Crawford County, MI's soil, for a septic absorption field

Very limited

98.4% of Crawford 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. That reading means a conventional system is a poor bet here - 98.4% of Crawford County lands in the strictest "very limited" bucket USDA uses. Crawford County, MI is 556.418 square miles with a population of 13,599.

What Crawford County's reading doesn't cover

This is a countywide, area-weighted figure across every soil survey map unit in Crawford County, MI - never a reading for one specific parcel. A local percolation test, typically $750-$1,850 (around $1,300 typical), is the only way to know what one lot in Crawford County will actually do.

What a system would cost here

With 98.4% of Crawford 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.

Crawford County's rank among Michigan counties

Nationally, Crawford County, MI is the 193-most-constrained of 3,058 rated counties for septic soil. Within Michigan alone it ranks 3 of 83.

Further reading

How this rating is built, and its real limits · Conventional vs. engineered septic systems