This report 45 presents the results of SARS-CoV-2 contamination of wastewater at the entrance of 13 wastewater
treatment plants (WWTPs) during the fourth week of 2021.
As the previous week, the SARS-CoV-2 RNA fluxes occurring in sewage treatment plants during the week 04
were still important, but with a decreasing trend, indicating a medium prevalence of the virus in sewage at national
and regional level. The downward trend corresponds to an average reduction of about 1.3 log compared to the
maximum peak of the current wave.
At the level of the treatment plant, similar dynamic patterns were observed, with a decreasing trend for all the
plants analysed. For some of them, the RT-qPCR signal is close to the limit of quantification of our tests, or is
sometimes even below the limit of quantification.
This report has been established by:
in collaboration with
Previous reports and more information can be found on the website of LIST.
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