DP09701301_CALOLZIOCORTE Wastewater Treatment Plant, Calolziocorte, Lombardy

DP09701301_CALOLZIOCORTE is a municipal wastewater treatment plant located in Calolziocorte, a town in the province of Lecco, Lombardy, Italy. The plant serves a population equivalent of approximately 28,571, placing it in the medium agglomeration category under Italian and EU regulations. It is situated along the Adda River valley, an area characterized by Alpine foothills and dense urbanization. As a plant serving a population between 10,000 and 100,000, it falls under the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires secondary treatment as a minimum standard. Italian plants of this scale typically employ biological treatment with activated sludge or similar technologies to meet national discharge standards. The plant's treated effluent is discharged into the Adda River, which flows south through Lombardy and eventually into the Po River, the longest river in Italy. The Po Delta empties into the Adriatic Sea, making this plant part of a larger watershed that supports extensive agriculture, industry, and biodiversity. Proper treatment is essential to protect downstream ecosystems and water quality.

The plant discharges into the Adda River, a major tributary of the Po River, which flows into the Adriatic Sea. The Adda River basin supports diverse aquatic life and is an important corridor for migratory fish. The Po Delta is an ecologically sensitive area with extensive wetlands and lagoons that rely on upstream water quality management.