CHINCHON Wastewater Treatment Plant, Chinchón, Comunidad de Madrid, Spain

The CHINCHON wastewater treatment plant is located in Chinchón, within the Comunidad de Madrid, Spain. It serves a population of approximately 5,546 residents, classifying it as a small agglomeration under EU classification. The plant is situated inland, away from coastal areas, and its operations are part of the region's water management infrastructure. The plant employs advanced treatment processes, which go beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 15,260 m³/day and a reported discharge volume of 974.83 m³/day, the facility has substantial capacity to handle current and future loads. The advanced treatment level ensures high-quality effluent suitable for discharge into sensitive environments. The treated wastewater is discharged into local watercourses that ultimately drain into the Tagus River basin, a major river system in Spain. The Tagus River flows westward through central Spain and into Portugal, eventually reaching the Atlantic Ocean near Lisbon. The plant's advanced treatment helps protect the ecological health of the Tagus River and its tributaries, supporting aquatic life and downstream water quality.

The plant discharges into the Tagus River basin, which flows through central Spain and Portugal to the Atlantic Ocean. The Tagus River supports diverse aquatic ecosystems and is an important water resource for agriculture and urban areas. Advanced treatment at this plant helps reduce nutrient loads and pollutants, protecting the river's ecological balance and downstream habitats.