Tuscola County, MI: EPA's radon zone, explained

EPA's own radon map rates Tuscola County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Nationally that's the 22nd percentile for radon potential — Tuscola County outranks 22% of every county EPA has rated.

Tuscola County by the numbers

Tuscola County, Michigan is home to about 52,757 people across 804.902 square miles. Population density there runs about 66 people per square mile. By population, Tuscola County is the 329th largest of every county sharing its EPA zone — the 68th percentile by population within that zone. Tuscola County falls in EPA Radon Region 5, one of 524 counties nationally EPA assigns to that same geologic province.

What this actually means for a house in Tuscola County

Tuscola County's Zone 3 prediction undercuts the roughly 1.3 pCi/L most US homes average, nowhere near EPA's 4 pCi/L threshold for recommending mitigation. Even at Zone 3, Tuscola County homes are not guaranteed a low reading — zone is a county-wide average, and EPA recommends testing every home regardless of zone.

Testing and mitigation in Tuscola County

For a Tuscola 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 Michigan's state radon program

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

Where Tuscola County's figures come from

Tuscola County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. Whatever zone Tuscola County carries, the zone explainer covers what it does and doesn't tell you about any one house.