Septic suitability in Putnam County, TN

Very limited

Putnam County, TN: USDA's soil survey calls 73.6% of the county "Very limited" for a septic leach field. Expect the ground itself to work against a plain gravity system; USDA's strictest bucket alone covers 73.6% of the county. The county spans 401.106 square miles, home to 84,894 people.

What this number does and doesn't tell you

This is a countywide, area-weighted figure across every soil survey map unit in Putnam County, TN - never a reading for one specific parcel. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.

Putnam County: conventional vs. engineered cost

73.6% of Putnam County carrying a "Very limited" reading changes the realistic budget here. 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, Putnam County, TN ranks 2,341 most-constrained nationally, and 70 of 95 within Tennessee.

Before you act on this

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