ST MARTIN STP Wastewater Treatment Plant, Zion Township, Minnesota

ST MARTIN STP is a municipal wastewater treatment plant located in Zion Township, Stearns County, Minnesota, United States. The facility serves a small population of 314 residents, reflecting its role in a rural community within the state's wastewater infrastructure. The plant provides secondary treatment, which is the standard level required under the U.S. Clean Water Act for municipal facilities. With a designed capacity of 189.27 units and an average daily discharge of 75.71 units, the plant operates well within its capacity, ensuring effective treatment of local wastewater. The treated effluent is discharged into a local water body, contributing to the Mississippi River basin. The plant plays a key role in protecting downstream water quality in the region's rivers and lakes, supporting aquatic life and recreational uses.

The plant discharges into a tributary of the Mississippi River, which flows south to the Gulf of Mexico. The local watershed includes agricultural and rural areas, and the plant helps reduce nutrient and pathogen loads that could impact downstream ecosystems, including the Mississippi River's diverse aquatic habitats.