CASATEJADA Wastewater Treatment Plant, Casatejada, Extremadura, Spain

CASATEJADA is a wastewater treatment plant located in Casatejada, a municipality in the province of Cáceres, Extremadura, Spain. The plant serves a population of approximately 8,500 people, placing it in the small-to-medium agglomeration category under EU classification. As a Spanish facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The directive also mandates appropriate treatment before discharge into inland waters, with more stringent requirements for sensitive areas. The treated effluent is discharged into local watercourses that ultimately drain 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 near Lisbon. The plant's operations help protect the ecological health of this important river system and its downstream environments.

The plant discharges into the Tagus River basin, which flows through central Spain and Portugal to the Atlantic Ocean. The Tagus supports diverse aquatic life and provides water for agriculture and urban use. Downstream, the river passes through the Tagus Estuary, an ecologically sensitive area that serves as a critical habitat for migratory birds and fish species. Protecting water quality in this basin is essential for maintaining regional biodiversity and ecosystem services.