MONTANARO Wastewater Treatment Plant, Montanaro, Piemonte, Italy

The MONTANARO wastewater treatment plant is located in Montanaro, a town in the Piemonte region of northwestern Italy. It serves a population of approximately 3,000 residents, making it a small-scale municipal facility. The plant is situated inland, away from coastal areas, and discharges treated effluent into local watercourses that ultimately drain into the Po River basin. The plant provides secondary treatment, which is the standard biological treatment required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. The designed capacity is 3,500 m³/day, and the reported discharge volume is 966 m³/day, indicating operational headroom. As an Italian facility, it operates under national regulations that transpose EU directives, with oversight from regional environmental authorities. The treated effluent from the plant enters the local hydrologic network, contributing to the Po River watershed. The Po River is Italy's longest river and flows into the Adriatic Sea, supporting diverse aquatic ecosystems and agricultural water use downstream. The plant's secondary treatment helps reduce organic pollutants and protect water quality in the receiving environment.

The plant discharges into the Po River basin, which drains the Po Valley and ultimately reaches the Adriatic Sea. This watershed supports extensive agriculture and is ecologically important for fish species such as the European eel and various cyprinids. The secondary treatment provided helps mitigate nutrient loading and organic pollution, contributing to the health of downstream aquatic habitats.