Tramagal Wastewater Treatment Plant, Abrantes, Portugal

Tramagal is a wastewater treatment plant located in the parish of Tramagal, within the municipality of Abrantes in the Santarém district of central Portugal. The facility serves a population of approximately 5,200 residents, providing secondary treatment to municipal wastewater from the local community. As a secondary treatment plant, Tramagal meets the standard requirements under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. The plant has a designed capacity of 5,200 cubic meters per day and treats an average daily flow of 867 cubic meters, indicating it operates well below its design capacity. The treated effluent is discharged into the Tagus River basin, which flows through central Portugal and eventually reaches the Atlantic Ocean near Lisbon. The Tagus River is a major watercourse supporting diverse aquatic life and providing water for agriculture and urban use downstream. The plant plays a key role in protecting water quality in this important river system.

The plant discharges into the Tagus River basin, one of the longest rivers in the Iberian Peninsula. The Tagus flows westward through Portugal, passing through the city of Abrantes and eventually emptying into the Atlantic Ocean at the Tagus Estuary near Lisbon. This estuary is an ecologically sensitive area that supports diverse aquatic life, including migratory fish species and waterbirds. The plant's secondary treatment helps reduce organic pollution and nutrient loads, contributing to the overall health of the river and its downstream ecosystems.