What is the method used for SARS-CoV-2 detection in sewage and other environments?

The method used for virus detection is called RT-PCR. This is the same method as is used to detect SARS-CoV-2 in patients. In this method, the RNA fragments (genes from the virus) are detected confirming the presence of SARS-CoV-2. This does not give additional information on its infectivity or presence of the protein coat (capsid). Medema et al. (2020) present more details about the method applied at the KWR laboratory.