NAVAS DEL REY Wastewater Treatment Plant, Navas del Rey, Spain

NAVAS DEL REY is a wastewater treatment plant located in Navas del Rey, a municipality in the Comunidad de Madrid, Spain. The plant serves a population of approximately 1,768 people, making it a small-scale facility within the region's water management infrastructure. As a Spanish wastewater treatment plant, it operates under the national transposition of the EU Urban Waste Water Treatment Directive (91/271/EEC). For small agglomerations like this, the directive requires appropriate treatment to protect receiving waters, typically secondary treatment or equivalent, depending on the sensitivity of the discharge area. The plant's treated effluent is discharged into local watercourses that eventually drain into the Tagus River basin, one of the most important river systems in the Iberian Peninsula. The Tagus flows westward through Spain and Portugal before reaching the Atlantic Ocean near Lisbon, supporting diverse aquatic ecosystems and providing water for agriculture and urban use.

The plant discharges into the Tagus River basin, which flows through central Spain and Portugal to the Atlantic Ocean. The Tagus supports a variety of fish species, including the endangered European eel, and its estuary is a critical stopover for migratory birds. The Comunidad de Madrid region includes several sensitive areas where nutrient removal may be required to prevent eutrophication in downstream reservoirs.