MARQUETTE WWTP - Marquette, Michigan Wastewater Treatment Plant

MARQUETTE WWTP is a municipal wastewater treatment facility serving the city of Marquette, Michigan, located in the Upper Peninsula along the southern shore of Lake Superior. The plant serves a population of around 24,099, placing it in the medium-sized agglomeration category for U.S. facilities. Its location near the Great Lakes makes it subject to stringent discharge requirements to protect water quality. As a U.S. wastewater treatment plant, MARQUETTE WWTP operates under the National Pollutant Discharge Elimination System (NPDES) permit program, administered by the Michigan Department of Environment, Great Lakes, and Energy (EGLE). The Clean Water Act requires secondary treatment for municipal plants, and facilities serving populations over 10,000 typically have advanced treatment to meet phosphorus limits and other Great Lakes-specific standards. The plant's designed capacity is 1.00 million gallons per day, indicating it is sized for its service area. The plant's treated effluent is discharged into waters that ultimately flow into Lake Superior, the largest of the Great Lakes. Lake Superior is a vital freshwater resource with sensitive aquatic ecosystems, including native fish species and cold-water habitats. Protecting this watershed is critical for regional water quality, recreation, and drinking water supplies for downstream communities.

MARQUETTE WWTP discharges into the Lake Superior basin, the world's largest freshwater lake by surface area. The lake supports diverse aquatic life, including lake trout, whitefish, and other cold-water species. As part of the Great Lakes system, the plant's discharge must meet strict phosphorus and nutrient limits to prevent eutrophication and algal blooms. The watershed is also important for migratory birds and provides drinking water for millions of people.