GRANATULA DE CALATRAVA Wastewater Treatment Plant, Granátula de Calatrava, Spain

GRANATULA DE CALATRAVA is a wastewater treatment plant located in the municipality of Granátula de Calatrava, in the province of Ciudad Real, Castilla-La Mancha, Spain. The plant serves a population of approximately 2,880 residents, reflecting its role as a small-scale municipal facility in a rural inland setting. The plant employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Advanced treatment typically includes nutrient removal (nitrogen and phosphorus) to protect sensitive receiving waters. The treated effluent is discharged into the local watershed, which ultimately drains into the Guadiana River basin. The Guadiana River flows westward through central Spain and Portugal before reaching the Atlantic Ocean. The plant's advanced treatment helps protect downstream aquatic ecosystems, including the ecologically sensitive wetlands and riverine habitats that depend on good water quality.

The plant discharges into the Guadiana River basin, one of the major Iberian river systems. The Guadiana River supports diverse aquatic life and is an important migratory corridor for fish species. Downstream, the river flows through the La Mancha plain and eventually reaches the Atlantic Ocean, with its estuary providing critical habitat for waterbirds and marine species. Advanced treatment at this plant helps reduce nutrient loading, which is crucial for preventing eutrophication in the river and its associated wetlands.