BATRES Wastewater Treatment Plant, Batres, Comunidad de Madrid, Spain

BATRES is a wastewater treatment plant located in Batres, a municipality in the Comunidad de Madrid, Spain. The plant serves a small population of 640 residents and is part of the region's wastewater infrastructure. It is situated inland, away from coastal areas, and operates under Spain's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC). As a secondary treatment facility, BATRES provides biological treatment to remove organic matter and suspended solids. The plant has a designed capacity of 2,000 m³/day, with a current discharge volume of 158.15 m³/day, indicating it operates well below its capacity. For small agglomerations like Batres, the EU directive requires appropriate treatment to protect receiving waters. The treated effluent from BATRES is discharged into a local watercourse that ultimately drains into the Tagus River basin, which flows through central Spain and into Portugal before reaching the Atlantic Ocean near Lisbon. The Tagus basin supports diverse aquatic life and is an important ecological corridor in the Iberian Peninsula.

BATRES discharges treated wastewater into a local tributary within the Tagus River basin. The Tagus River is the longest river in the Iberian Peninsula, flowing through Spain and Portugal to the Atlantic Ocean. The basin supports a variety of aquatic species and provides habitat for migratory birds. Downstream ecosystems rely on good water quality, making secondary treatment essential for protecting biodiversity and meeting EU water quality standards.