Ceclavín Wastewater Treatment Plant, Ceclavín, Extremadura, Spain

The Ceclavín wastewater treatment plant is located in the municipality of Ceclavín, in the province of Cáceres, Extremadura, Spain. It serves a population of approximately 5,000 people, classifying it as a small agglomeration under EU regulations. The plant is situated inland, away from coastal areas, and its operations are part of the regional wastewater infrastructure managed by local authorities. The plant provides secondary treatment, which is the minimum required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for freshwater discharges from agglomerations of this size. With a designed capacity of 3,000 m³/day and an actual discharge volume of 906.24 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variability. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The treated effluent is discharged into the local water system, which ultimately drains into the Tagus River basin, one of the major river systems in the Iberian Peninsula. The Tagus River flows westward through Spain and Portugal, emptying into the Atlantic Ocean near Lisbon. The plant's operations help protect downstream water quality and support the ecological health of the Tagus River and its tributaries.

The Ceclavín plant discharges into the Tagus River basin, which flows through central Spain and Portugal to the Atlantic Ocean. The Tagus River supports diverse aquatic life and is an important water resource for agriculture and urban areas. The plant's secondary treatment reduces organic pollutants, helping to maintain water quality in the river and its downstream ecosystems, including the Tagus Estuary, a vital habitat for migratory birds and fish species.