TRAIGUERA LA JANA Wastewater Treatment Plant, Traiguera, Spain

The TRAIGUERA LA JANA wastewater treatment plant is located in Traiguera, a municipality in the Baix Maestrat region of Castellón, Comunitat Valenciana, Spain. The plant serves a population of approximately 3,338 people and operates under Spain's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC). As a small agglomeration, it is required to provide secondary treatment, which the plant delivers. The plant has a designed capacity of 5,311 m³/day and currently treats an average daily volume of 327.77 m³, indicating significant spare capacity. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids, meeting EU standards for discharge into sensitive areas. The treated effluent is discharged into the local environment near the Mediterranean coast. The plant's proximity to the coast (within 10 km) means its discharge can affect coastal water quality. The region's rivers, such as the Cenia and the Sénia, drain into the Mediterranean, supporting diverse marine life and coastal ecosystems. Proper treatment helps protect bathing waters and marine habitats along the Costa del Azahar.

The plant discharges into the Mediterranean Sea via local watercourses in the Baix Maestrat region. The receiving environment includes coastal waters that support seagrass meadows and fish nurseries. The area is part of the broader Gulf of Valencia basin, where nutrient inputs from wastewater can affect water quality and marine biodiversity. Secondary treatment reduces organic load and suspended solids, helping to maintain ecological balance in this sensitive coastal zone.