Sabroso de Aguiar Wastewater Treatment Plant, Vila Pouca de Aguiar, Portugal

Sabroso de Aguiar is a wastewater treatment plant located in the civil parish of Bornes de Aguiar, serving the municipality of Vila Pouca de Aguiar in the Vila Real district of northern Portugal. The plant treats domestic wastewater from a population of approximately 6,500 people, reflecting a small to medium agglomeration under Portuguese and EU classifications. As a Portuguese facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size discharging into freshwater. The regulatory framework ensures compliance with national standards set by the Portuguese Environment Agency (APA). The treated effluent is discharged into a local watercourse that feeds into the Corgo River, a tributary of the Douro River. The Douro River flows westward through the Douro Valley, a region known for its vineyards and biodiversity, before reaching the Atlantic Ocean near Porto. The plant plays a key role in protecting the local watershed and downstream aquatic ecosystems.

The plant discharges into a small watercourse that drains into the Corgo River, a tributary of the Douro River. The Douro River basin supports diverse aquatic life and is an important ecological corridor in northern Portugal. The Douro eventually reaches the Atlantic Ocean, where its estuary provides critical habitat for migratory fish and bird species. The plant's operation helps maintain water quality in this sensitive river system.