DP01507801_CISLIANO Wastewater Treatment Plant, Bestazzo, Lombardy, Italy

DP01507801_CISLIANO is an advanced wastewater treatment facility located in Bestazzo, a locality within the municipality of Cisliano in the Lombardy region of northern Italy. The plant serves a population of approximately 4,439 people, placing it in the small agglomeration category under Italian and EU regulations. Its location in the Po Valley, a densely populated and agriculturally intensive area, underscores the importance of effective wastewater management for protecting regional water resources. The plant employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Advanced treatment typically includes nutrient removal (nitrogen and phosphorus) to address eutrophication risks in sensitive receiving waters. The plant has a designed capacity of 2,500 m³/day and currently discharges approximately 878.76 m³/day of treated wastewater, indicating operational headroom. The treated effluent from DP01507801_CISLIANO is discharged into local watercourses that ultimately drain into the Po River basin, the largest river system in Italy. The Po River flows eastward into the Adriatic Sea, supporting extensive agricultural irrigation, diverse aquatic habitats, and important wetland ecosystems. The plant's advanced treatment helps reduce nutrient loading to the Po basin, contributing to the ecological health of the river and its delta.

The plant discharges into the Po River basin, which drains the entire Po Valley and flows into the Adriatic Sea. This watershed supports intensive agriculture and is ecologically sensitive due to nutrient enrichment risks. The Po Delta is a critical habitat for migratory birds and aquatic species, making advanced nutrient removal essential for maintaining water quality and biodiversity.