PEDROSO EL Wastewater Treatment Plant, El Pedroso, Andalucía, Spain

PEDROSO EL is a wastewater treatment plant located in El Pedroso, a municipality in the province of Seville, within the autonomous community of Andalucía, Spain. The plant serves a population of around 4,489 residents, classifying it as a small agglomeration under Spanish and EU regulations. The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for freshwater discharges from agglomerations of this size. The designed capacity is 4,571 m³/day, and the reported discharge volume is 813.62 m³/day, indicating operational headroom. The treated effluent is discharged into the local watershed, which ultimately drains into the Guadalquivir River basin. The Guadalquivir flows southwest through Andalucía and empties into the Gulf of Cádiz (Atlantic Ocean). The plant plays a key role in protecting the region's water resources and supporting the ecological health of downstream aquatic environments.

The plant discharges into the Guadalquivir River basin, which flows through the fertile plains of Andalucía and supports diverse aquatic life, including migratory fish species. The river eventually reaches the Doñana wetlands and the Gulf of Cádiz, an ecologically sensitive coastal area. Secondary treatment helps reduce organic pollution and nutrient loads, safeguarding water quality in this important watershed.