VILLALON DE CAMPOS Wastewater Treatment Plant, Villalón de Campos, Castilla y León

VILLALON DE CAMPOS is a wastewater treatment plant located in Villalón de Campos, a town in the province of Valladolid, within the autonomous community of Castilla y León, Spain. The plant serves a population of approximately 3,117 residents, treating domestic wastewater from the local community. The plant operates with secondary treatment, which is the standard biological treatment required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The plant has a designed capacity of 3,117 population equivalents, matching the population served, and handles a discharge volume of 335.70 cubic meters per day. The treated effluent is discharged into local watercourses that ultimately drain into the Duero River basin. The Duero River flows westward through Spain and Portugal, emptying into the Atlantic Ocean at Porto. The plant plays a key role in protecting the local aquatic environment and downstream water quality in the Duero catchment.

The plant discharges into the Duero River basin, which is the largest river basin in the Iberian Peninsula. The Duero River flows through Castilla y León and into Portugal, supporting diverse aquatic life and agricultural irrigation. Downstream, the river forms the Douro Valley, a region known for its vineyards and ecological significance. The plant's secondary treatment helps reduce nutrient and organic pollution, safeguarding water quality in this important transboundary watershed.