Septic suitability in Franklin County, TN

Very limited

Franklin County, TN: USDA's soil survey calls 54.5% of the county "Very limited" for a septic leach field. That reading means a conventional system is a poor bet here - 54.5% of Franklin County lands in the strictest "very limited" bucket USDA uses. The county spans 554.5 square miles, home to 45,137 people.

What this number does and doesn't tell you

Franklin County's rating is an average across the whole county, not a promise about any one lot inside it. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.

Franklin County: conventional vs. engineered cost

54.5% of Franklin 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.

Franklin County's rank among Tennessee counties

Among the 3,058 rated counties on this site, Franklin County, TN ranks 2,830 most-constrained nationally, and 95 of 95 within Tennessee.

Before you act on this

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