Sullivan County, TN's soil, for a septic absorption field

Very limited

In Sullivan County, TN, 80.9% of the surveyed land carries a "Very limited" rating for a standard septic drain field. This is the reading that pushes a project toward an engineered system rather than a conventional one, and it covers 80.9% of Sullivan County's land. Sullivan County, TN is 413.545 square miles with a population of 162,703.

What Sullivan County's reading doesn't cover

Two lots a mile apart in Sullivan County can carry different soil, even though they share one countywide rating. A local percolation test, typically $750-$1,850 (around $1,300 typical), is the only way to know what one lot in Sullivan County will actually do.

What a system would cost here

With 80.9% of Sullivan County rating "Very limited", a standard gravity system is not a safe assumption here. The engineered-system range, $10,000-$40,000 (mound or aerobic treatment), is the more realistic number to plan around, against $3,000-$8,000 for a conventional system on the rare lot that passes.

How Sullivan County, TN compares

Nationally, Sullivan County, TN is the 1,993-most-constrained of 3,058 rated counties for septic soil. Within Tennessee alone it ranks 52 of 95.

Before you act on this

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