Septic suitability in Tuscola County, MI
Very limited
Tuscola County, MI's SSURGO dominant class comes back "Very limited", covering 96.6% of the county. 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 804.902 square miles, home to 52,757 people.
What this number does and doesn't tell you
Two lots a mile apart in Tuscola 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.
Tuscola County: conventional vs. engineered cost
96.6% of Tuscola 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.
Tuscola County's rank among Michigan counties
Among the 3,058 rated counties on this site, Tuscola County, MI ranks 433 most-constrained nationally, and 18 of 83 within Michigan.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems