BORTIGALI_LOC_TIRIANI Wastewater Treatment Plant, Bortigali, Sardinia

BORTIGALI_LOC_TIRIANI is a municipal wastewater treatment plant located near Bortigali in the Nuoro province of Sardinia, Italy. The facility serves a population of approximately 4,438 people, classifying it as a small agglomeration under Italian and EU regulations. The plant is situated inland, more than 10 km from the coast, and discharges treated effluent into the local watershed. The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size discharging into freshwater bodies. The designed capacity is 2,500 m³/day, with a reported discharge volume of 878.57 m³/day, indicating operational headroom. As an Italian facility, it operates under the national implementation of the directive, overseen by regional environmental authorities in Sardinia. The treated effluent enters the local drainage network, which ultimately flows into the Tyrrhenian Sea via the Tirso River or smaller coastal streams. The surrounding region is characterized by Mediterranean climate and hilly terrain, with agriculture and tourism as key economic activities. The plant plays a vital role in protecting local water quality and the downstream marine environment.

The plant discharges into the inland watershed of Sardinia, which drains into the Tyrrhenian Sea via rivers such as the Tirso. The region supports diverse aquatic life and is important for migratory birds. The Mediterranean coastal zone is ecologically sensitive, and secondary treatment helps reduce nutrient loads that could otherwise contribute to eutrophication in coastal waters.