Caiazzo Impianto Frazione S.S. Giovanni e Paolo Wastewater Treatment Plant, Caiazzo, Campania

Caiazzo Impianto Frazione S.S. Giovanni e Paolo is a municipal wastewater treatment plant located in the San Giovanni e Paolo district of Caiazzo, in the Campania region of southern Italy. The facility serves a small population of approximately 500 residents, reflecting its role in a rural or peri-urban setting. The plant is situated inland, more than 10 km from the coast, and operates under Italy's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC). The plant provides secondary treatment, which is the standard required by the EU directive for freshwater discharges from agglomerations of this size. With a designed capacity of 600 cubic meters per day and a current discharge volume of about 99 cubic meters per day, the facility operates well below its capacity, indicating room for future growth or seasonal variations. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The treated wastewater is discharged into local watercourses that drain into the Volturno River basin, one of the major river systems in southern Italy. The Volturno flows into the Tyrrhenian Sea near the Gulf of Gaeta. The plant's operations help protect the ecological health of the Volturno watershed, which supports diverse aquatic life and is used for agriculture and recreation downstream.

The plant discharges into local streams that feed the Volturno River, the longest river in southern Italy. The Volturno basin supports a variety of ecosystems, including riparian habitats and wetlands, and is important for migratory birds. Downstream, the river flows into the Tyrrhenian Sea, a semi-enclosed sea with sensitive coastal environments. The plant's secondary treatment helps reduce nutrient and organic pollution, mitigating eutrophication risks in the river and coastal zone.