Monistrol de Montserrat Wastewater Treatment Plant, Catalonia, Spain

The Monistrol de Montserrat wastewater treatment plant is located in the Bages comarca of Barcelona province, Catalonia, Spain. Serving a population of 6,639, the plant is part of the municipal wastewater infrastructure for the town of Monistrol de Montserrat, situated near the Montserrat mountain range. As a Spanish wastewater facility, the plant operates under the national transposition of the EU Urban Waste Water Treatment Directive (91/271/EEC). For agglomerations with a population equivalent between 2,000 and 10,000, the directive requires appropriate treatment, typically secondary treatment, to protect receiving water bodies. The plant's designed capacity of 1.00 volume units indicates its scale relative to the population served. The plant's treated effluent is discharged into the local hydrological network, which ultimately drains into the Llobregat River basin. The Llobregat River flows southeast through Catalonia and discharges into the Mediterranean Sea near Barcelona. The receiving waters support diverse aquatic life and are important for regional water supply and irrigation.

The plant discharges into the Llobregat River basin, which flows into the Mediterranean Sea. The Llobregat is a key water resource for Catalonia, supporting agriculture, industry, and drinking water supplies. The downstream environment includes ecologically sensitive areas that rely on good water quality to sustain aquatic biodiversity and prevent eutrophication in coastal zones.