CAUDIEL Wastewater Treatment Plant, Caudiel, Comunitat Valenciana, Spain

The CAUDIEL wastewater treatment plant is located in Caudiel, within the Comunitat Valenciana region of Spain. It serves a population of 1,308 and operates under Spain's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The plant has a designed capacity of 4,891.00 m³/day and currently treats a daily volume of 580.69 m³. As a secondary treatment facility, CAUDIEL employs biological processes to reduce organic matter and suspended solids, meeting the EU directive's standards for inland freshwater discharge. The plant's capacity utilization is low relative to its design, indicating room for future growth or seasonal variability in flow. The treated effluent is discharged into a local watercourse that drains into the Mediterranean Sea via the Palancia River basin. The plant plays a key role in protecting downstream water quality and supporting the ecological health of the region's rivers and coastal waters.

The CAUDIEL plant discharges into the Palancia River basin, which flows eastward to the Mediterranean Sea near Sagunto. The river supports diverse aquatic life and is an important corridor for migratory birds. The plant's secondary treatment helps reduce nutrient loading and organic pollution, safeguarding the ecological balance of the river and its coastal outlet.