DP09801401_CASTIGLIONE_D_ADDA Wastewater Treatment Plant, Castiglione d'Adda, Lombardy

DP09801401_CASTIGLIONE_D_ADDA is an advanced wastewater treatment plant located in Castiglione d'Adda, a town in the Lombardy region of northern Italy. The plant serves a population of approximately 5,040 and has a designed capacity of 5,000 cubic meters per day, with a discharge volume of 997.74 cubic meters per day. It is situated inland, more than 50 kilometers from the coast, and treats wastewater from the local community. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), agglomerations with a population equivalent (PE) between 2,000 and 10,000 are required to have appropriate treatment, and Italy has designated sensitive areas that may require more stringent treatment. The plant's advanced treatment level suggests it meets or exceeds these requirements, likely discharging into a sensitive water body. The treated effluent is discharged into the local water system, which ultimately drains into the Po River basin. The Po River is the longest river in Italy and flows into the Adriatic Sea. The plant plays a crucial role in protecting the water quality of the Po River and its tributaries, supporting aquatic life and downstream ecosystems.

The plant discharges into the Po River basin, which flows eastward through northern Italy and empties into the Adriatic Sea. The Po River supports diverse aquatic life and is an important agricultural and industrial water source. Advanced treatment helps reduce nutrient loading, which is critical for preventing eutrophication in the Adriatic Sea and maintaining the ecological balance of the river system.