Overview
Depuratore di Mezzana serves Marilleva in Trentino-Alto Adige, Italy, treating wastewater for about 22,300 people. The plant discharges into the local water system in the Val di Sole region.
Depuratore di Mezzana is a municipal wastewater treatment plant located in Marilleva, a frazione of Mezzana in the Trentino-Alto Adige region of northern Italy. Situated in the Val di Sole valley, the plant serves a population of approximately 22,300 people, primarily from the surrounding mountain communities and tourist facilities. The plant operates under Italy's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. As a plant serving a medium-sized agglomeration (over 15,000 population equivalent), it is subject to EU standards for urban wastewater treatment. The directive mandates secondary treatment as a minimum, with more stringent requirements if the receiving waters are designated as sensitive areas. The plant's location in a mountainous, alpine environment may influence its design and operational considerations, particularly regarding seasonal tourist population fluctuations. The treated effluent is discharged into local watercourses that feed into the Noce River, a tributary of the Adige River. The Adige flows south through Trentino and Veneto before entering the Adriatic Sea near Chioggia. The plant plays a key role in protecting the water quality of the Noce and Adige rivers, which support diverse aquatic life and are important for irrigation and recreation in the region.
Environmental context
The plant discharges into the Noce River watershed, which flows into the Adige River, Italy's second-longest river. The Adige ultimately reaches the Adriatic Sea, supporting ecologically sensitive coastal lagoons and wetlands. The alpine streams in this region are critical for maintaining cold-water habitats for species such as brown trout and the endangered marble trout. The plant's treatment performance is vital to prevent nutrient enrichment and protect downstream aquatic ecosystems.
Frequently asked questions
Depuratore di Mezzana is located in Marilleva, a frazione of Mezzana in the Trentino-Alto Adige region of northern Italy, within the Val di Sole valley.
The plant serves approximately 22,300 people, including residents and seasonal tourists in the Marilleva and Mezzana areas.
The treated effluent is discharged into local streams that flow into the Noce River, a tributary of the Adige River, which eventually reaches the Adriatic Sea.
The plant operates under Italy's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations over 15,000 population equivalent.
Under the EU UWWTD, plants serving over 15,000 population equivalent must provide at least secondary treatment. In sensitive areas, more stringent tertiary treatment may be required to reduce nutrients.
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