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

EPA places Charlton County in Zone 3 - Low Potential — a predicted county-wide average indoor radon level below 2 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Rank it against the rest of the country and Charlton County lands in the 9th percentile for radon potential.

Charlton County by the numbers

Charlton County, Georgia is home to about 13,021 people across 780.093 square miles. Population density there runs about 17 people per square mile. By population, Charlton County is the 751st largest of every county sharing its EPA zone — the 27th percentile by population within that zone. Geologically, Charlton County is grouped into EPA Region 4 alongside 735 other counties that share its rock and soil setting.

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, Charlton County's Zone 3 prediction is the low end of the scale. Don't read Zone 3 as a pass for Charlton County — EPA's guidance to test every home makes no exception for counties predicted low.

If Charlton County tests above the action level

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

Where Charlton County's figures come from

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. Whatever zone Charlton County carries, the zone explainer covers what it does and doesn't tell you about any one house.