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

Very limited

Soil across 95.3% of Monroe County, WI rates "Very limited" in USDA's septic-absorption-field interpretation. This is the reading that pushes a project toward an engineered system rather than a conventional one, and it covers 95.3% of Monroe County's land. Monroe County covers 900.904 square miles and counts 46,370 residents.

This is a county figure, not a parcel figure

This is a countywide, area-weighted figure across every soil survey map unit in Monroe County, WI - never a reading for one specific parcel. A site-specific perc test, usually $750-$1,850, is what a health department will actually require before permitting a lot in Monroe County.

System cost, conventional vs. engineered

Given Monroe County's rating, plan for the engineered-system range rather than the conventional one. 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 Monroe County, WI compares

Nationally, Monroe County, WI is the 628-most-constrained of 3,058 rated counties for septic soil. Within Wisconsin alone it ranks 15 of 72.

Further reading

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