Bellvís Wastewater Treatment Plant, Bellvís, Catalonia, Spain

The Bellvís wastewater treatment plant is located in the Pla d'Urgell region of Catalonia, Spain, serving the small municipality of Bellvís. As a secondary treatment facility, it handles wastewater from a population of about 899 residents, with a designed capacity of 2,966 cubic meters per day. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), small agglomerations like Bellvís (under 2,000 population equivalent) are required to provide appropriate treatment. Secondary treatment meets this requirement, ensuring organic matter and suspended solids are reduced before discharge. The treated effluent is discharged into local watercourses that drain into the Segre River, a major tributary of the Ebro River. The Ebro River basin supports diverse aquatic life and is an important agricultural and ecological corridor in northeastern Spain.

The plant's discharge enters the local drainage network, which flows into the Segre River and ultimately the Ebro River, the largest river in Spain by volume. The Ebro River basin supports a variety of fish species and is a key migratory route for birds. The region's Mediterranean climate means water resources are seasonally stressed, making effective wastewater treatment important for maintaining water quality in downstream ecosystems.