MARSHALL WWTF | Wastewater Treatment Plant in Marshall, Minnesota

MARSHALL WWTF is a municipal wastewater treatment facility located at 601 Erie Road in Marshall, Minnesota, serving an estimated population of 13,860. The plant is situated in the Marshall East Industrial Park and plays a key role in managing the city's wastewater within the Minnesota River Basin. As a US facility, the plant 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 a community of this size, secondary treatment is the standard requirement, with potential additional nutrient removal standards given the sensitivity of the Mississippi River watershed. The plant's treated effluent discharges into a local waterway that ultimately drains into the Minnesota River, a tributary of the Mississippi River. This downstream connection places the plant within a large and ecologically significant watershed that supports diverse aquatic life and flows into the Gulf of Mexico, where nutrient loading is a concern.

The plant's discharge enters a tributary of the Minnesota River, which flows into the Mississippi River and eventually reaches the Gulf of Mexico. This watershed is part of the larger Mississippi River Basin, a critical migratory corridor for birds and fish. Nutrient management is particularly important here due to the hypoxic zone in the Gulf, making effective treatment essential for downstream water quality.