IMPIANTO C DA VANELLE C DA SAN ROCCO - Secondary Wastewater Treatment in Villarosa, Sicily

IMPIANTO C DA VANELLE C DA SAN ROCCO is a municipal wastewater treatment plant located in Villarosa, a town in the province of Enna, Sicily, Italy. The plant serves a population of approximately 4,500 people, reflecting a small to medium agglomeration in the inland region of Sicily. Its designed capacity of 6,500 m³/day provides some headroom for future growth or seasonal variations. The plant provides secondary treatment, which is the standard required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size discharging into freshwater or estuaries. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids, ensuring compliance with EU effluent quality standards. The plant operates within Italy's national regulatory framework, which implements the directive through regional authorities. The treated effluent is discharged into the local watershed, which ultimately drains into the Mediterranean Sea via the Salso River or other tributaries of the Ionian Sea. The plant plays a key role in protecting the water quality of local streams and the downstream marine environment, supporting both ecological health and human uses such as agriculture and recreation.

The plant discharges into the inland watershed of Sicily, which flows through the Salso River and other tributaries toward the Ionian Sea. The region's Mediterranean climate features dry summers and wet winters, influencing runoff and dilution capacity. The downstream environment supports diverse aquatic life and is important for local agriculture. Protecting water quality in this watershed helps maintain ecological balance and supports the health of coastal marine habitats.