What Moultrie County, IL's soil rates for a septic system

Very limited

Soil across 97% of Moultrie County, IL rates "Very limited" in USDA's septic-absorption-field interpretation. Expect the ground itself to work against a plain gravity system; USDA's strictest bucket alone covers 97% of the county. Moultrie County covers 335.958 square miles and counts 14,365 residents.

This is a county figure, not a parcel figure

USDA's survey covers the whole of Moultrie County, IL at once, not any single address. A site-specific perc test, usually $750-$1,850, is what a health department will actually require before permitting a lot in Moultrie County.

System cost, conventional vs. engineered

Given Moultrie County's rating, plan for the engineered-system range rather than the conventional one. The engineered-system range, $10,000-$40,000 (mound or aerobic treatment), is the more realistic number to plan around, against $3,000-$8,000 for a conventional system on the rare lot that passes.

Moultrie County's rank among Illinois counties

Nationally, Moultrie County, IL is the 386-most-constrained of 3,058 rated counties for septic soil. Within Illinois alone it ranks 19 of 101.

Before you act on this

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