Rush County, IN: the USDA septic-suitability picture
Very limited
USDA puts Rush County, IN at "Very limited" for septic absorption fields, the dominant reading across 99.7% of the county's soil. That reading means a conventional system is a poor bet here - 99.7% of Rush County lands in the strictest "very limited" bucket USDA uses. The county spans 408.137 square miles, home to 16,759 people.
What this number does and doesn't tell you
Nothing about Rush County, IN's SSURGO figure applies to a specific address - it's a county-wide average. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.
Rush County: conventional vs. engineered cost
99.7% of Rush 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.
Rush County's rank among Indiana counties
Among the 3,058 rated counties on this site, Rush County, IN ranks 12 most-constrained nationally, and 2 of 90 within Indiana.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems