Impianto C. da Sparaci Parrini - Secondary Wastewater Treatment Plant in Casteltermini, Sicily

Impianto C. da Sparaci Parrini is a municipal wastewater treatment plant located in Casteltermini, a town in the province of Agrigento, Sicily, Italy. The plant serves a population of approximately 4,015 residents and is part of the region's water 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 4,600 m³/day and a current discharge volume of 360 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into the local watershed, which ultimately drains into the Mediterranean Sea via the Platani River basin. The plant plays a key role in protecting the water quality of the Platani River and the downstream coastal environment, supporting both ecological health and local water resources.

The plant discharges into the Platani River basin, which flows through the Sicilian interior and empties into the Mediterranean Sea along the southern coast of Sicily. The downstream environment includes agricultural areas and coastal ecosystems that depend on good water quality. The Platani River supports diverse aquatic life and is an important corridor for migratory species. Effective treatment helps prevent nutrient pollution and protects the marine environment from excessive nitrogen and phosphorus loads.