IMPIANTO C DA FONTANAZZA Wastewater Treatment Plant, Alimena, Sicily

IMPIANTO C DA FONTANAZZA is a municipal wastewater treatment facility located in Alimena, a town in the province of Palermo, Sicily, Italy. The plant serves a population of approximately 2,269, classifying it as a small agglomeration under Italian and EU regulations. It operates under Italy's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for inland freshwater discharges from agglomerations of this size. The plant provides secondary treatment, a biological process that significantly reduces organic matter and suspended solids. With a designed capacity of 5,174 cubic meters per day and an average discharge volume of 449 cubic meters per day, the facility operates well below its capacity, indicating room for future growth or seasonal variability. The treatment process aligns with EU standards for protecting receiving water bodies from pollution. The treated effluent is discharged into local inland waters, which eventually drain into the Mediterranean Sea via the Imera Meridionale or other regional rivers. The plant plays a key role in safeguarding the local watershed, supporting aquatic ecosystems, and preventing eutrophication in downstream coastal areas. Its inland location reduces direct marine impact but still contributes to the overall health of the Mediterranean basin.

The plant discharges into inland watercourses in the Imera Meridionale basin, which flows into the Mediterranean Sea near the southern coast of Sicily. The receiving waters support diverse aquatic life and are part of a regionally important hydrological network. The plant's secondary treatment helps protect downstream ecosystems from nutrient overload and organic pollution, maintaining water quality for both ecological and human uses.