MSD Grand Glaize WWTF, Valley Park

Overview

MSD Grand Glaize WWTF serves Valley Park, Missouri, treating wastewater for approximately 86,686 people. The plant operates under the U. S. Clean Water Act via Missouri's NPDES permitting program.

MSD Grand Glaize WWTF is a municipal wastewater treatment facility located in Valley Park, Missouri, within the Meramec River watershed. Serving a population of around 86,686, the plant is part of the Metropolitan St. Louis Sewer District's infrastructure, managing wastewater from the surrounding suburban area. Under the U. S. Clean Water Act, plants of this scale are 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 protect water quality. The plant's treated effluent discharges into the Meramec River, a major tributary of the Mississippi River. The Meramec River supports diverse aquatic life and is used for recreation. Downstream, the Mississippi River carries the flow to the Gulf of Mexico, where nutrient loading contributes to the hypoxic zone.

Environmental context

The plant discharges into the Meramec River, which flows into the Mississippi River and ultimately the Gulf of Mexico. The Meramec River watershed is ecologically significant, supporting fish species like smallmouth bass and providing habitat for freshwater mussels. Downstream nutrient contributions can affect the Gulf's hypoxic zone, making nutrient management important.

Frequently asked questions

The plant is located at 708 Meramec Greenway in Valley Park, Missouri, within Saint Louis County.

The plant serves approximately 86,686 people in the Valley Park area and surrounding communities.

Treated effluent is discharged into the Meramec River, a tributary of the Mississippi River, which flows to the Gulf of Mexico.

The plant operates under the U. S. Clean Water Act, with NPDES permits issued by the Missouri Department of Natural Resources, requiring secondary treatment and effluent limits.

Plants of this scale typically use secondary treatment processes such as activated sludge or trickling filters, with disinfection, to meet NPDES permit limits.