MOIA Wastewater Treatment Plant, Moià, Catalunya, Spain

MOIA is a wastewater treatment plant located in the industrial area of Moià, in the Moianès comarca of Barcelona, Catalunya, Spain. The plant serves a population of about 5,026 people, classifying it as a small agglomeration under EU regulations. It is situated inland, away from coastal areas, and its treated effluent likely discharges into local watercourses that feed into the Mediterranean basin. As a Spanish facility, MOIA operates under the national transposition of the EU Urban Waste Water Treatment Directive (91/271/EEC). For agglomerations of this size (under 10,000 population equivalent), the directive requires appropriate treatment, typically secondary treatment, to protect receiving waters. The plant's designed capacity is 1.00 (likely in thousands of cubic meters per day or similar units), indicating a modest scale suited to the local population. The plant's discharge ultimately reaches the Mediterranean Sea via the regional river network. The Moianès region is characterized by a Mediterranean climate with seasonal rainfall, and the local watershed supports diverse aquatic life. Proper treatment at MOIA helps maintain water quality in downstream ecosystems, including streams that flow toward the Llobregat or Ter river basins, which are important for regional water supply and biodiversity.

MOIA's treated wastewater is discharged into local streams within the Moianès region, which are part of the broader Mediterranean watershed. These watercourses eventually drain into the Mediterranean Sea, supporting aquatic habitats along the way. The area's Mediterranean climate means seasonal variations in flow, and the plant's treatment helps protect downstream ecosystems from nutrient pollution and organic load, particularly during low-flow periods when dilution is limited.