HUESCA Wastewater Treatment Plant, Huesca, Aragón, Spain

The HUESCA wastewater treatment plant is located in Huesca/Uesca, in the autonomous community of Aragón, Spain. It serves a population of approximately 88,696, classifying it as a medium-to-large agglomeration under EU regulations. The plant is situated inland, away from coastal areas, and its treated effluent is discharged into local water bodies that ultimately drain into the Ebro River basin. 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 (PE) between 10,000 and 150,000. For larger agglomerations or discharges into sensitive areas, tertiary treatment may be required. Compliance with the directive ensures a minimum level of treatment to protect receiving waters. The plant's discharge contributes to the local watershed, which is part of the Ebro River basin, one of the most important river systems in Spain. The Ebro River flows into the Mediterranean Sea, supporting diverse aquatic life and agricultural activities downstream. Proper treatment at this facility helps maintain water quality in the region, reducing nutrient loads and protecting ecological health.

The HUESCA plant discharges into local streams that are part of the Ebro River basin. The Ebro River flows eastward through northeastern Spain and empties into the Mediterranean Sea via the Ebro Delta, a ecologically sensitive area that supports diverse bird species and aquatic life. The plant's treatment helps mitigate nutrient pollution and protects downstream water quality in this important watershed.