CLARK TWP STP - Clark Township, Michigan Wastewater Treatment Plant

CLARK TWP STP is a municipal wastewater treatment plant located in Clark Township, Mackinac County, Michigan, United States. The plant serves a small population of 440 residents and treats wastewater to secondary treatment standards. The plant has a designed capacity of 302.83 megaliters and discharges 264.98 megaliters of treated wastewater annually. As a secondary treatment facility, it meets the minimum requirements under the US Clean Water Act for municipal wastewater treatment, which mandates secondary treatment for all publicly owned treatment works. The plant is situated within 10 km of the coast, likely discharging into the St. Marys River or Lake Huron system. Its location in the Great Lakes Basin means the treated effluent enters a sensitive freshwater ecosystem that supports diverse aquatic life and provides drinking water for millions.

The plant discharges into the St. Marys River, which flows from Lake Superior to Lake Huron, part of the Great Lakes system. This watershed is ecologically sensitive, supporting diverse fish populations and migratory birds. The Great Lakes are a critical freshwater resource, and any nutrient or pollutant loading from wastewater can impact water quality and aquatic habitats.