Nobles County, MN's soil, for a septic absorption field

Very limited

95.6% of Nobles County, MN's surveyed soil comes back "Very limited" in USDA's own SSURGO data, the county's dominant condition for a septic absorption field. This is the reading that pushes a project toward an engineered system rather than a conventional one, and it covers 95.6% of Nobles County's land. Nobles County, MN is 715.117 square miles with a population of 21,969.

What Nobles County's reading doesn't cover

USDA's survey covers the whole of Nobles 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 Nobles County will actually do.

What a system would cost here

With 95.6% of Nobles 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.

How Nobles County, MN compares

Nationally, Nobles County, MN is the 582-most-constrained of 3,058 rated counties for septic soil. Within Minnesota alone it ranks 22 of 86.

Further reading

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