Negreira Wastewater Treatment Plant: Serving Negreira, Galicia, Spain

The Negreira wastewater treatment plant is located in the municipality of Negreira, in the province of A Coruña, Galicia, Spain. It serves a population of approximately 5,031 people, classifying it as a small agglomeration under European Union classifications. As a Spanish plant, it operates under the national transposition of the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for discharges into freshwater and estuaries from agglomerations of this size. The treated effluent is discharged into local watercourses that ultimately drain into the Tambre River basin and then into the Atlantic Ocean via the Ría de Muros e Noia. This coastal region supports diverse marine life and is important for local fisheries and tourism.

The plant discharges into the Tambre River basin, which flows into the Ría de Muros e Noia, a coastal inlet on the Atlantic Ocean. This estuary supports diverse aquatic life, including migratory fish species, and is ecologically sensitive due to its role as a nursery for marine organisms. The surrounding area is characterized by Atlantic climate conditions with high rainfall, influencing runoff and dilution capacity.