Trousdale County's SSURGO septic rating

Very limited

Trousdale County, TN: USDA's soil survey calls 79.5% of the county "Very limited" for a septic leach field. A standard gravity system routinely fails on ground like this; the same share of the county falls in USDA's worst absorption-field bucket outright. For scale: 114.342 square miles and 12,159 people call Trousdale County home.

Before you rely on this for one lot

USDA's survey covers the whole of Trousdale County, TN at once, not any single address. 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 Trousdale County, TN

Trousdale 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 Trousdale County, TN compares

Among the 3,058 rated counties on this site, Trousdale County, TN ranks 2,063 most-constrained nationally, and 57 of 95 within Tennessee.

Before you act on this

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