Valdeavero Wastewater Treatment Plant, Comunidad de Madrid, Spain

The Valdeavero wastewater treatment plant is located in the Comunidad de Madrid, Spain, serving the municipality of Valdeavero. It is a secondary treatment facility designed to handle a capacity of 4,000 m³/day, with an average discharge volume of 357.01 m³/day. The plant serves a population of approximately 1,676 residents, reflecting its role in managing local domestic wastewater. As a secondary treatment plant, Valdeavero employs biological processes to reduce organic matter and suspended solids, meeting the standards required under Spanish and European Union regulations. The EU Urban Waste Water Treatment Directive (91/271/EEC) mandates secondary treatment for agglomerations of this size, ensuring compliance with environmental quality standards. The treated effluent is discharged into local watercourses that ultimately drain into the Tagus River basin, a major hydrological system in central Spain. The Tagus River flows westward into Portugal and discharges into the Atlantic Ocean near Lisbon. The plant's operation helps protect downstream water quality and supports the ecological health of the Tagus basin.

The Valdeavero plant discharges into the Tagus River basin, which flows through central Spain and Portugal before reaching the Atlantic Ocean. The Tagus River supports diverse aquatic life and provides water for agriculture and urban use. The plant's secondary treatment reduces organic pollutants, helping to maintain water quality in this ecologically important watershed.