SAMPER DE CALANDAHIJARURREA DE GAEN Wastewater Treatment Plant, Samper de Calanda, Aragón

SAMPER DE CALANDAHIJARURREA DE GAEN is a wastewater treatment plant located in Samper de Calanda, within the Bajo Martín comarca of Aragón, Spain. The facility serves a population of about 3,915 and is designed to handle up to 9,000 m³/day, with a current discharge volume of 709.58 m³/day. As a secondary treatment plant, it provides biological treatment to reduce organic matter and suspended solids. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), secondary treatment is the standard requirement for inland freshwater discharges from agglomerations of this size, ensuring compliance with European environmental standards. The plant's treated effluent is discharged into local watercourses that drain into the Ebro River basin, one of Spain's most significant hydrological systems. The Ebro River flows eastward into the Mediterranean Sea, supporting diverse aquatic ecosystems and agricultural irrigation along its course. The plant plays a key role in protecting these downstream environments from pollution.

The plant discharges into the Ebro River basin, which ultimately drains into the Mediterranean Sea via the Ebro Delta. This delta is an ecologically sensitive area that supports diverse aquatic life, including migratory fish and waterbirds. The secondary treatment provided helps reduce nutrient loads and organic pollution, safeguarding water quality in the river and its downstream ecosystems.