A
new report on COVID in wastewater.
Time course quantitative detection of SARS-CoV-2 in Parisian wastewaters correlates with COVID-19 confirmed cases | medRxiv
From Paris France. The researchers tested untreated and treated wastewater from 3 major treatment plants from early March to early April. They wanted to see if testing wastewater could help define the presence of the disease in the community
23 of 23 untreated samples were positive by quantitative PCR testing. This testing gives a measure of how much viral material is present, not just yes/no. This is raw sewage.
6 of 8 treated samples were positive. The treated samples showed a 100 times reduction in viral load.
The article does not indicate the methodology of treatment used in Paris.