Portage County, OH radon potential

EPA's own radon map rates Portage County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Rank it against the rest of the country and Portage County lands in the 61st percentile for radon potential.

Where Portage County sits nationally

Portage County, Ohio is home to about 163,839 people across 487.454 square miles. Averaged across its land area, Portage County runs about 336 people per square mile. Within its own EPA zone, Portage County is bigger by population than 86% of the counties that share it. Geologically, Portage 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 Portage County

Call it a middle case: above the 1.3 pCi/L most US homes average, below the 4 pCi/L line EPA uses to recommend mitigation — that's Portage County's Zone 2 prediction. Portage County's Zone 2 rating sits in the middle nationally; EPA's guidance is unchanged by that — test every home regardless of its zone.

Testing and mitigation in Portage 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 Ohio's state radon program

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

Where Portage County's figures come from

The methodology guide shows exactly which EPA and Census sources feed Portage County's numbers. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.