Clark County, WI: the USDA septic-suitability picture

Very limited

Clark County, WI: USDA's soil survey calls 99.1% of the county "Very limited" for a septic leach field. That reading means a conventional system is a poor bet here - 99.1% of Clark County lands in the strictest "very limited" bucket USDA uses. For scale: 1,209.698 square miles and 34,801 people call Clark County home.

Before you rely on this for one lot

Two lots a mile apart in Clark County can carry different soil, even though they share one countywide rating. The real answer for one lot is still a site-specific perc test, running about $750-$1,850 (typically near $1,300).

Budgeting for a system in Clark County, WI

Clark County's soil reading pushes the likely outcome toward an engineered system rather than a conventional one. 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.

Clark County's rank among Wisconsin counties

Among the 3,058 rated counties on this site, Clark County, WI ranks 77 most-constrained nationally, and 1 of 72 within Wisconsin.

Before you act on this

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