Castello d'Argile Nuovo Mascarino Wastewater Treatment Plant, Mascarino Venezzano, Emilia-Romagna

The Castello d'Argile Nuovo Mascarino wastewater treatment plant is located in Mascarino Venezzano, a locality within the municipality of Castello d'Argile in the Emilia-Romagna region of northern Italy. The plant serves a population of approximately 6,600 people, placing it in the small-to-medium agglomeration category under Italian and European regulatory frameworks. As a plant serving fewer than 10,000 population equivalents, it falls under the EU Urban Waste Water Treatment Directive (91/271/EEC) requirements for appropriate treatment. Italian regulations transpose this directive, mandating secondary treatment for inland freshwater discharges from agglomerations of this size. It operates within the regulatory framework that ensures compliance with national and EU standards. The plant discharges treated effluent into local watercourses that ultimately drain into the Po River basin, one of Italy's most significant hydrological systems. The Po River flows eastward across the Po Valley and empties into the Adriatic Sea near Venice. The receiving waters support diverse aquatic life and are important for agriculture and ecosystems in the region.

The plant's treated effluent enters local streams that are part of the Reno River basin, which flows through the Emilia-Romagna plain and discharges into the Adriatic Sea. The Po Valley watershed is ecologically sensitive, supporting extensive agricultural activity and diverse freshwater habitats. Downstream waters are influenced by nutrient inputs from urban and agricultural sources, making proper treatment essential for maintaining water quality and preventing eutrophication in the Adriatic coastal zone.