MONTALBAN Wastewater Treatment Plant, Cuencas Mineras, Aragón, Spain

MONTALBAN wastewater treatment plant serves the municipality of Montalbán in the Cuencas Mineras region of Aragón, Spain. It is a secondary treatment facility designed to handle a capacity of 4,000 cubic meters per day, with an average discharge volume of 510.94 cubic meters per day, serving a population of 2,819. The plant is located inland, away from coastal areas. As a secondary treatment plant, MONTALBAN provides biological treatment to remove organic matter and suspended solids. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), agglomerations with a population equivalent between 2,000 and 10,000 are required to have secondary treatment, which this plant meets. The plant's capacity utilization appears low, indicating it may be designed for future growth or seasonal variations. The treated effluent is discharged into local watercourses that eventually drain into the Ebro River basin, which flows into the Mediterranean Sea. The plant plays a key role in protecting the local watershed from pollution, supporting aquatic life and downstream water quality in the Ebro River system.

The plant discharges into local streams that are part of the Ebro River basin, one of Spain's largest river systems. The Ebro River flows eastward into the Mediterranean Sea, supporting diverse aquatic ecosystems and agricultural irrigation. The plant's secondary treatment helps reduce organic pollution and nutrient loads, protecting downstream water quality and the ecological health of the Ebro Delta, a regionally important wetland area.