East China Reg CS Wastewater Treatment Plant, East China Charter Township, Michigan

East China Reg CS is a wastewater treatment plant located in East China Charter Township, Saint Clair County, Michigan. The plant serves a population of 3,630 residents and has a designed capacity of 1.00 million gallons per day, indicating it is a small-scale facility serving a rural or suburban community. As a US-based plant, it operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permitting, typically administered by the Michigan Department of Environment, Great Lakes, and Energy (EGLE). For plants of this size, secondary treatment is standard, and permits specify effluent limits to protect receiving waters. The plant's treated effluent likely discharges into a local waterway within the St. Clair River watershed, which flows into Lake St. Clair and ultimately the Great Lakes system. This region supports diverse aquatic life and is important for recreational and commercial fishing, making effective wastewater treatment critical for water quality.

The plant is located inland, more than 50 km from the coast, and its discharge likely enters a tributary of the St. Clair River. The St. Clair River connects Lake Huron to Lake St. Clair, part of the Great Lakes system, which provides drinking water to millions and supports a rich ecosystem. Protecting this watershed from nutrient pollution and pathogens is essential for maintaining water quality in the Great Lakes.