Villadiego Wastewater Treatment Plant, Castilla y León, Spain

The Villadiego wastewater treatment plant is located in the municipality of Villadiego, in the province of Burgos, Castilla y León, Spain. It serves a population of approximately 2,000 residents, classifying it as a small agglomeration under Spanish and EU regulations. The plant provides 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 2,100 cubic meters per day indicates adequate infrastructure for the current population, with an average daily flow of 522.83 cubic meters. The treated effluent is discharged into local watercourses that ultimately drain into the Ebro River basin, one of Spain's major river systems. The Ebro River flows into the Mediterranean Sea, supporting diverse aquatic ecosystems and agricultural activities along its course. Proper treatment at Villadiego helps protect downstream water quality and ecological health.

The plant discharges into the Ebro River basin, which drains into the Mediterranean Sea. The Ebro Delta is an ecologically sensitive area that supports diverse aquatic life and migratory birds. Effective wastewater treatment at Villadiego reduces nutrient and pollutant loads, helping to maintain the ecological balance of the river and its downstream environments.