Bacia Sul de Mangualde Wastewater Treatment Plant - Mangualde, Portugal

Bacia Sul de Mangualde is a wastewater treatment plant located in Mangualde, Viseu District, Portugal. The facility serves a population of approximately 5,000 residents, reflecting its role as a medium-sized municipal treatment works in the interior of the country. The plant employs advanced treatment processes, ensuring a high level of effluent quality. With a designed capacity of 10,000 m³/day and an average discharge volume of 833.65 m³/day, it operates well below its capacity, indicating room for future growth or seasonal variations. As a Portuguese facility, it operates under national regulations that transpose the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates appropriate treatment for agglomerations of this size. The treated effluent is discharged into the local watershed, which ultimately drains into the Atlantic Ocean via the Mondego River basin. The plant's advanced treatment helps protect downstream water quality and supports the ecological health of the region's rivers and coastal waters.

The plant discharges into the Mondego River basin, which flows westward through central Portugal before reaching the Atlantic Ocean near Figueira da Foz. The river supports diverse aquatic life and is an important corridor for migratory fish species. Advanced treatment at this facility helps reduce nutrient loading and protects the ecological balance of the downstream estuary and coastal zone.