Impianto C. da Castellaccio Wastewater Treatment Plant, Castrofilippo, Sicily

Impianto C. da Castellaccio is a municipal wastewater treatment plant located in Castrofilippo, a town in the province of Agrigento, Sicily, Italy. The plant serves a population of approximately 3,452 residents and is part of the region's wastewater infrastructure managed under Italian and EU regulations. The plant provides secondary treatment, which is the standard biological treatment required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 4,500 m³/day and a current discharge volume of 683.37 m³/day, the plant operates well below its capacity, indicating potential for future growth or seasonal variations. The treated effluent is discharged into the local watershed, which ultimately drains into the Mediterranean Sea. The plant plays a key role in protecting the surrounding environment, including agricultural areas and the coastal waters of southern Sicily, by reducing organic load and pollutants before discharge.

The plant discharges into the local drainage system that flows into the Mediterranean Sea near the southern coast of Sicily. This coastal region supports diverse marine life and is important for local fisheries and tourism. Proper wastewater treatment is essential to prevent eutrophication and protect the ecological health of the coastal waters.