IMPIANTO C DA S BARBARA Wastewater Treatment Plant, Caltanissetta, Sicily

IMPIANTO C DA S BARBARA is a wastewater treatment plant located in Caltanissetta, in the region of Sicily, Italy. The plant served the local community with secondary treatment, a standard level for inland facilities under Italian and EU regulations. It is now closed, and its designed capacity was 5000 cubic meters per day. As a secondary treatment plant, it provided biological treatment to remove organic matter and suspended solids, meeting the requirements of the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of its scale. The plant's closure may reflect upgrades or consolidation of regional wastewater infrastructure. The plant's discharge, when operational, would have entered local watercourses within the drainage basin of Sicily, ultimately reaching the Mediterranean Sea. The region's semi-arid climate and karst geology make water quality management important for protecting both groundwater and coastal ecosystems.

The plant is located inland in Sicily, over 10 km from the coast, within the drainage basin that flows to the Mediterranean Sea. The local watershed includes ephemeral streams that recharge aquifers and support agricultural areas. Protecting water quality in this region is important for maintaining the ecological health of coastal zones and marine habitats, including seagrass meadows and fish spawning grounds.