DP01402202_CIVO_DAZIO Wastewater Treatment Plant, Dazio, Lombardy

DP01402202_CIVO_DAZIO is an advanced wastewater treatment plant located in Dazio, a municipality in the province of Sondrio, Lombardy, Italy. The plant serves a population of 3,512 and is situated in the alpine Valtellina valley, an area known for its mountainous terrain and proximity to the Adda River. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. With a designed capacity of 4,365 m³/day and a current discharge volume of 695.25 m³/day, the facility operates well within its capacity. As an Italian plant, it falls under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates appropriate treatment levels based on the sensitivity of receiving waters. The treated effluent is discharged into local watercourses that eventually flow into the Adda River, a major tributary of the Po River, which drains into the Adriatic Sea. The plant plays a crucial role in protecting the water quality of the Adda River and the downstream Po basin, supporting aquatic life and reducing nutrient loading in the Adriatic.

The plant discharges into the Adda River watershed, which flows through the Valtellina valley and joins the Po River near Cremona. The Po River then empties into the Adriatic Sea. The Adda River supports diverse aquatic ecosystems, including fish species such as brown trout and grayling. The advanced treatment helps minimize nutrient pollution, which is critical for preventing eutrophication in the Adriatic Sea.