Forsyth County, GA: EPA's radon zone, explained
EPA places Forsyth County in Zone 2 - Moderate Potential — a predicted county-wide average indoor radon level between 2 and 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Nationally, Forsyth County ranks higher in radon potential than 63% of rated counties (the 63rd percentile).
Forsyth County by the numbers
Forsyth County, Georgia is home to about 280,096 people across 224.617 square miles. Population density there runs about 1,247 people per square mile. By population, Forsyth County is the 84th largest of every county sharing its EPA zone — the 92nd percentile by population within that zone. EPA's geology-based Region 4 groups Forsyth County with 735 other counties nationally sharing its underlying rock and soil profile.
Why the zone isn't the answer by itself
Forsyth County's Zone 2 prediction clears the 1.3 pCi/L national indoor average without reaching EPA's own 4 pCi/L point for recommending a fix. Middle-of-the-pack doesn't mean risk-free for any one Forsyth County address — a moderate county average still leaves individual homes to test either side of it.
Testing and mitigation in Forsyth County
For a Forsyth 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 Forsyth County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Forsyth 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 Forsyth County's figures come from
Forsyth County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. Whatever zone Forsyth County carries, the zone explainer covers what it does and doesn't tell you about any one house.