Castelvetro di Modena Wastewater Treatment Plant, Cà di Sola, Emilia-Romagna

The Castelvetro di Modena wastewater treatment plant is located in Cà di Sola, a locality within the municipality of Castelvetro di Modena, in the Emilia-Romagna region of northern Italy. The plant serves a population of approximately 4,131 people, classifying it as a small agglomeration under EU regulations. As a plant serving fewer than 10,000 population equivalents, it operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires appropriate treatment (secondary or equivalent) for discharges into freshwater or estuaries. The regulatory framework ensures compliance with national and EU standards for small-scale wastewater treatment. The treated effluent is discharged into local watercourses that eventually drain into the Po River basin, one of Italy's most significant watersheds. The Po River flows eastward into the Adriatic Sea, supporting diverse aquatic ecosystems and agricultural activities along its course. The plant plays a key role in protecting local water quality in the Emilia-Romagna region.

The plant discharges into tributaries of the Po River, which flows through northern Italy and empties into the Adriatic Sea. The Po basin is a densely populated and agriculturally intensive region, making effective wastewater treatment critical for preventing eutrophication and safeguarding aquatic habitats. The downstream environment supports diverse fish species and migratory birds, and the Adriatic Sea receives nutrient-sensitive waters that require careful management.