Lock Haven City STP - Municipal Wastewater Treatment in Lock Haven, Pennsylvania

Lock Haven City STP is a municipal wastewater treatment plant located in Lock Haven, Clinton County, Pennsylvania. It serves a population of about 29,859 people, placing it in the medium-sized agglomeration category for U.S. facilities. As a U.S. plant, it operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permitting, typically administered by the Pennsylvania Department of Environmental Protection. For plants serving this population size, secondary treatment is the minimum standard, with potential nutrient removal requirements depending on the receiving water body's sensitivity. The plant discharges into the West Branch Susquehanna River, which flows into the Susquehanna River and ultimately reaches the Chesapeake Bay. The Chesapeake Bay watershed is a large estuary system with significant nutrient pollution concerns, making nutrient removal at upstream plants important for bay health.

The plant discharges into the West Branch Susquehanna River, a major tributary of the Susquehanna River, which flows into the Chesapeake Bay. The Chesapeake Bay is the largest estuary in the United States and is ecologically sensitive to nutrient loading, particularly nitrogen and phosphorus. The plant's location in the Susquehanna basin means its effluent contributes to downstream water quality, with implications for aquatic life and recreational uses in the river and bay.