Los Navalmorales Wastewater Treatment Plant, Toledo, Castilla-La Mancha

Los Navalmorales wastewater treatment plant is located in the municipality of Los Navalmorales, in the province of Toledo, Castilla-La Mancha, Spain. The plant serves a population of approximately 5,051 people, classifying it as a small agglomeration under Spanish and EU regulations. The plant employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Advanced treatment typically includes nutrient removal (nitrogen and phosphorus) to protect sensitive water bodies. The plant discharges a daily volume of 900 m³ of treated wastewater. The treated effluent is discharged into a local watercourse that ultimately drains into the Tagus River basin, one of the most important river systems in the Iberian Peninsula. The Tagus River flows westward through Spain and Portugal, emptying into the Atlantic Ocean near Lisbon. The advanced treatment helps reduce nutrient loading and protect downstream aquatic ecosystems.

The plant discharges into a tributary of the Tagus River basin, which supports diverse aquatic life and provides water for agriculture and urban use. The Tagus River flows through central Spain and Portugal, with its estuary forming a vital wetland habitat for migratory birds. Advanced treatment at this plant helps minimize eutrophication risks in the river and its downstream environments.