MENASALBAS Wastewater Treatment Plant, Menasalbas, Castilla-La Mancha, Spain

The MENASALBAS wastewater treatment plant is located in the town of Menasalbas, in the province of Toledo, within the autonomous community of Castilla-La Mancha, Spain. The plant serves a population of approximately 6,188 residents and operates with advanced treatment processes, ensuring high-quality effluent. As an advanced treatment facility, MENASALBAS goes beyond secondary treatment to remove nutrients and other pollutants, meeting stringent standards under Spanish and EU regulations. The plant is part of Spain's compliance with the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires appropriate treatment for agglomerations of this size, especially in sensitive areas. The treated wastewater is discharged into local watercourses that flow into the Tagus River basin, one of the most important river systems in the Iberian Peninsula. The Tagus River ultimately drains into the Atlantic Ocean near Lisbon, Portugal. The plant's advanced treatment helps protect downstream ecosystems and water quality in this transboundary basin.

The plant discharges into the Tagus River basin, which flows westward through Spain and Portugal to the Atlantic Ocean. The Tagus supports diverse aquatic life and provides water for agriculture, industry, and drinking water for millions of people. Advanced treatment at MENASALBAS reduces nutrient loading, helping to prevent eutrophication in downstream reservoirs and the river's estuary.