CULLAR Wastewater Treatment Plant, Cúllar, Granada, Andalucía, Spain

The CULLAR wastewater treatment plant is located in Cúllar, a municipality in the Comarca de Baza, Granada, within the autonomous community of Andalucía, Spain. The plant serves a population of approximately 3,500 people, classifying it as a small agglomeration under Spanish and EU regulations. The plant operates with 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 5,000 m³/day, and the current discharge volume is 634.37 m³/day, indicating operational capacity well within design limits. The treated effluent is discharged into a local watercourse that ultimately drains into the Mediterranean Sea via the Guadiana Menor River and the Guadalquivir River basin. The plant plays a key role in protecting local water quality and supporting the ecological health of the downstream aquatic environment.

The plant discharges into a tributary of the Guadiana Menor River, which flows into the Guadalquivir River and eventually reaches the Mediterranean Sea. The local watershed supports agricultural activities and diverse aquatic life. The secondary treatment provided helps reduce nutrient and organic pollutant loads, protecting downstream water quality and the sensitive coastal ecosystems of the Mediterranean.