Coffey County, KS's soil, for a septic absorption field

Very limited

Soil across 95.2% of Coffey County, KS rates "Very limited" in USDA's septic-absorption-field interpretation. That reading means a conventional system is a poor bet here - 95.2% of Coffey County lands in the strictest "very limited" bucket USDA uses. Coffey County, KS is 626.885 square miles with a population of 8,301.

What Coffey County's reading doesn't cover

USDA's survey covers the whole of Coffey County, KS at once, not any single address. A local percolation test, typically $750-$1,850 (around $1,300 typical), is the only way to know what one lot in Coffey County will actually do.

What a system would cost here

With 95.2% of Coffey 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.

Coffey County's rank among Kansas counties

Nationally, Coffey County, KS is the 655-most-constrained of 3,058 rated counties for septic soil. Within Kansas alone it ranks 33 of 105.

Before you act on this

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