Putnam County, GA radon potential

EPA's own radon map rates Putnam County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. That puts Putnam County in the 15th percentile nationally for radon potential — higher than 15% of the counties EPA has rated.

Where Putnam County sits nationally

Putnam County, Georgia is home to about 23,383 people across 344.682 square miles. Averaged across its land area, Putnam County runs about 68 people per square mile. Within its own EPA zone, Putnam County is bigger by population than 46% of the counties that share it. Geologically, Putnam County is grouped into EPA Region 4 alongside 735 other counties that share its rock and soil setting.

Zone vs. an actual test

At Zone 3, Putnam 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, Putnam County homes are not guaranteed a low reading — zone is a county-wide average, and EPA recommends testing every home regardless of zone.

Next steps for a home in Putnam County

A short-term test kit is the standard first step and typically costs far less than mitigation itself. If a test comes back at or above 4 pCi/L, a radon mitigation system for a typical home runs roughly $800–$2,500 (around $1,200 for a common single-family install), driven mainly by foundation type, not by county.

Find Georgia's state radon program

For Putnam County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Putnam 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 Putnam 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 Putnam County carries, the zone explainer covers what it does and doesn't tell you about any one house.