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

EPA's own radon map rates Oscoda County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Nationally that's the 6th percentile for radon potential — Oscoda County outranks 6% of every county EPA has rated.

Where Oscoda County sits nationally

Oscoda County, Michigan is home to about 8,596 people across 565.674 square miles. Population density there runs about 15 people per square mile. By population, Oscoda County is the 859th largest of every county sharing its EPA zone — the 17th percentile by population within that zone. Oscoda County falls in EPA Radon Region 5, one of 524 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

Well clear of both the 1.3 pCi/L national indoor average and EPA's 4 pCi/L action level, Oscoda County's Zone 3 prediction is the low end of the scale. A Zone 3 label describes Oscoda County's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

Next steps for a home in Oscoda County

For a Oscoda 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 Oscoda County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Oscoda 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 Oscoda County's figures come from

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