Sandstone WWTP - Kroschel Township, Minnesota Wastewater Treatment Plant

Sandstone WWTP is a municipal wastewater treatment facility located on 382nd Avenue in Kroschel Township, Kanabec County, Minnesota. It serves a population of approximately 3,109 people, placing it in the small-to-medium agglomeration category for U.S. inland plants. As a U.S. facility, Sandstone WWTP operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permitting, typically administered by the Minnesota Pollution Control Agency. For plants of this scale, secondary treatment is standard, with possible nutrient removal requirements depending on the sensitivity of the receiving water body. The plant's treated effluent discharges into the local watershed, which drains into the Snake River and eventually the St. Croix River, a tributary of the Mississippi River. This downstream chain supports diverse aquatic life and provides recreational and ecological value to the region.

Sandstone WWTP discharges into the Snake River watershed, which flows into the St. Croix River and ultimately the Mississippi River. The St. Croix River is a National Scenic Riverway, supporting diverse fish populations and migratory birds. The plant's operations help protect downstream water quality in this ecologically significant basin.