Wabaunsee County, KS: the USDA septic-suitability picture
Very limited
USDA puts Wabaunsee County, KS at "Very limited" for septic absorption fields, the dominant reading across 98.5% of the county's soil. This is the reading that pushes a project toward an engineered system rather than a conventional one, and it covers 98.5% of Wabaunsee County's land. The county spans 794.336 square miles, home to 7,112 people.
What this number does and doesn't tell you
Wabaunsee County's rating is an average across the whole county, not a promise about any one lot inside it. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.
Wabaunsee County: conventional vs. engineered cost
98.5% of Wabaunsee County carrying a "Very limited" reading changes the realistic budget here. Conventional systems run $3,000-$8,000 where they pass; where they don't, engineered alternatives (mound or aerobic treatment, whichever the health department requires) run $10,000-$40,000 - budget toward the higher figure until a perc test says otherwise.
Wabaunsee County's rank among Kansas counties
Among the 3,058 rated counties on this site, Wabaunsee County, KS ranks 178 most-constrained nationally, and 18 of 105 within Kansas.
Before you act on this
How this rating is built, and its real limits · Conventional vs. engineered septic systems