Septic suitability in Keweenaw County, MI

Very limited

Keweenaw County, MI: USDA's soil survey calls 91.6% of the county "Very limited" for a septic leach field. Practically, that rules out a simple gravity system for most of the county - 91.6% of it sits in USDA's most-constrained bucket. The county spans 540.112 square miles, home to 2,161 people.

What this number does and doesn't tell you

Keweenaw County's rating is an average across the whole county, not a promise about any one lot inside it. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.

Keweenaw County: conventional vs. engineered cost

91.6% of Keweenaw 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.

How Keweenaw County, MI compares

Among the 3,058 rated counties on this site, Keweenaw County, MI ranks 1,101 most-constrained nationally, and 56 of 83 within Michigan.

Before you act on this

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