ROTZO_LOC_CASTELLETTO Wastewater Treatment Plant, Rotzo, Veneto, Italy

ROTZO_LOC_CASTELLETTO is a municipal wastewater treatment plant located in the small town of Rotzo, in the Veneto region of northern Italy. Serving a population of 40, it is a small-scale facility that handles local domestic wastewater from the Castelletto area. 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. The plant operates well below its capacity, indicating ample headroom for future growth or seasonal variations. The treated effluent is discharged into local watercourses that ultimately drain into the Po River basin and the Adriatic Sea. The plant plays a key role in protecting the local watershed and downstream ecosystems from untreated sewage, supporting water quality in the Veneto region.

The plant discharges into small streams in the Vicenza province, which flow into the Bacchiglione River and eventually the Po River delta and the Adriatic Sea. The Po River basin is a densely populated and agriculturally intensive area, making nutrient removal from wastewater critical to prevent eutrophication in the Adriatic. The plant's secondary treatment helps reduce organic load and protect downstream aquatic life.