Septic soil in Lumpkin County, GA, by the numbers
Very limited
93.1% of Lumpkin County, GA's surveyed soil comes back "Very limited" in USDA's own SSURGO data, the county's dominant condition for a septic absorption field. Practically, that rules out a simple gravity system for most of the county - 93.1% of it sits in USDA's most-constrained bucket. Lumpkin County, GA is 281.433 square miles with a population of 36,016.
What Lumpkin County's reading doesn't cover
Two lots a mile apart in Lumpkin 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 Lumpkin County will actually do.
What a system would cost here
With 93.1% of Lumpkin 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.
Lumpkin County's rank among Georgia counties
Nationally, Lumpkin County, GA is the 911-most-constrained of 3,058 rated counties for septic soil. Within Georgia alone it ranks 25 of 159.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems