Septic suitability in Sumter County, AL
Very limited
Sumter County, AL: USDA's soil survey calls 95.2% of the county "Very limited" for a septic leach field. Practically, that rules out a simple gravity system for most of the county - 95.2% of it sits in USDA's most-constrained bucket. For scale: 903.826 square miles and 11,607 people call Sumter County home.
Before you rely on this for one lot
Nothing about Sumter County, AL's SSURGO figure applies to a specific address - it's a county-wide average. 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 Sumter County, AL
Sumter 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, Sumter County, AL ranks 653 most-constrained nationally, and 5 of 67 within Alabama.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems