Septic soil in Calloway County, KY, by the numbers

Very limited

81.5% of Calloway 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. Expect the ground itself to work against a plain gravity system; USDA's strictest bucket alone covers 81.5% of the county. Calloway County covers 384.863 square miles and counts 38,975 residents.

This is a county figure, not a parcel figure

Calloway County's rating is an average across the whole county, not a promise about any one lot inside it. A site-specific perc test, usually $750-$1,850, is what a health department will actually require before permitting a lot in Calloway County.

System cost, conventional vs. engineered

Given Calloway 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.

Calloway County's rank among Kentucky counties

Nationally, Calloway County, KY is the 1,965-most-constrained of 3,058 rated counties for septic soil. Within Kentucky alone it ranks 86 of 119.

Related guides

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