Early indicators

Virus particles in wastewater Assen

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.

Last values obtained on Wednesday, 20 October. Is updated on a daily basis.

Source: RIVM

Average number of virus particles per 100,000 inhabitants

103 more than the previous value
x100 billion

Assen has 68,599 inhabitants.

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, 11 October - Sunday, 17 October · Source: RIVM

Number of measurements per week


2 of the 2 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, 11 October - Sunday, 17 October · Source: RIVM

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

This graph shows the average number of virus particles over time per 100,000 inhabitants.

x100 billion
Graph sewage installation over time. Use the keyboard to navigate through the time in the graph. With the left and right arrow keys you can move backwards and forwards in time. You can also use the left angle bracket < to go back and the right angle bracket > to go forward. With page-up and page-down you make bigger steps. Use the Home key and End key to go to the beginning and end of the timeline.
7 Sept 202029 Mar 202117 Oct 20210100200300400500
Weekly average:
  • 0 to 10
  • 10 to 50
  • 50 to 100
  • 100+

Source: RIVM