Septic soil in Waushara County, WI, by the numbers

Very limited

97.4% of Waushara County, WI's surveyed soil comes back "Very limited" in USDA's own SSURGO data, the county's dominant condition for a septic absorption field. A standard gravity system routinely fails on ground like this; the same share of the county falls in USDA's worst absorption-field bucket outright. Waushara County, WI is 626.161 square miles with a population of 25,079.

What Waushara County's reading doesn't cover

USDA's survey covers the whole of Waushara County, WI 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 Waushara County will actually do.

What a system would cost here

With 97.4% of Waushara 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.

How Waushara County, WI compares

Nationally, Waushara County, WI is the 333-most-constrained of 3,058 rated counties for septic soil. Within Wisconsin alone it ranks 4 of 72.

Before you act on this

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