Wilcox County, AL: the USDA septic-suitability picture
Very limited
Wilcox County, AL: USDA's soil survey calls 91.7% of the county "Very limited" for a septic leach field. Practically, that rules out a simple gravity system for most of the county - 91.7% of it sits in USDA's most-constrained bucket. For scale: 887.858 square miles and 9,865 people call Wilcox County home.
Before you rely on this for one lot
Two lots a mile apart in Wilcox County can carry different soil, even though they share one countywide rating. 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 Wilcox County, AL
Wilcox 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.
How Wilcox County, AL compares
Among the 3,058 rated counties on this site, Wilcox County, AL ranks 1,085 most-constrained nationally, and 12 of 67 within Alabama.
Before you act on this
How this rating is built, and its real limits · Conventional vs. engineered septic systems