What Lexington County, SC's soil rates for a septic system

Very limited

74.8% of Lexington County, SC's surveyed soil comes back "Very limited" in USDA's own SSURGO data, the county's dominant condition for a septic absorption field. This is the reading that pushes a project toward an engineered system rather than a conventional one, and it covers 74.8% of Lexington County's land. Lexington County covers 698.548 square miles and counts 313,774 residents.

This is a county figure, not a parcel figure

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

System cost, conventional vs. engineered

Given Lexington 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.

How Lexington County, SC compares

Nationally, Lexington County, SC is the 2,290-most-constrained of 3,058 rated counties for septic soil. Within South Carolina alone it ranks 21 of 46.

Before you act on this

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