Septic suitability in Chisago County, MN
Very limited
Chisago County, MN's SSURGO dominant class comes back "Very limited", covering 90.8% of the county. Expect the ground itself to work against a plain gravity system; USDA's strictest bucket alone covers 90.8% of the county. The county spans 414.903 square miles, home to 59,105 people.
What this number does and doesn't tell you
Two lots a mile apart in Chisago County can carry different soil, even though they share one countywide rating. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.
Chisago County: conventional vs. engineered cost
90.8% of Chisago County carrying a "Very limited" reading changes the realistic budget here. 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 Chisago County, MN compares
Among the 3,058 rated counties on this site, Chisago County, MN ranks 1,182 most-constrained nationally, and 41 of 86 within Minnesota.
Before you act on this
How this rating is built, and its real limits · Conventional vs. engineered septic systems