Medina County, OH radon potential

EPA's own radon map rates Medina County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Nationally, Medina County ranks higher in radon potential than 62% of rated counties (the 62nd percentile).

Where Medina County sits nationally

Medina County, Ohio is home to about 184,625 people across 421.459 square miles. Averaged across its land area, Medina County runs about 438 people per square mile. Within its own EPA zone, Medina County is bigger by population than 87% of the counties that share it. EPA's geology-based Region 5 groups Medina County with 523 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

Medina County's predicted average falls between EPA's 4 pCi/L action level and the national indoor average of about 1.3 pCi/L (outdoor air runs roughly 0.4 pCi/L). Medina County's Zone 2 rating sits in the middle nationally; EPA's guidance is unchanged by that — test every home regardless of its zone.

Next steps for a home in Medina 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 Medina County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Medina 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 Medina 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. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.