What Emmet County, MI's soil rates for a septic system
Very limited
Soil across 94.6% of Emmet County, MI rates "Very limited" in USDA's septic-absorption-field interpretation. This is the reading that pushes a project toward an engineered system rather than a conventional one, and it covers 94.6% of Emmet County's land. Emmet County covers 467.546 square miles and counts 33,949 residents.
This is a county figure, not a parcel figure
USDA's survey covers the whole of Emmet County, MI at once, not any single address. A site-specific perc test, usually $750-$1,850, is what a health department will actually require before permitting a lot in Emmet County.
System cost, conventional vs. engineered
Given Emmet County's rating, plan for the engineered-system range rather than the conventional one. The engineered-system range, $10,000-$40,000 (mound or aerobic treatment), is the more realistic number to plan around, against $3,000-$8,000 for a conventional system on the rare lot that passes.
How Emmet County, MI compares
Nationally, Emmet County, MI is the 706-most-constrained of 3,058 rated counties for septic soil. Within Michigan alone it ranks 34 of 83.
Further reading
How this rating is built, and its real limits · Conventional vs. engineered septic systems