This report 30 presents the results of SARS-CoV-2 contamination of wastewater at the entrance to 13 wastewater
treatment plants (WWTPs) obtained during week 49. Two separate sampling dates were analysed, with the
exception of the Hespérange and Boevange-sur-Attert treatment plants.
During week 49, the level of contamination remains for all the treatment plants analysed at high SARS CoV-2
flux values, indicating a high prevalence of the virus in the wastewater, still higher than in the first wave
(Figures 1a and 1b). However, the data collected this week, particularly at the end of the week, confirmed
the downward trend observed in previous weeks. This trend will have to be validated in the days or weeks to
At the level of treatment plants, SARS-CoV-2 RNA flows still show jagged variations on a weekly basis. However,
a downward trend, as in previous weeks, can also be observed for all treatment plants studied individually.
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Previous reports and more information can be found on the website of LIST.
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