PONTECESURES Wastewater Treatment Plant, Infesta, Galicia, Spain

PONTECESURES is an advanced wastewater treatment plant located in the parish of Infesta, within the municipality of Pontecesures in Galicia, Spain. The facility serves a population of approximately 3,370 people and has a designed capacity of 3,500 m³/day, currently treating 798.75 m³/day of wastewater. As an advanced treatment plant, PONTECESURES goes beyond secondary treatment to remove nutrients and other pollutants, meeting the stringent requirements of the EU Urban Waste Water Treatment Directive (91/271/EEC) for sensitive areas. The plant's scale places it in the small agglomeration category, for which secondary treatment is typically required, but the advanced level indicates additional nutrient removal to protect receiving waters. The plant's proximity to the coast (within 10 km) means its treated effluent likely discharges into the Ulla River estuary or directly into the Ría de Arousa, a productive marine ecosystem in the Atlantic Ocean. This area supports diverse aquatic life, including shellfish fisheries, and the advanced treatment helps minimize nutrient loading and protect coastal water quality.

The plant discharges into the Ulla River, which flows into the Ría de Arousa, a large coastal inlet in Galicia. The ría is an ecologically sensitive area supporting shellfish aquaculture and diverse marine habitats. Advanced treatment at PONTECESURES reduces nutrient inputs, helping to prevent eutrophication and maintain water quality in this productive Atlantic ecosystem.