What EPA's radon map says about Gilmer County

EPA places Gilmer 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 that's the 51st percentile for radon potential — Gilmer County outranks 51% of every county EPA has rated.

Where Gilmer County sits nationally

About 33,327 people live in Gilmer County, Georgia, spread over 426.181 square miles. Population density there runs about 78 people per square mile. Among counties sharing Gilmer County's EPA zone, it outranks 56% of them by population. Gilmer County falls in EPA Radon Region 4, one of 736 counties nationally EPA assigns to that same geologic province.

What this actually means for a house in Gilmer County

Gilmer 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. Nothing about a Zone 2 label lowers the case for testing in Gilmer County — EPA recommends it in every zone, moderate included.

If Gilmer County tests above the action level

Mitigation cost doesn't depend on Gilmer County's zone — it depends on the house's foundation. A typical system runs $800–$2,500 (about $1,200 typical), and testing first is what tells you whether that's needed at all.

Find Georgia's state radon program

Gilmer County's test kit answers today; a Airthings radon monitor keeps answering for Gilmer County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. RADONZONE-10OFF at checkout knocks 10% off.

More on how this number was built

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