Stevens County's SSURGO septic rating
Very limited
Stevens County, MN: USDA's soil survey calls 91.3% of the county "Very limited" for a septic leach field. That reading means a conventional system is a poor bet here - 91.3% of Stevens County lands in the strictest "very limited" bucket USDA uses. The county spans 563.662 square miles, home to 9,819 people.
What this number does and doesn't tell you
Stevens 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.
Stevens County: conventional vs. engineered cost
91.3% of Stevens 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, Stevens County, MN ranks 1,140 most-constrained nationally, and 38 of 86 within Minnesota.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems