SO COASTAL STP - Sussex County, Delaware Wastewater Treatment Plant

SO COASTAL STP is a municipal wastewater treatment facility located in Sussex County, Delaware, United States. It serves a population of approximately 80,249, classifying it as a medium-to-large agglomeration under US regulatory frameworks. The plant is situated within 50 kilometers of the Atlantic coast, placing it in a coastal zone with potential environmental sensitivity. As a US facility, the plant operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Delaware Department of Natural Resources and Environmental Control. For a plant of this scale, secondary treatment is typically required, with possible additional nutrient removal standards due to its coastal location and the Chesapeake Bay watershed context. The designed capacity is reported at 1. The plant's treated effluent likely discharges into local waterways that drain into the Atlantic Ocean, potentially affecting coastal ecosystems such as the Delaware Bay and nearby estuaries. These waters support diverse aquatic life, including fish, shellfish, and migratory birds, and are important for regional fisheries and recreation. Proper treatment is essential to protect water quality and marine habitats.

SO COASTAL STP is located in Sussex County, Delaware, within the Atlantic coastal watershed. Treated effluent likely flows into local streams and rivers that drain into the Delaware Bay or directly into the Atlantic Ocean. The receiving waters support ecologically sensitive habitats, including salt marshes and estuaries that serve as nurseries for fish and shellfish and as stopover sites for migratory birds. Nutrient loading from wastewater can contribute to eutrophication, making advanced treatment important for protecting these coastal ecosystems.