What Winnebago County, WI's soil rates for a septic system

Very limited

In Winnebago County, WI, 70.4% of the surveyed land carries a "Very limited" rating for a standard septic drain field. Practically, that rules out a simple gravity system for most of the county - 70.4% of it sits in USDA's most-constrained bucket. Winnebago County, WI is 434.697 square miles with a population of 173,307.

What Winnebago County's reading doesn't cover

Nothing about Winnebago County, WI'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 Winnebago County will actually do.

What a system would cost here

With 70.4% of Winnebago 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.

Winnebago County's rank among Wisconsin counties

Nationally, Winnebago County, WI is the 2,447-most-constrained of 3,058 rated counties for septic soil. Within Wisconsin alone it ranks 70 of 72.

Before you act on this

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