Ziebach County, SD: the USDA septic-suitability picture

Very limited

Ziebach County, SD: USDA's soil survey calls 89.4% of the county "Very limited" for a septic leach field. That reading means a conventional system is a poor bet here - 89.4% of Ziebach County lands in the strictest "very limited" bucket USDA uses. For scale: 1,961.248 square miles and 2,418 people call Ziebach County home.

Before you rely on this for one lot

This is a countywide, area-weighted figure across every soil survey map unit in Ziebach County, SD - 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 Ziebach County, SD

Ziebach 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.

Ziebach County's rank among South Dakota counties

Among the 3,058 rated counties on this site, Ziebach County, SD ranks 1,337 most-constrained nationally, and 30 of 66 within South Dakota.

Further reading

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