region 4 groups Jackson County with 735 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Outdoor air nationally averages about 0.4 pCi/L, indoor air about 1.3 pCi/L — Jackson County's Zone 1 prediction clears both of those and EPA's fix-it threshold besides. A Zone 1 rating means testing is worth doing sooner rather than later, but it is still county-wide average, not a reading for any single house — some homes in Jackson County will test well under the action level, and EPA's guidance is to test regardless of zone.

Testing and mitigation in Jackson County

Nothing about Jackson 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 Alabama's state radon program

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

Jackson County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.