Banks County's SSURGO septic rating
Very limited
Banks County, GA: USDA's soil survey calls 50.5% 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. The county spans 232.657 square miles, home to 20,318 people.
What this number does and doesn't tell you
This is a countywide, area-weighted figure across every soil survey map unit in Banks County, GA - 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.
Banks County: conventional vs. engineered cost
50.5% of Banks 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.
Banks County's rank among Georgia counties
Among the 3,058 rated counties on this site, Banks County, GA ranks 2,874 most-constrained nationally, and 104 of 159 within Georgia.
Further reading
How this rating is built, and its real limits · Conventional vs. engineered septic systems