SARENTINO Wastewater Treatment Plant, Stilfs - Stelvio, Trentino-Alto Adige

The SARENTINO wastewater treatment plant is located in the municipality of Stilfs - Stelvio, within the province of Bolzano in the Trentino-Alto Adige region of northern Italy. Situated in the alpine Vinschgau valley, the plant serves a population of around 8,185 residents, typical of a small mountain community. The facility is part of Italy's municipal wastewater infrastructure, which is regulated under national laws transposing the EU Urban Waste Water Treatment Directive (91/271/EEC). As a plant serving fewer than 10,000 people, it falls under the EU category of 'small agglomeration,' which requires appropriate treatment to protect sensitive alpine water bodies. Italian regulations mandate secondary treatment for such communities, with potential additional nutrient removal if the receiving waters are designated as sensitive areas. The plant's capacity and operational status are managed by local authorities to ensure compliance with environmental standards. The treated effluent from the SARENTINO plant is discharged into local watercourses that drain into the Adige River, one of Italy's major rivers flowing south to the Adriatic Sea. The alpine watershed is ecologically sensitive, supporting diverse aquatic life and serving as a critical water resource for the region. Proper wastewater treatment is essential to maintain water quality in this pristine mountain environment.

The SARENTINO plant discharges into tributaries of the Adige River, which flows through the Trentino-Alto Adige region and ultimately reaches the Adriatic Sea near Venice. The alpine watershed is characterized by cold, oxygen-rich waters that support sensitive species such as brown trout and the endangered marble trout. Protecting this ecosystem from nutrient pollution and pathogens is vital for maintaining biodiversity and the region's natural heritage.