Siliqua Wastewater Treatment Plant - Sardinia, Italy

The Siliqua wastewater treatment plant is located in Siliqua, a town in the province of Cagliari on the island of Sardinia, Italy. The facility serves a population of approximately 4,150 and operates with advanced treatment processes, ensuring high-quality effluent before discharge. With a designed capacity of 5,000 cubic meters per day and an actual discharge volume of 821.55 cubic meters per day, the plant operates well below its capacity. As an Italian facility, it falls under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates advanced treatment for sensitive areas and secondary treatment for all agglomerations above 2,000 population equivalent. The treated effluent is discharged into local watercourses that eventually drain into the Mediterranean Sea. Sardinia's Mediterranean climate and coastal ecosystems rely on effective wastewater management to protect water quality and marine biodiversity.

The plant discharges into local streams that flow toward the southern coast of Sardinia, ultimately reaching the Mediterranean Sea. The region supports diverse aquatic life and important coastal habitats. Proper treatment is essential to prevent nutrient enrichment and protect the sensitive marine environment of the Mediterranean basin.