Sacedón Wastewater Treatment Plant - Sacedón, Castilla-La Mancha, Spain

The Sacedón wastewater treatment plant is located in the town of Sacedón, in the province of Guadalajara, within the autonomous community of Castilla-La Mancha, Spain. It serves a population of 1,784, classifying it as a small agglomeration under Spanish and EU regulations. The plant is situated inland, away from coastal areas. The facility provides secondary treatment, which is the minimum standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for freshwater discharges from agglomerations of this size. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The treated effluent is discharged into the local environment, likely into a tributary of the Tagus River basin, which ultimately flows into the Atlantic Ocean near Lisbon. The region is characterized by a continental Mediterranean climate, with the plant playing a key role in protecting local water quality and supporting downstream ecosystems.

The plant discharges into the Tagus River basin, one of the Iberian Peninsula's major river systems. The Tagus flows westward through Spain and Portugal, emptying into the Atlantic Ocean at the Tagus Estuary near Lisbon. This estuary is an ecologically sensitive area supporting diverse aquatic life and migratory bird species. The plant's secondary treatment helps reduce nutrient and organic pollution, mitigating eutrophication risks in downstream waters.