LEMOYNE BORO STP - Lemoyne, Pennsylvania Wastewater Treatment Plant

LEMOYNE BORO STP is a municipal wastewater treatment plant located in Lemoyne, Pennsylvania, serving a population of about 11,600. The facility is situated in Cumberland County, within the Susquehanna River watershed, which ultimately drains into the Chesapeake Bay. As a plant serving a medium-sized agglomeration, it operates under the U.S. Clean Water Act, which requires secondary treatment as a minimum standard. The National Pollutant Discharge Elimination System (NPDES) permit program governs its discharge, ensuring compliance with water quality standards set by the Pennsylvania Department of Environmental Protection. The plant's treated effluent flows into the Susquehanna River, a major tributary of the Chesapeake Bay. This bay is the largest estuary in the United States and supports diverse aquatic life, including blue crabs, striped bass, and oysters. Nutrient removal from wastewater is critical to reducing eutrophication in the bay.

The plant discharges into the Susquehanna River, which flows south through Pennsylvania and Maryland before emptying into the Chesapeake Bay. The bay is a vital ecological and economic resource, supporting commercial fisheries and migratory birds. Nutrient pollution from wastewater can contribute to algal blooms and hypoxia, making effective treatment essential for downstream ecosystem health.