Chiusano di San Domenico Wastewater Treatment Plant, Campania, Italy

The Chiusano di San Domenico wastewater treatment plant, located in the Avellino province of Campania, Italy, provides secondary treatment for a population of approximately 2,000 residents. The facility has a designed capacity of 3,000 cubic meters per day and discharges an average volume of 395.93 cubic meters daily. As part of Italy's municipal infrastructure, the plant supports the sanitation needs of this inland community. Operating under Italy's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), the plant meets the required secondary treatment standards for agglomerations of this size. The directive mandates secondary treatment for all discharges from agglomerations above 2,000 population equivalent, ensuring compliance with European environmental norms. The plant's treatment process effectively reduces organic matter and suspended solids before discharge. The treated effluent is released into local streams that drain into the Calore Irpino river, a tributary of the Volturno river system, which ultimately flows into the Tyrrhenian Sea. This inland location, more than 10 km from the coast, reduces direct marine impact. The plant plays a vital role in protecting the local watershed and downstream aquatic ecosystems from untreated wastewater pollution.

The plant discharges into small watercourses that feed into the Calore Irpino river, part of the Volturno basin. The Volturno river flows through Campania and into the Tyrrhenian Sea near Castel Volturno. This watershed supports diverse aquatic life and is important for regional agriculture and biodiversity. The secondary treatment provided helps maintain water quality in this ecologically sensitive river system.