CozAR Wastewater Treatment Plant, Cózar, Castilla-La Mancha, Spain

CozAR is an advanced wastewater treatment plant located in Cózar, a municipality in the province of Ciudad Real, within the autonomous community of Castilla-La Mancha, Spain. The plant serves a population of 1,630, reflecting its role in managing domestic wastewater for this small inland community. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), agglomerations with a population equivalent (PE) between 2,000 and 10,000 are typically required to have secondary treatment. However, as an advanced treatment facility, CozAR likely meets stricter discharge standards, possibly due to the sensitivity of the receiving environment. The treated effluent is discharged into local watercourses that eventually drain into the Guadiana River basin, which flows westward into the Atlantic Ocean. The region's semi-arid climate and agricultural activity make water quality management crucial for sustaining local ecosystems and downstream water resources.

CozAR discharges into the Guadiana River basin, one of Spain's major river systems, which flows through the La Mancha plain and ultimately reaches the Atlantic Ocean via the Gulf of Cádiz. The Guadiana basin supports diverse aquatic habitats and is important for irrigation and wildlife, including migratory birds. Advanced treatment helps protect these ecosystems from nutrient pollution and other contaminants.