Berlin Twp STP - Berlin Charter Township, Michigan Wastewater Treatment Plant

Berlin Twp STP is a municipal wastewater treatment facility located in Berlin Charter Township, Monroe County, Michigan. The plant serves a population of approximately 9,164 residents and has a designed capacity of 1.00 million gallons per day, reflecting its role as a medium-sized treatment facility for this rural community. As a US-based plant, it operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Michigan Department of Environment, Great Lakes, and Energy (EGLE). For a facility of this scale, secondary treatment is typically required, with additional nutrient removal standards applicable to plants discharging into the Great Lakes basin. The plant's treated effluent ultimately reaches Lake Erie via local tributaries and drainage networks. Lake Erie is the shallowest and most biologically productive of the Great Lakes, supporting diverse aquatic life and serving as a critical freshwater resource. The plant's discharge contributes to the overall water quality management in the Lake Erie watershed, which faces challenges from nutrient loading and algal blooms.

The plant discharges into the Lake Erie basin, part of the Great Lakes system. Lake Erie is the southernmost Great Lake and supports a rich ecosystem including walleye, perch, and migratory waterfowl. The watershed is agriculturally intensive, and nutrient management is a key concern to prevent harmful algal blooms that affect drinking water and recreation.