Overview
Baltar wastewater treatment plant serves Paredes, Portugal, treating municipal wastewater for approximately 10,000 people. The facility discharges into the local watershed within the Douro River basin.
Baltar wastewater treatment plant is located in the parish of Baltar, in the municipality of Paredes, Porto district, Portugal. The facility serves a population equivalent of approximately 10,000, classifying it as a small to medium agglomeration under Portuguese and EU regulations. The plant is situated inland, away from the coast, and its operations are part of the regional sanitation infrastructure managed by the Águas do Norte or similar entity. As a Portuguese wastewater treatment plant, Baltar operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size discharging into freshwater or estuaries. The directive also mandates more advanced treatment if the receiving waters are designated as sensitive areas. The plant's designed capacity is 1.00 (likely in thousands of cubic meters per day or similar unit), indicating it is sized to handle the local load. The treated effluent from Baltar is discharged into a local watercourse that ultimately flows into the Douro River, one of the major rivers of the Iberian Peninsula. The Douro River drains into the Atlantic Ocean at Porto, supporting diverse aquatic life and serving as an important ecological corridor. The plant's operations help protect water quality in the Douro basin, which is vital for downstream communities, agriculture, and ecosystems.
Environmental context
The Baltar plant discharges into a tributary of the Douro River, which flows westward through northern Portugal to the Atlantic Ocean near Porto. The Douro basin supports a variety of freshwater species and is an important migratory route for fish such as the European eel. The region's climate is Mediterranean with Atlantic influence, leading to seasonal variations in river flow that affect dilution capacity. Protecting water quality in this watershed is essential for maintaining ecological balance and supporting downstream uses including agriculture and recreation.
Frequently asked questions
The Baltar wastewater treatment plant is located at Rua da Presa, Ramos, in the parish of Baltar, municipality of Paredes, Porto district, Portugal.
The Baltar WWTP serves a population equivalent of approximately 10,000 people, classifying it as a small to medium agglomeration under EU regulations.
The treated effluent from Baltar is discharged into a local watercourse that flows into the Douro River, which eventually reaches the Atlantic Ocean near Porto.
As a Portuguese plant, Baltar operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size and may require tertiary treatment if the receiving waters are sensitive.
Under the EU Urban Waste Water Treatment Directive, plants serving between 2,000 and 15,000 population equivalent are generally required to have secondary treatment, unless the receiving waters are designated as sensitive areas, which may necessitate more advanced treatment.
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