What Bullitt County, KY's soil rates for a septic system
Very limited
Soil across 87.6% of Bullitt County, KY rates "Very limited" in USDA's septic-absorption-field interpretation. That reading means a conventional system is a poor bet here - 87.6% of Bullitt County lands in the strictest "very limited" bucket USDA uses. Bullitt County, KY is 297.088 square miles with a population of 85,802.
What Bullitt County's reading doesn't cover
Nothing about Bullitt County, KY's SSURGO figure applies to a specific address - it's a county-wide average. A local percolation test, typically $750-$1,850 (around $1,300 typical), is the only way to know what one lot in Bullitt County will actually do.
What a system would cost here
With 87.6% of Bullitt 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.
Where this sits nationally
Nationally, Bullitt County, KY is the 1,498-most-constrained of 3,058 rated counties for septic soil. Within Kentucky alone it ranks 71 of 119.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems