Mirabella Eclano Impianto Loc Madonna Delle Grazie - Secondary Wastewater Treatment Plant in Campania, Italy

Mirabella Eclano Impianto Loc Madonna Delle Grazie is a municipal wastewater treatment plant located in Mirabella Eclano, a town in the province of Avellino, Campania, Italy. The plant serves a population of approximately 4,300 people, classifying it as a small agglomeration under EU regulations. It is situated inland, more than 10 km from the coast, and its treated effluent is discharged into local watercourses. The plant provides secondary treatment, which is the minimum required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for freshwater discharges from agglomerations of this size. With a designed capacity of 4,500 m³/day and an average daily flow of 851.25 m³, the facility operates well below its capacity, indicating room for future growth or seasonal variations. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The treated wastewater is discharged into the local drainage network, which ultimately flows into the Calore Irpino River, a tributary of the Volturno River. The Volturno River drains into the Tyrrhenian Sea near Castel Volturno. This watershed supports diverse aquatic life and is important for regional agriculture and ecosystems. The plant's operation helps protect downstream water quality and supports the ecological health of the Calore and Volturno river systems.

The plant discharges into the Calore Irpino River, a tributary of the Volturno River, which flows into the Tyrrhenian Sea. The Volturno basin is the largest in southern Italy and supports diverse aquatic habitats, including fish species such as the Italian barbel and eel. Downstream areas are used for agriculture and recreation, making nutrient and pathogen removal critical for preventing eutrophication and safeguarding public health.