Villarrasa Wastewater Treatment Plant, Andalusia, Spain

Villarrasa wastewater treatment plant is located in the municipality of Villarrasa, in the El Condado region of Huelva, Andalusia, Spain. The facility serves a population of approximately 2,192 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 provides secondary treatment, which typically involves biological processes to reduce organic matter and suspended solids. With a designed capacity of 2,192 population equivalents and a daily discharge volume of 397.29 cubic meters, the plant is sized appropriately for its service area. As a small agglomeration, it meets the EU directive's requirements for secondary treatment. The treated effluent is discharged into local watercourses that drain into the Atlantic Ocean via the Guadalquivir River basin. The surrounding area is part of the Doñana region, an ecologically sensitive area that supports diverse aquatic life and migratory birds. The plant's operation helps protect downstream water quality in this important ecological corridor.

The plant discharges into local streams that flow into the Guadalquivir River basin, ultimately reaching the Atlantic Ocean near the Gulf of Cádiz. This region includes ecologically sensitive wetlands and estuaries that support diverse aquatic life and serve as a critical migratory corridor for birds. The secondary treatment provided helps reduce nutrient and organic pollution, protecting downstream habitats.