Alexander County, IL Septic Rating

Alexander County's SSURGO septic rating

Very limited

USDA puts Alexander County, IL at "Very limited" for septic absorption fields, the dominant reading across 82% of the county's soil. This is the reading that pushes a project toward an engineered system rather than a conventional one, covering that same share of Alexander County's land. The county spans 235 square miles, home to 4,594 people.

What this number does and doesn't tell you

Nothing about Alexander 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.

Alexander County: conventional vs. engineered cost

82% of Alexander 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.

Alexander County's rank among Illinois counties

Among the 3,058 rated counties on this site, Alexander County, IL ranks 1,930 most-constrained nationally, and 66 of 101 within Illinois.

Before you act on this

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