What Baraga County, MI's soil rates for a septic system
Very limited
99.8% of Baraga County, MI's surveyed soil comes back "Very limited" in USDA's own SSURGO data, the county's dominant condition for a septic absorption field. Practically, that rules out a simple gravity system for most of the county - 99.8% of it sits in USDA's most-constrained bucket. Baraga County, MI is 898.427 square miles with a population of 8,169.
What Baraga County's reading doesn't cover
Nothing about Baraga County, MI's SSURGO figure applies to a specific address - it's a county-wide average. A local percolation test, typically $750-$1,850 (around $1,300 typical), is the only way to know what one lot in Baraga County will actually do.
What a system would cost here
With 99.8% of Baraga County rating "Very limited", a standard gravity system is not a safe assumption here. 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.
Where this sits nationally
Nationally, Baraga County, MI is the 8-most-constrained of 3,058 rated counties for septic soil. Within Michigan alone it ranks 1 of 83.
Further reading
How this rating is built, and its real limits · Conventional vs. engineered septic systems