Berrien County, GA: EPA's radon zone, explained

EPA's own radon map rates Berrien County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Nationally that's the 12th percentile for radon potential — Berrien County outranks 12% of every county EPA has rated.

Where Berrien County sits nationally

Berrien County, Georgia is home to about 18,666 people across 453.376 square miles. That works out to roughly 41 people per square mile. By population, Berrien County is the 649th largest of every county sharing its EPA zone — the 37th percentile by population within that zone. EPA's geology-based Region 4 groups Berrien County with 735 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Well clear of both the 1.3 pCi/L national indoor average and EPA's 4 pCi/L action level, Berrien County's Zone 3 prediction is the low end of the scale. A Zone 3 rating means Berrien County's county-wide average is predicted low, but EPA is explicit that a meaningful share of homes in low-potential zones still test above the action level — a low zone is not a reason to skip testing.

Testing and mitigation in Berrien County

For a Berrien County homeowner, the order is simple: test first, since a kit costs a small fraction of what mitigation would. Only if the result clears 4 pCi/L does a system — typically $800–$2,500, about $1,200 for a common install — become worth pricing out.

Find Georgia's state radon program

For Berrien County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Berrien County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. Code RADONZONE-10OFF takes 10% off at checkout.

Where Berrien County's figures come from

The methodology guide shows exactly which EPA and Census sources feed Berrien County's numbers. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.