DP01406101_SONDRIO Wastewater Treatment Plant, Torchione, Lombardy

DP01406101_SONDRIO is a wastewater treatment plant located in Torchione, a locality near Sondrio in the Lombardy region of northern Italy. The plant serves an estimated population of 49,500, placing it in the medium-to-large agglomeration category under EU classification. It is situated in the Valtellina valley, an Alpine region known for its mountainous terrain and proximity to the Adda River. As a plant serving over 10,000 people, DP01406101_SONDRIO is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment as a minimum standard. For agglomerations above 15,000 population equivalent discharging into sensitive areas, tertiary treatment may be required. The plant's location in Lombardy, a region with numerous water bodies, suggests it likely operates under Italian national regulations that transpose the directive, with oversight from regional environmental authorities. The plant's treated effluent is expected to discharge into the Adda River, which flows through the Valtellina valley and eventually into Lake Como, a major subalpine lake. The Adda River system supports diverse aquatic life and is an important water resource for the region. Downstream, the Adda joins the Po River, which drains into the Adriatic Sea, making the plant's performance relevant to both local and downstream ecosystems.

The plant is located in the Adda River basin, within the Alpine region of Lombardy. The Adda River flows through the Valtellina valley and into Lake Como, a deep subalpine lake that supports diverse aquatic life and is a key recreational and ecological resource. From Lake Como, the Adda continues to the Po River, which ultimately discharges into the Adriatic Sea. The plant's discharge contributes to the water quality of this chain, with implications for downstream ecosystems including fish habitats and nutrient-sensitive areas.