Septic suitability in McCook County, SD

Very limited

McCook County, SD: USDA's soil survey calls 88.5% 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 88.5% of McCook County's land. For scale: 574.205 square miles and 5,771 people call McCook County home.

Before you rely on this for one lot

USDA's survey covers the whole of McCook County, SD at once, not any single address. 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 McCook County, SD

McCook 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.

How McCook County, SD compares

Among the 3,058 rated counties on this site, McCook County, SD ranks 1,425 most-constrained nationally, and 33 of 66 within South Dakota.

Further reading

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