What Freeborn County, MN's soil rates for a septic system

Very limited

Soil across 88.9% of Freeborn County, MN rates "Very limited" in USDA's septic-absorption-field interpretation. Practically, that rules out a simple gravity system for most of the county - 88.9% of it sits in USDA's most-constrained bucket. Freeborn County, MN is 707.246 square miles with a population of 30,314.

What Freeborn County's reading doesn't cover

USDA's survey covers the whole of Freeborn County, MN at once, not any single address. A local percolation test, typically $750-$1,850 (around $1,300 typical), is the only way to know what one lot in Freeborn County will actually do.

What a system would cost here

With 88.9% of Freeborn County rating "Very limited", a standard gravity system is not a safe assumption here. 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.

Freeborn County's rank among Minnesota counties

Nationally, Freeborn County, MN is the 1,381-most-constrained of 3,058 rated counties for septic soil. Within Minnesota alone it ranks 52 of 86.

Before you act on this

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