Firstly, the surveillance of wastewaters can highlight the onset of new epidemic waves in the catchment area served by the sampled wastewater treatment plant in a significant advance. SARS-CoV-2 RNA can in fact be detected in human faeces up to one week before the beginning of the disease-related symptoms (Furukawa et al.,2020, Tindale et al., 2020), thus anticipating the results of diagnostic tests and hospitalizations due to COVID-19. Moreover, wastewater samples can provide data on the average SARS-CoV-2 infection rate of thousands of people served by the sewer network. Aggregated data can be particularly useful for areas where it is not possible to establish massive screening campaigns with diagnostic tests. Furthermore, continuous monitoring of wastewater, coupled with a wide spread of sampling points throughout the territory, can easily identify new outbreaks.