DP01404801_PIANTEDO Wastewater Treatment Plant, Piantedo, Lombardy, Italy

DP01404801_PIANTEDO is an advanced wastewater treatment plant located in Piantedo, a municipality in the Valtellina valley of Lombardy, northern Italy. The plant serves a population of around 2,000 residents and has a designed capacity of 2,500 cubic meters per day, with a current discharge volume of about 396 m³/day. 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), Italy requires advanced treatment for agglomerations discharging into sensitive areas, such as the Alpine lakes and rivers. Although Piantedo's population is below the 10,000 PE threshold for mandatory secondary treatment, the plant's advanced level reflects local environmental priorities. The treated effluent is discharged into the Adda River, which flows through Valtellina into Lake Como, a major subalpine lake. Lake Como is a sensitive ecosystem supporting diverse aquatic life and is a key water resource for the region. The plant's advanced treatment helps protect water quality in the Adda-Lake Como system, which ultimately drains into the Po River and the Adriatic Sea.

The plant discharges into the Adda River, a major tributary of Lake Como in the Po River basin. Lake Como is a deep subalpine lake with high ecological sensitivity, supporting endemic fish species and serving as a critical water source for downstream communities. The Adda River flows through the Valtellina valley, an area known for agriculture and tourism, where nutrient pollution from wastewater can impact lake water quality. Advanced treatment at this plant helps reduce nitrogen and phosphorus loads, mitigating eutrophication risks in Lake Como and the downstream Po River delta, which empties into the Adriatic Sea.