Septic suitability in Adams County, IL

Very limited

Adams County, IL: USDA's soil survey calls 78.6% of the county "Very limited" for a septic leach field. Expect the ground itself to work against a plain gravity system; USDA's strictest bucket alone covers 78.6% of the county. For scale: 855.15 square miles and 64,109 people call Adams County home.

Before you rely on this for one lot

Nothing about Adams County, IL's SSURGO figure applies to a specific address - it's a county-wide average. The real answer for one lot is still a site-specific perc test, running about $750-$1,850 (typically near $1,300).

Budgeting for a system in Adams County, IL

Adams County's soil reading pushes the likely outcome toward an engineered system rather than a conventional one. 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.

Adams County's rank among Illinois counties

Among the 3,058 rated counties on this site, Adams County, IL ranks 2,111 most-constrained nationally, and 68 of 101 within Illinois.

Before you act on this

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