Pickens County, SC: the USDA septic-suitability picture
Very limited
Pickens County, SC: USDA's soil survey calls 67% 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 67% of Pickens County's land. For scale: 496.95 square miles and 138,207 people call Pickens County home.
Before you rely on this for one lot
This is a countywide, area-weighted figure across every soil survey map unit in Pickens County, SC - 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 Pickens County, SC
Pickens 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.
Where this sits nationally
Among the 3,058 rated counties on this site, Pickens County, SC ranks 2,565 most-constrained nationally, and 27 of 46 within South Carolina.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems