Stillwater V STP - Secondary Wastewater Treatment Plant in Village of Stillwater, New York

Stillwater V STP is a municipal wastewater treatment plant located at 808 Hudson Avenue in the Village of Stillwater, New York. The plant serves a population of approximately 1,770 residents in this Saratoga County community. It operates under the regulatory framework of the US Clean Water Act, which requires secondary treatment for municipal discharges to protect water quality. The plant provides secondary treatment, which is the standard level for facilities of this scale under the National Pollutant Discharge Elimination System (NPDES). With a designed capacity of 1,930.55 million gallons per day and an average daily discharge of 851.72 million gallons, the plant operates well within its capacity. This treatment level effectively removes organic matter and suspended solids before discharge. The treated effluent from Stillwater V STP flows into the Hudson River watershed, eventually reaching the Atlantic Ocean. The plant plays a key role in protecting the Hudson River estuary, which supports diverse aquatic life and serves as a critical migratory corridor for fish species. By maintaining secondary treatment standards, the facility helps preserve water quality in this ecologically significant region.

The plant discharges into the Hudson River basin, which flows south to New York Harbor and the Atlantic Ocean. The Hudson River estuary is a vital ecosystem supporting diverse fish, birds, and plant life, including migratory species such as striped bass and American shad. The plant's secondary treatment helps reduce nutrient and pollutant loads, contributing to the health of this important waterway.