Lake County, IN's soil, for a septic absorption field

Very limited

84.2% of Lake County, IN's surveyed soil comes back "Very limited" in USDA's own SSURGO data, the county's dominant condition for a septic absorption field. That reading means a conventional system is a poor bet here - 84.2% of Lake County lands in the strictest "very limited" bucket USDA uses. Lake County covers 498.884 square miles and counts 502,955 residents.

This is a county figure, not a parcel figure

USDA's survey covers the whole of Lake County, IN 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 Lake County.

System cost, conventional vs. engineered

Given Lake 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.

Where this sits nationally

Nationally, Lake County, IN is the 1,759-most-constrained of 3,058 rated counties for septic soil. Within Indiana alone it ranks 74 of 90.

Related guides

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