Wyandot County, OH radon potential

Wyandot County is mapped as Zone 1 - Highest Potential by EPA — meaning the county-wide average indoor level is predicted above 4 pCi/L. That puts Wyandot County in the 82nd percentile nationally for radon potential — higher than 82% of the counties EPA has rated.

How Wyandot County compares

Wyandot County, Ohio is home to about 21,394 people across 406.879 square miles. Population density there runs about 53 people per square mile. Within its own EPA zone, Wyandot County is bigger by population than 48% of the counties that share it. Wyandot County falls in EPA Radon Region 5, one of 524 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

Wyandot County carries a Zone 1 label because its predicted average clears 4 pCi/L outright — three-plus times the 0.4 pCi/L typical outdoors and above the 1.3 pCi/L most homes see. That doesn't mean every Wyandot County house tests high — a zone is a county-wide prediction, never a single-home reading — but it's a reason to test sooner rather than let it wait.

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