DP01304701_CARLAZZO Wastewater Treatment Plant, San Pietro Sovera, Lombardy

DP01304701_CARLAZZO is an advanced wastewater treatment plant located in the hamlet of San Pietro Sovera, within the municipality of Carlazzo, in the province of Como, Lombardy, Italy. The plant serves a population of about 4,563 people, reflecting a small to medium agglomeration in the pre-Alpine region of northern Italy. The plant provides advanced (tertiary) treatment, which goes beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Its design capacity of 10,000 m³/day indicates infrastructure capable of handling peak flows, with a reported discharge volume of 903.31 m³/day. As an Italian facility, it operates under national regulations implementing the EU directive, with oversight from regional environmental agencies. The treated effluent is discharged into local watercourses that drain into Lake Como, a major subalpine lake, and ultimately into the Po River and the Adriatic Sea. The plant plays a key role in protecting the sensitive aquatic ecosystems of the Lake Como basin, which supports diverse aquatic life and is an important recreational and ecological resource.

The plant discharges into streams that flow into Lake Como, a deep subalpine lake in Lombardy. Lake Como drains via the Adda River into the Po River, which reaches the Adriatic Sea. The lake's ecosystem is sensitive to nutrient inputs, and advanced treatment helps control eutrophication, supporting diverse aquatic life and water quality for downstream communities.