Is Chambers County, AL a radon risk area?

Chambers County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. That puts Chambers County in the 19th percentile nationally for radon potential — higher than 19% of the counties EPA has rated.

Chambers County by the numbers

About 33,813 people live in Chambers County, Alabama, spread over 596.559 square miles. That works out to roughly 57 people per square mile. Rank 448 by population within its EPA zone puts Chambers County at the 57th percentile among zone peers. Chambers County falls in EPA Radon Region 4, one of 736 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

Well clear of both the 1.3 pCi/L national indoor average and EPA's 4 pCi/L action level, Chambers County's Zone 3 prediction is the low end of the scale. Low doesn't mean zero: EPA's own data shows homes in Zone 3 counties like Chambers County testing above the action level often enough that skipping a test isn't the safe assumption.

Testing and mitigation in Chambers County

Nothing about Chambers 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

Chambers County's test kit answers today; a Airthings radon monitor keeps answering for Chambers 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 Chambers County's numbers. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.