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Wastewater surveillance of infectious diseases
Illustrasjon: FHI
Illustrasjon: FHI

Results from wastewater surveillance

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This page gives and overview of the results from the wastewater-based surveillance of SARS-CoV-2 in Norway.

Here are the most recent results from the wastewater surveillance:

Results from previous weeks, see below (in Norwegian).

Graph over wastwater
Weekly concentration of SARS-CoV-2 RNA in Norwegian wastewater (red line), compared with clinical indicators. Status as of 09.11.2023. Note that the results from wastewater are based on selected sampling sites, while the clinical data represents national statistics. Clinical data from the last week are not complete. The definition for hospitalisation with covid-19 as the main cause was changed last week (see separate chapter on admissions in the weekly report on Respiratory infections including covid-19 and influenza for weeks 43 and 44). Source: Beredt C19 and the wastewater surveillance project.
Relative proportion of variants (Pangolin lineages) identified in wastewater in Norway
Relative proportion of variants (Pangolin lineages) identified in wastewater in Norway

The Norwegian SARS-CoV-2 wastewater surveillance system aims to strengthen and support trend analysis and early detection of new waves of SARS-CoV-2. 

Samples have been collected from wastewater treatment plants in the following areas: Tromsø, Trondheim, Bergen, Oslo and Ullensaker/Gardermoen airport, covering around 30% of the Norwegian population.

From 1 December 2022 the number of sampling sites have been reduced to include Trondheim, Bergen, Oslo and Ullensaker/Gardermoen airport, covering around 25% of the population.

From 1 April 2023 the number of sampling sites were further reduced to include Oslo and Ullensaker/Gardermoen airport, covering around 22% of the population. 

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