Pinckney STP - Secondary Wastewater Treatment Plant in Pinckney, Michigan

Pinckney STP is a municipal wastewater treatment facility located in Putnam Township, Livingston County, Michigan, serving the community of Pinckney. The plant provides secondary treatment for a population of 2,141, with a designed capacity of 1,022.06 million gallons per day and an average daily discharge of 643.52 million gallons. As a secondary treatment facility, the plant meets the minimum requirements under the U.S. Clean Water Act for municipal wastewater treatment. The plant's discharge is regulated through the National Pollutant Discharge Elimination System (NPDES) permit program, administered by the Michigan Department of Environment, Great Lakes, and Energy (EGLE). The plant discharges to a local water body that flows into the Huron River, which ultimately drains to Lake Erie via the Detroit River. The Huron River watershed supports diverse aquatic life and provides recreational opportunities for the region.

The plant discharges into a tributary of the Huron River, which flows southeast through southeastern Michigan to Lake Erie. The Huron River watershed is ecologically significant, supporting species such as smallmouth bass and walleye, and providing habitat for migratory waterfowl. The river's health is important for downstream water quality in the western Lake Erie basin, which experiences seasonal algal blooms influenced by nutrient inputs.