MONTORNES DEL VALLES Wastewater Treatment Plant, Montornès del Vallès, Catalunya

MONTORNES DEL VALLES is a wastewater treatment plant located in Montornès del Vallès, in the Vallès Oriental comarca of Barcelona, Catalunya, Spain. It serves a population equivalent of 138,006, classifying it as a large agglomeration under EU regulations. The plant is situated along the Besòs River, a key waterway in the region. As a large agglomeration in a sensitive area, the plant is expected to provide tertiary treatment under the EU Urban Waste Water Treatment Directive (91/271/EEC). The designed capacity is 1. The plant's infrastructure is part of the broader Catalan water management system, which emphasizes compliance with EU standards for nutrient removal and environmental protection. The treated effluent is discharged into the Besòs River, which flows through the metropolitan area of Barcelona before reaching the Mediterranean Sea. The river supports diverse aquatic life and is an important ecological corridor in a densely populated region. The plant plays a crucial role in protecting the coastal waters of the Mediterranean from nutrient pollution and safeguarding recreational and marine habitats.

The plant discharges into the Besòs River, which flows through the Vallès Oriental region and the Barcelona metropolitan area before emptying into the Mediterranean Sea. The river supports a variety of fish and bird species and serves as a green corridor in an urbanized landscape. Downstream, the coastal waters of the Mediterranean are ecologically sensitive, hosting seagrass meadows and marine biodiversity that require protection from nutrient loading and contaminants.