Will County's SSURGO septic rating

Very limited

Will County, IL's SSURGO dominant class comes back "Very limited", covering 96.6% of the county. That reading means a conventional system is a poor bet here - 96.6% of Will County lands in the strictest "very limited" bucket USDA uses. The county spans 835.908 square miles, home to 708,583 people.

What this number does and doesn't tell you

This is a countywide, area-weighted figure across every soil survey map unit in Will County, IL - never a reading for one specific parcel. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.

Will County: conventional vs. engineered cost

96.6% of Will 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.

Will County's rank among Illinois counties

Among the 3,058 rated counties on this site, Will County, IL ranks 425 most-constrained nationally, and 20 of 101 within Illinois.

Before you act on this

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