Bennett County's SSURGO septic rating

Very limited

USDA puts Bennett County, SD at "Very limited" for septic absorption fields, the dominant reading across 80.1% of the county's soil. This is the reading that pushes a project toward an engineered system rather than a conventional one, and it covers 80.1% of Bennett County's land. The county spans 1,184.642 square miles, home to 3,289 people.

What this number does and doesn't tell you

USDA's survey covers the whole of Bennett County, SD at once, not any single address. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.

Bennett County: conventional vs. engineered cost

80.1% of Bennett 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.

Bennett County's rank among South Dakota counties

Among the 3,058 rated counties on this site, Bennett County, SD ranks 2,039 most-constrained nationally, and 50 of 66 within South Dakota.

Further reading

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