Septic suitability in Carter County, TN

Very limited

USDA puts Carter County, TN at "Very limited" for septic absorption fields, the dominant reading across 91.3% of the county's soil. Expect the ground itself to work against a plain gravity system; USDA's strictest bucket alone covers 91.3% of the county. For scale: 341.288 square miles and 57,434 people call Carter County home.

Before you rely on this for one lot

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

Carter 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 Carter County, TN compares

Among the 3,058 rated counties on this site, Carter County, TN ranks 1,132 most-constrained nationally, and 19 of 95 within Tennessee.

Related guides

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