ARGAMASILLA DE CALATRAVA Wastewater Treatment Plant, Argamasilla de Calatrava, Spain

ARGAMASILLA DE CALATRAVA is a wastewater treatment plant located in Argamasilla de Calatrava, in the province of Ciudad Real, Castilla-La Mancha, Spain. It serves a population of 7,500, classifying it as a small to medium agglomeration under Spanish and EU regulations. The plant provides secondary treatment, which is the minimum standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for inland freshwater discharges from agglomerations of this size. The plant discharges an average of 891.45 cubic meters of treated wastewater per day. The treated effluent is discharged into a local watercourse within the Guadiana River basin, which flows through the La Mancha region and ultimately reaches the Atlantic Ocean via the Gulf of Cadiz. The Guadiana basin supports diverse aquatic life and is an important ecological corridor in the Iberian Peninsula.

The plant discharges into a tributary of the Guadiana River, which flows through the semi-arid La Mancha region before reaching the Atlantic Ocean. The Guadiana basin is ecologically sensitive, supporting species such as the Iberian lynx and numerous waterfowl. Secondary treatment helps reduce organic pollution and nutrient loads, protecting downstream aquatic habitats.