ORSOGNA_CAPOLUOGO Wastewater Treatment Plant, Orsogna, Italy

ORSOGNA_CAPOLUOGO is a wastewater treatment plant located in Orsogna, in the province of Chieti, Abruzzo region, Italy. The plant serves a population of approximately 2,700 residents, classifying it as a small agglomeration under Italian and EU regulations. The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for discharges into freshwater and estuaries from agglomerations of this size. With a designed capacity of 2,500 m³/day and a reported discharge volume of 534.50 m³/day, the plant operates well below its capacity, indicating potential for future growth or seasonal variability. The treated effluent is discharged into the local watershed, which ultimately drains into the Adriatic Sea. The plant's proximity to the coast (within 10 km) means its discharge can affect coastal water quality, making compliance with nutrient removal standards important for protecting marine ecosystems.

The plant discharges into the local drainage network that flows toward the Adriatic Sea, a semi-enclosed basin with limited water exchange. The coastal waters near Orsogna support diverse marine life and are important for tourism and fisheries. Nutrient loading from wastewater can contribute to eutrophication, so secondary treatment with potential nutrient removal is critical for maintaining water quality in this sensitive coastal environment.