Dubois County's SSURGO septic rating
Very limited
Dubois County, IN: USDA's soil survey calls 95.5% of the county "Very limited" for a septic leach field. This is the reading that pushes a project toward an engineered system rather than a conventional one, and it covers 95.5% of Dubois County's land. For scale: 427.267 square miles and 43,629 people call Dubois County home.
Before you rely on this for one lot
This is a countywide, area-weighted figure across every soil survey map unit in Dubois County, IN - never a reading for one specific parcel. The real answer for one lot is still a site-specific perc test, running about $750-$1,850 (typically near $1,300).
Budgeting for a system in Dubois County, IN
Dubois County's soil reading pushes the likely outcome toward an engineered system rather than a conventional one. 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, Dubois County, IN ranks 597 most-constrained nationally, and 37 of 90 within Indiana.
Further reading
How this rating is built, and its real limits · Conventional vs. engineered septic systems