Lawrence County, TN: the USDA septic-suitability picture

Very limited

Lawrence County, TN: USDA's soil survey calls 64.8% 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: 617.13 square miles and 46,467 people call Lawrence County home.

Before you rely on this for one lot

USDA's survey covers the whole of Lawrence 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 Lawrence County, TN

Lawrence 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 Lawrence County, TN compares

Among the 3,058 rated counties on this site, Lawrence County, TN ranks 2,612 most-constrained nationally, and 84 of 95 within Tennessee.

Before you act on this

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