Septic suitability in Steele County, MN
Very limited
Steele County, MN's SSURGO dominant class comes back "Very limited", covering 96.6% of the county. Expect the ground itself to work against a plain gravity system; USDA's strictest bucket alone covers 96.6% of the county. The county spans 429.588 square miles, home to 37,434 people.
What this number does and doesn't tell you
USDA's survey covers the whole of Steele County, MN at once, not any single address. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.
Steele County: conventional vs. engineered cost
96.6% of Steele 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, Steele County, MN ranks 435 most-constrained nationally, and 16 of 86 within Minnesota.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems