Faulk County, SD's soil, for a septic absorption field

Very limited

Soil across 49.3% of Faulk County, SD rates "Very limited" in USDA's septic-absorption-field interpretation. This is the reading that pushes a project toward an engineered system rather than a conventional one, and it covers 49.3% of Faulk County's land. Faulk County covers 981.713 square miles and counts 2,136 residents.

This is a county figure, not a parcel figure

This is a countywide, area-weighted figure across every soil survey map unit in Faulk County, SD - never a reading for one specific parcel. A site-specific perc test, usually $750-$1,850, is what a health department will actually require before permitting a lot in Faulk County.

System cost, conventional vs. engineered

Given Faulk County's rating, plan for the engineered-system range rather than the conventional one. The engineered-system range, $10,000-$40,000 (mound or aerobic treatment), is the more realistic number to plan around, against $3,000-$8,000 for a conventional system on the rare lot that passes.

Faulk County's rank among South Dakota counties

Nationally, Faulk County, SD is the 2,893-most-constrained of 3,058 rated counties for septic soil. Within South Dakota alone it ranks 63 of 66.

Before you act on this

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