MENDAVIA Wastewater Treatment Plant, Mendavia, Navarra, Spain

The MENDAVIA wastewater treatment plant is located in Mendavia, a municipality in the province of Navarra, northern Spain. The facility serves a population equivalent of 20,142, classifying it as a medium-sized agglomeration under Spanish and EU regulations. The plant is situated inland, away from coastal areas, and its operations are integral to local water management. The plant provides secondary treatment, which is the minimum standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. The designed capacity is 22,500 m³ per day, with an actual discharge volume of 622 m³ per day, indicating significant spare capacity. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The treated effluent is discharged into a local watercourse, which ultimately drains into the Ebro River basin, one of Spain's major river systems. The Ebro River flows into the Mediterranean Sea, supporting diverse aquatic ecosystems and agricultural activities along its course. The plant's operation helps protect downstream water quality and ecological health.

The plant discharges into a tributary of the Ebro River, which flows through the Ebro Basin to the Mediterranean Sea. This region supports diverse aquatic life and is important for irrigation and drinking water supply. The Ebro Delta, a ecologically sensitive area, relies on upstream water quality management to maintain its wetland habitats and migratory bird populations.