What Florence County, SC's soil rates for a septic system
Very limited
In Florence County, SC, 82% of the surveyed land carries a "Very limited" rating for a standard septic drain field. That reading means a conventional system is a poor bet here - 82% of Florence County lands in the strictest "very limited" bucket USDA uses. Florence County, SC is 800.454 square miles with a population of 138,049.
What Florence County's reading doesn't cover
Florence County's rating is an average across the whole county, not a promise about any one lot inside it. A local percolation test, typically $750-$1,850 (around $1,300 typical), is the only way to know what one lot in Florence County will actually do.
What a system would cost here
With 82% of Florence 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 Florence County, SC compares
Nationally, Florence County, SC is the 1,925-most-constrained of 3,058 rated counties for septic soil. Within South Carolina alone it ranks 17 of 46.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems