AZAGRA Wastewater Treatment Plant, Azagra, Navarra, Spain

The AZAGRA wastewater treatment plant is located in Azagra, a municipality in the province of Navarra, northern Spain. Situated near the Ebro River, the plant serves a population of approximately 8,907 people, classifying it as a medium agglomeration under EU regulations. As a Spanish facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations with a population equivalent between 2,000 and 15,000. The directive also mandates more stringent treatment if the receiving water body is designated as a sensitive area, such as those prone to eutrophication. The plant discharges treated wastewater into the Ebro River basin, which flows into the Mediterranean Sea via the Ebro Delta. The Ebro Delta is an ecologically significant area that supports diverse aquatic life and is an important migratory corridor for birds. Proper treatment at AZAGRA helps protect downstream water quality and the ecological health of the delta.

The AZAGRA plant discharges into the Ebro River basin, which flows through northeastern Spain before forming the Ebro Delta on the Mediterranean coast. The delta is an ecologically sensitive area that supports diverse aquatic life, including fish and bird species, and is an important migratory corridor. Effective wastewater treatment is essential to prevent nutrient pollution and protect the delta's ecological balance.