Carral Abegondo Wastewater Treatment Plant, Carral, Galicia, Spain

Carral Abegondo is an advanced wastewater treatment plant located in Carral, in the province of A Coruña, Galicia, Spain. The plant serves a population of approximately 4,085 people and has a designed capacity of 4,000 m³/day, with a current discharge volume of 528 m³/day. As an advanced treatment facility, it provides a high level of pollutant removal, ensuring compliance with stringent environmental standards. The plant operates under Spain's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires appropriate treatment for agglomerations of this size. For small agglomerations like Carral, the directive mandates secondary treatment, but the plant's advanced treatment level exceeds these requirements, likely due to the sensitivity of the receiving environment. The treated effluent is discharged into local watercourses that flow toward the Atlantic coast, given the plant's proximity to the sea. The region's watershed supports diverse aquatic life and contributes to the ecological health of the Galician rias, which are important for fisheries and tourism. The plant's advanced treatment helps protect these downstream ecosystems from nutrient pollution and other contaminants.

The plant discharges into small streams that drain into the Atlantic Ocean via the Galician rias, a series of coastal inlets that support rich marine biodiversity. The region's watershed is ecologically sensitive, with habitats that sustain migratory fish species and shellfish populations. Advanced treatment at Carral Abegondo reduces nutrient loads, helping to prevent eutrophication in the coastal waters.