ALAGON Wastewater Treatment Plant, Alagón, Aragón, Spain

ALAGON is a wastewater treatment plant located in Alagón, a municipality in the province of Zaragoza, within the autonomous community of Aragón, Spain. The plant serves a population of approximately 9,329 people, placing it in the small to medium agglomeration category under EU classification. Its location in the Ebro River basin positions it within a region of agricultural and industrial activity. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), agglomerations of this size are required to provide secondary treatment or equivalent. Spain has transposed this directive into national law, and plants like ALAGON are subject to regulatory oversight by the relevant water authority. The plant is expected to meet the standards set for its population tier. The treated effluent from ALAGON is discharged into the local water system, which ultimately drains into the Ebro River. The Ebro is one of Spain's major rivers, flowing into the Mediterranean Sea via the Ebro Delta, an ecologically sensitive area that supports diverse aquatic life and important migratory bird populations. Proper treatment at plants like ALAGON helps protect downstream water quality and the delta's ecosystem.

ALAGON's treated wastewater discharges into the Ebro River basin, which flows through northeastern Spain before reaching the Mediterranean Sea at the Ebro Delta. The delta is a critical habitat for numerous bird species and supports extensive rice farming and fisheries. The plant's operations contribute to maintaining water quality in the Ebro, which is essential for both ecological health and human uses such as irrigation and recreation.