Septic suitability in Lapeer County, MI
Very limited
Lapeer County, MI's SSURGO dominant class comes back "Very limited", covering 92% of the county. Practically, that rules out a simple gravity system for most of the county - 92% of it sits in USDA's most-constrained bucket. The county spans 647.475 square miles, home to 89,168 people.
What this number does and doesn't tell you
Nothing about Lapeer County, MI's SSURGO figure applies to a specific address - it's a county-wide average. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.
Lapeer County: conventional vs. engineered cost
92% of Lapeer 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.
Where this sits nationally
Among the 3,058 rated counties on this site, Lapeer County, MI ranks 1,037 most-constrained nationally, and 54 of 83 within Michigan.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems