DP01517001_PERO_OLONA_SUD Wastewater Treatment Plant, Milano, Italy

DP01517001_PERO_OLONA_SUD is a major wastewater treatment facility located in the Milano metropolitan area, within the Lombardy region of northern Italy. The plant serves a population of approximately 447,363, classifying it as a large agglomeration under EU regulations. Its location in the Po Valley places it within a densely populated and industrially active region. As a large-scale plant, it is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires tertiary treatment for discharges into sensitive areas. The Po Valley contains several sensitive water bodies, including the Po River and its tributaries, which ultimately drain into the Adriatic Sea. The plant's treatment processes are expected to meet stringent nutrient removal standards to protect downstream ecosystems. The treated effluent from the plant is discharged into the local water network, which feeds into the Olona River, a tributary of the Po River. The Po River is Italy's longest river and flows into the Adriatic Sea, supporting diverse aquatic life and providing water for agriculture and industry. The plant plays a critical role in maintaining water quality in this densely populated and ecologically important basin.

The plant discharges into the Olona River, a tributary of the Po River, which flows eastward through the Po Valley and empties into the Adriatic Sea. The Po basin is a highly productive agricultural region and supports a variety of fish species, including sturgeon and eel. Nutrient loading from urban and agricultural runoff poses a risk of eutrophication in the Adriatic, making advanced treatment essential for protecting coastal waters.