Valdorros Wastewater Treatment Plant: Serving Valdorros, Castilla y León, Spain

Valdorros wastewater treatment plant is located in the municipality of Valdorros, in the province of Burgos, within the autonomous community of Castilla y León, Spain. The plant serves a population of approximately 2,118 residents, classifying it as a small agglomeration under Spanish and EU regulations. The plant operates with secondary treatment, which is the minimum standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for freshwater discharges from agglomerations of this size. The designed capacity of 2,118 population equivalents aligns with the population served, indicating adequate infrastructure for the community's needs. The treated effluent is discharged into local watercourses that eventually drain into the Duero River basin, one of the major river systems in the Iberian Peninsula. The Duero flows westward through Spain and Portugal before reaching the Atlantic Ocean. The plant's operations help protect the local aquatic environment and downstream water quality.

The plant discharges into the Duero River basin, which flows through the Castilla y León region and ultimately reaches the Atlantic Ocean near Porto, Portugal. The basin supports diverse aquatic life and is an important agricultural and ecological corridor. Secondary treatment reduces organic pollutants and suspended solids, helping to maintain water quality in the river system.