19 Mar
Pilot monitoring of Slovenian waste waters for the SARS-CoV-2

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At the National Institute of Biology, financed by the Slovenian Research Agency, we are currently performing a pilot monitoring of Slovenian waste waters for the SARS-CoV-2 virus and mutations connected to its variants of concern. Here, we publish the results of our measurements, compare them with clinical data and provide with short interpretations.

SARS-CoV-2 in waste waters

(2. 4. 2021)

For most waste water treatment plants (WWTPs), the highest amounts of SARS-CoV-2 was measured towards the end of October/beginning of November 2020. Afterwards there was a drop in measured virus (with the exception of WWTP Koper, where amounts have continued to grow until today), but in early March the trend reversed into a slow increase across all WWTPs.



The dynamics of the virus in WW was approximated with the LOESS method.



Fraction of mutations connected to SARS-CoV-2 variants of concern in waste waters

(2. 4. 2021)

In the last months, in WWTP Ljubljana, the fraction of mutations connected to the B.1.1.7 variant ( also known as UK variant) is constantly increasing – in mid March the fraction was already close to 60%.





We thank all partners of the pilot monitoring:

  • Slovenian Research Agency,
  • Central WWTP Ljubljana,
  • Central WWTP Domžale-Kamnik,
  • Central WWTP Maribor,
  • Central WWTP Celje,
  • Central WWTP Koper,
  • Central WWTP Kranj,
  • Central WWTP Koper,
  • Central WWTP Šaleške doline,
  • National Laboratory of Health, Environment and Food,
  • Institute of microbiology and immunology of the Medical Faculty of University of Ljubljana,
  • The Division of Paediatrics,
  • UMCL.