DP01407201_VALDISOTTO Wastewater Treatment Plant, Santa Maria Maddalena, Valdisotto, Lombardy

DP01407201_VALDISOTTO is a wastewater treatment plant located in Santa Maria Maddalena, a frazione of Valdisotto in the province of Sondrio, Lombardy, Italy. The plant serves a population equivalent of 25,140, placing it in the medium agglomeration category under EU classification. As an Italian facility, the plant operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires secondary treatment for agglomerations of this size discharging into freshwater. The directive also mandates more stringent treatment if the receiving waters are designated as sensitive areas, which is common in Alpine regions. The plant's treated effluent is discharged into local watercourses that drain into the Adda River, a major tributary of the Po River. The Po River basin is ecologically significant, supporting diverse aquatic life and providing water for agriculture and industry in northern Italy. The plant plays a key role in protecting the water quality of this important river system.

The plant discharges into the Adda River basin, which flows through Valtellina and eventually joins the Po River near Cremona. The Po River is Italy's longest river and its delta is an ecologically sensitive area that supports diverse aquatic life and migratory bird species. The plant's treatment helps maintain water quality in this important watershed.