Septic suitability in Edwards County, IL

Very limited

USDA puts Edwards County, IL at "Very limited" for septic absorption fields, the dominant reading across 95.6% of the county's soil. That reading means a conventional system is a poor bet here - 95.6% of Edwards County lands in the strictest "very limited" bucket USDA uses. For scale: 222.4 square miles and 5,984 people call Edwards County home.

Before you rely on this for one lot

USDA's survey covers the whole of Edwards County, IL at once, not any single address. 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 Edwards County, IL

Edwards 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.

Where this sits nationally

Among the 3,058 rated counties on this site, Edwards County, IL ranks 586 most-constrained nationally, and 28 of 101 within Illinois.

Further reading

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