Edgefield County, SC: the USDA septic-suitability picture

Somewhat limited

USDA puts Edgefield County, SC at "Somewhat limited" for septic absorption fields, the dominant reading across 60.8% of the county's soil. A conventional system can still work here with design changes - a larger field, added fill, or a shallower layout - but it isn't guaranteed. For scale: 500.688 square miles and 29,455 people call Edgefield County home.

Before you rely on this for one lot

This is a countywide, area-weighted figure across every soil survey map unit in Edgefield 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 Edgefield County, SC

Edgefield 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, Edgefield County, SC ranks 2,970 most-constrained nationally, and 43 of 46 within South Carolina.

Before you act on this

How this rating is built, and its real limits · How a percolation test actually works