Peoria County, IL Septic Rating
Septic suitability in Peoria County, IL
Very limited
USDA puts Peoria County, IL at "Very limited" for septic absorption fields, the dominant reading across 61.1% of the county's soil. Expect the ground itself to work against a plain gravity system; that share is already USDA's strictest bucket, not a lesser constraint layered on top. The county spans 619 square miles, home to 179,630 people.
What this number does and doesn't tell you
Nothing about Peoria 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.
Peoria County: conventional vs. engineered cost
61.1% of Peoria 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.
How Peoria County, IL compares
Among the 3,058 rated counties on this site, Peoria County, IL ranks 2,705 most-constrained nationally, and 91 of 101 within Illinois.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems