This report 111 presents the results of SARS-CoV-2 contamination of wastewater at the entrance of the 13 wastewater treatment plants (WWTPs) analysed during the week 01 of 2022. All WWTPs, excepted Hesperange and Boevange were analysed twice this week. However, only the results collected at the end of the week were presented in this report. The results obtained during the first sampling campaign are considered unrepresentative due to the very heavy rainfall in the country. The results obtained show abnormally low SARS-CoV-2 fluxes, most probably due to a dilution effect and sewage overflows.
The SARS-CoV-2 RNA flux measured in WWTPs at the end of this week continue to show a very high national prevalence of the virus, with a SARS-CoV-2 flux between 2 and 3 x 1012 RNA copies per day per 100,000 equivalent-inhabitants. The current SARS-CoV-2 level in WWTPs is very similar to that observed in December 2021. The general trend over several weeks or even months is clearly upwards.
As a reminder, no sampling was carried out during the last week of 2021 (week 52).