VASSAR STP - Vassar Township, Michigan Wastewater Treatment Plant

VASSAR STP is a municipal wastewater treatment plant located in Vassar Township, Tuscola County, Michigan. The facility serves a population of approximately 2,823 residents and has a designed capacity of 1.00 million gallons per day, reflecting its role as a small-scale treatment facility for the local community. As a plant in the United States, VASSAR STP operates under the regulatory framework of the Clean Water Act, administered by the Michigan Department of Environment, Great Lakes, and Energy (EGLE). Facilities of this size are typically required to meet secondary treatment standards through National Pollutant Discharge Elimination System (NPDES) permits, which set effluent limits to protect water quality. The plant discharges treated wastewater into a local water body that ultimately drains into the Saginaw Bay of Lake Huron, part of the Great Lakes system. This watershed supports diverse aquatic life and is an important resource for recreation and drinking water. The plant's operations contribute to protecting downstream water quality in the Saginaw Bay ecosystem.

The treated effluent from VASSAR STP flows into a tributary of the Cass River, which joins the Saginaw River and empties into Saginaw Bay, Lake Huron. This watershed is part of the larger Great Lakes basin, which provides habitat for fish species such as walleye and lake sturgeon. The area supports migratory waterfowl and is ecologically sensitive due to its role in maintaining water quality in the Great Lakes.