Early indicators - Sewage water examination

Virus particles in wastewater

If you are infected with coronavirus, there are likely to be virus particles in your stool. These are flushed down the toilet and end up in wastewater. By testing samples of wastewater collected at wastewater treatment plants, we can get information about how widespread the virus is in the community. Please note: As of 4 March, more refined data analytics are being used. This leads to different values. To find out more about the information on this page, go to ‘Explanation of the data presented’.

Last values obtained on Sunday, April 11. Is updated on a daily basis.

Source: RIVM

Download data: RIVM

Average number of virus particles per 100,000 inhabitants

246.01
17.44 lessthan the previous value
x100 billion

The calculated average is based on all the wastewater measurements collected in one week. This figure also takes account of how many inhabitants are served by a wastewater treatment plant.

Value from Monday, March 29 - Sunday, April 4 · Source: RIVM

Number of measurements per week

519

294 of the 315 sampling locations reported at least one measurement in the given week.

Sampling locations can report multiple measurements per week. The number of measurements used per location per week can differ because not all measurements are successful.

Value from Monday, March 29 - Sunday, April 4 · Source: RIVM

Average number of virus particles over time (per 100,000 inhabitants)

This graph shows the progression over time in the average amount of virus particles in waste water, per 100,000 residents.
x100 billion
Sep 10, 2020Apr 1, 20210200400600800

Source: RIVM

Average number of virus particles per 100,000 inhabitants

This map shows the average number of virus particles per 100,000 inhabitants, per safety region.

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