DP09805401_SOMAGLIA Wastewater Treatment Plant, Somaglia, Lombardy

DP09805401_SOMAGLIA is an advanced wastewater treatment plant located in Somaglia, a municipality in the province of Lodi, Lombardy, Italy. The plant serves a population of approximately 3,951 residents and has a designed capacity of 4,000 cubic meters per day, with an average discharge volume of 782.16 m³/day. As an advanced treatment facility, it goes beyond secondary treatment to remove nutrients and other pollutants, meeting stringent standards under the EU Urban Waste Water Treatment Directive (91/271/EEC). For agglomerations of this size (under 10,000 PE), the directive requires appropriate treatment, and Italy's implementation ensures compliance with national regulations. The plant discharges treated effluent into local watercourses that ultimately drain into the Po River basin, one of Italy's most important watersheds. The Po River flows eastward into the Adriatic Sea, supporting diverse aquatic life and agricultural activities along its course. Advanced treatment helps protect these downstream ecosystems from nutrient pollution.

The plant's treated effluent enters the local drainage network within the Po River basin, Italy's largest river system. The Po flows approximately 652 km eastward through the Po Valley, a densely populated and agriculturally intensive region, before discharging into the Adriatic Sea. This watershed supports critical habitats for fish species such as sturgeon and eel, and its delta is an ecologically sensitive area. Advanced treatment at this plant helps reduce nutrient loads that could otherwise contribute to eutrophication in the Adriatic.