Septic suitability in Wayne County, IL

Very limited

Wayne County, IL: USDA's soil survey calls 98.6% of the county "Very limited" for a septic leach field. Practically, that rules out a simple gravity system for most of the county - 98.6% of it sits in USDA's most-constrained bucket. The county spans 713.833 square miles, home to 15,928 people.

What this number does and doesn't tell you

Nothing about Wayne County, IL'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.

Wayne County: conventional vs. engineered cost

98.6% of Wayne 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.

Wayne County's rank among Illinois counties

Among the 3,058 rated counties on this site, Wayne County, IL ranks 155 most-constrained nationally, and 9 of 101 within Illinois.

Before you act on this

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