Spencer County, KY's soil, for a septic absorption field

Very limited

87.6% of Spencer County, KY's surveyed soil comes back "Very limited" in USDA's own SSURGO data, the county's dominant condition for a septic absorption field. This is the reading that pushes a project toward an engineered system rather than a conventional one, and it covers 87.6% of Spencer County's land. Spencer County covers 186.671 square miles and counts 20,823 residents.

This is a county figure, not a parcel figure

Nothing about Spencer County, KY's SSURGO figure applies to a specific address - it's a county-wide average. A site-specific perc test, usually $750-$1,850, is what a health department will actually require before permitting a lot in Spencer County.

System cost, conventional vs. engineered

Given Spencer County's rating, plan for the engineered-system range rather than the conventional one. 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, Spencer County, KY is the 1,503-most-constrained of 3,058 rated counties for septic soil. Within Kentucky alone it ranks 72 of 119.

Related guides

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