Polk County's SSURGO septic rating

Very limited

Polk County, MN: USDA's soil survey calls 89.7% of the county "Very limited" for a septic leach field. Expect the ground itself to work against a plain gravity system; USDA's strictest bucket alone covers 89.7% of the county. For scale: 1,970.996 square miles and 30,413 people call Polk County home.

Before you rely on this for one lot

Nothing about Polk County, MN's SSURGO figure applies to a specific address - it's a county-wide average. 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 Polk County, MN

Polk 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.

How Polk County, MN compares

Among the 3,058 rated counties on this site, Polk County, MN ranks 1,303 most-constrained nationally, and 47 of 86 within Minnesota.

Related guides

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