MSD Fenton WWTP - Wastewater Treatment Plant in Fenton, Missouri

MSD Fenton WWTP is a municipal wastewater treatment facility located in Fenton, Missouri, serving a population of approximately 59,599. The plant is operated by the Metropolitan St. Louis Sewer District (MSD), which manages wastewater for the St. Louis region. As a medium-sized agglomeration, the facility plays a key role in protecting local water quality. Under the U.S. Clean Water Act, wastewater treatment plants of this scale are typically required to meet secondary treatment standards through National Pollutant Discharge Elimination System (NPDES) permits issued by the Missouri Department of Natural Resources. These permits set effluent limits for biochemical oxygen demand, total suspended solids, and other pollutants to ensure compliance with water quality standards. The plant discharges treated effluent into the Meramec River watershed, which flows into the Mississippi River and ultimately to the Gulf of Mexico. The Meramec River supports diverse aquatic life and is an important recreational resource for the region. Proper treatment at this facility helps reduce nutrient and pollutant loads that could contribute to hypoxia in the Gulf.

The plant's treated effluent enters the Meramec River, a major tributary of the Mississippi River. The Meramec River basin supports a variety of fish and wildlife, including several species of freshwater mussels. Downstream, the Mississippi River carries the flow to the Gulf of Mexico, where nutrient pollution from the Mississippi basin contributes to seasonal hypoxic zones. Effective wastewater treatment at MSD Fenton WWTP helps mitigate this regional environmental challenge.