El Acebrón Wastewater Treatment Plant - Small Municipal Plant in Castilla-La Mancha, Spain

The El Acebrón wastewater treatment plant is located in the small municipality of El Acebrón, in the Castilla-La Mancha region of Spain. It serves a population of 156, making it a very small agglomeration under EU classification. The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for freshwater discharges from agglomerations of this size. The directive mandates secondary treatment for all agglomerations above 2,000 population equivalent, but smaller plants like this one may be subject to national regulations. The treated effluent is discharged into the local environment, likely into a small stream or groundwater. The plant's location inland, far from the coast, means its discharge affects local freshwater systems rather than marine environments. The surrounding area is rural, with agriculture being the primary land use.

The plant discharges into the local watershed, which is part of the Tagus River basin. The Tagus River flows westward through Spain and Portugal, eventually reaching the Atlantic Ocean near Lisbon. The immediate receiving water body is likely a small tributary or arroyo that feeds into the Tagus. The region's semi-arid climate means that water resources are limited, and maintaining water quality in these small streams is important for local agriculture and ecosystems.