Geauga County, OH: EPA's radon zone, explained

EPA places Geauga 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, Geauga County ranks higher in radon potential than 59% of rated counties (the 59th percentile).

Where Geauga County sits nationally

Geauga County, Ohio is home to about 95,362 people across 400.44 square miles. That works out to roughly 238 people per square mile. By population, Geauga County is the 211th largest of every county sharing its EPA zone — the 80th percentile by population within that zone. Geologically, Geauga County is grouped into EPA Region 5 alongside 523 other counties that share its rock and soil setting.

What this actually means for a house in Geauga County

Neither at the 4 pCi/L action level nor down at the roughly 1.3 pCi/L national indoor norm, Geauga County's Zone 2 prediction lands in the gap between the two. Nothing about a Zone 2 label lowers the case for testing in Geauga County — EPA recommends it in every zone, moderate included.

If Geauga County tests above the action level

For a Geauga 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 Ohio's state radon program

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