Fall River County's SSURGO septic rating

Very limited

Fall River County, SD's SSURGO dominant class comes back "Very limited", covering 85.5% of the county. Expect the ground itself to work against a plain gravity system; USDA's strictest bucket alone covers 85.5% of the county. The county spans 1,739.889 square miles, home to 7,359 people.

What this number does and doesn't tell you

This is a countywide, area-weighted figure across every soil survey map unit in Fall River County, SD - never a reading for one specific parcel. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.

Fall River County: conventional vs. engineered cost

85.5% of Fall River 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.

How Fall River County, SD compares

Among the 3,058 rated counties on this site, Fall River County, SD ranks 1,657 most-constrained nationally, and 39 of 66 within South Dakota.

Related guides

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