Antrim County's SSURGO septic rating
Very limited
Antrim County, MI: USDA's soil survey calls 81.8% of the county "Very limited" for a septic leach field. A standard gravity system routinely fails on ground like this; the same share of the county falls in USDA's worst absorption-field bucket outright. The county spans 475.69 square miles, home to 24,536 people.
What this number does and doesn't tell you
Two lots a mile apart in Antrim County can carry different soil, even though they share one countywide rating. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.
Antrim County: conventional vs. engineered cost
81.8% of Antrim County carrying a "Very limited" reading changes the realistic budget here. Conventional systems run $3,000-$8,000 where they pass; where they don't, engineered alternatives (mound or aerobic treatment, whichever the health department requires) run $10,000-$40,000 - budget toward the higher figure until a perc test says otherwise.
Antrim County's rank among Michigan counties
Among the 3,058 rated counties on this site, Antrim County, MI ranks 1,941 most-constrained nationally, and 77 of 83 within Michigan.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems