Minde_Mira de Aire Wastewater Treatment Plant, Minde, Portugal

The Minde_Mira de Aire wastewater treatment plant is located in Minde, in the Santarém district of central Portugal. It serves a population of approximately 11,000, classifying it as a medium agglomeration under EU regulations. The plant is situated inland, away from coastal areas, and its operations are part of the regional wastewater infrastructure managed by local authorities. As a facility serving between 10,000 and 150,000 people, the plant is subject to the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires secondary treatment as a minimum standard. The designed capacity is 1.00 (likely in thousands of cubic meters per day), indicating a facility sized to handle the community's wastewater load. The regulatory framework ensures compliance with discharge standards. The plant discharges treated effluent into a local watercourse that eventually drains into the Tagus River basin, one of the major Iberian river systems. The Tagus flows westward through Portugal and empties into the Atlantic Ocean near Lisbon. The plant plays a key role in protecting the local watershed and downstream aquatic ecosystems from untreated sewage.

The plant's treated effluent enters a tributary of the Tagus River, which flows through central Portugal and discharges into the Atlantic Ocean near Lisbon. The Tagus estuary is an ecologically sensitive area that supports diverse aquatic life, including migratory fish species. The plant's operation helps maintain water quality in this important river system, reducing nutrient and pathogen loads that could otherwise impact downstream habitats.