Caianello Localita Santo Spirito Wastewater Treatment Plant, Santa Lucia, Campania

The Caianello Localita Santo Spirito wastewater treatment plant is located in Santa Lucia, a locality within the municipality of Caianello in the Campania region of southern Italy. The plant serves a small population of approximately 1,500 people, reflecting its role in a rural or peri-urban setting. As part of Italy's wastewater infrastructure, it contributes to local sanitation and environmental protection. 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. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The plant has a designed capacity of 1,500 cubic meters per day and currently discharges 296.95 cubic meters per day, indicating it operates well below its capacity. The treated effluent is discharged into local watercourses that eventually drain into the Tyrrhenian Sea via the Volturno River basin. The plant's operation helps protect the region's water quality, supporting aquatic life and downstream uses. Its location more than 10 km from the coast reduces direct marine impact, but it still plays a role in the broader watershed health.

The plant discharges into local streams that feed into the Volturno River, one of the major rivers in Campania, which flows into the Tyrrhenian Sea. The Volturno basin supports diverse aquatic ecosystems and is important for agriculture and tourism. The plant's secondary treatment helps reduce nutrient and organic pollution, mitigating eutrophication risks in the river and coastal waters.