USAGRE Wastewater Treatment Plant, Usagre, Extremadura, Spain

The USAGRE wastewater treatment plant is located in Usagre, a municipality in the province of Badajoz, Extremadura, Spain. The facility serves a population of approximately 5,900 people, classifying it as a small agglomeration under EU guidelines. As a Spanish plant, USAGRE operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires secondary treatment for agglomerations of this size. The directive also mandates appropriate treatment before discharge into inland waters, ensuring compliance with environmental standards. The plant's treated effluent is discharged into local watercourses that eventually drain into the Guadiana River basin, a major river system in southwestern Spain. The Guadiana flows into the Gulf of Cádiz (Atlantic Ocean), supporting diverse aquatic ecosystems along its course.

The plant discharges into the Guadiana River basin, which flows through Extremadura and into the Atlantic Ocean via the Gulf of Cádiz. This watershed supports important aquatic habitats and migratory fish species. The region's Mediterranean-continental climate with seasonal droughts makes consistent wastewater treatment critical for maintaining water quality in the river system.