St. Joseph County, MI Septic Rating

St. Joseph County, MI: the USDA septic-suitability picture

Very limited

St. Joseph County, MI's SSURGO dominant class comes back "Very limited", covering 92.1% of the county. This is the reading that pushes a project toward an engineered system rather than a conventional one, covering that same share of St. Joseph County's land. The county spans 501 square miles, home to 61,171 people.

What this number does and doesn't tell you

Two lots a mile apart in St. Joseph 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.

St. Joseph County: conventional vs. engineered cost

92.1% of St. Joseph 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 St. Joseph County, MI compares

Among the 3,058 rated counties on this site, St. Joseph County, MI ranks 1,026 most-constrained nationally, and 52 of 83 within Michigan.

Further reading

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