Douglas County, WI Septic Rating
Septic suitability in Douglas County, WI
Very limited
Douglas County, WI: USDA's soil survey calls 93% of the county "Very limited" for a septic leach field. This is the reading that pushes a project toward an engineered system rather than a conventional one, covering that same share of Douglas County's land. The county spans 1,304 square miles, home to 44,276 people.
What this number does and doesn't tell you
Nothing about Douglas County, WI's SSURGO figure applies to a specific address - it's a county-wide average. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.
Douglas County: conventional vs. engineered cost
93% of Douglas 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.
Where this sits nationally
Among the 3,058 rated counties on this site, Douglas County, WI ranks 926 most-constrained nationally, and 26 of 72 within Wisconsin.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems