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 the virus and can we follow the spread of the virus.
Last values obtained on Wednesday, 18 May. Is updated on working days.
Source: RIVM
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This is the average of the last measurements of all wastewater treatment plants in this safety region. This figure also takes account of how many inhabitants are served by a wastewater treatment plant, and how much of the wastewater flowing to the plant comes from the safety region.
Every day the dashboard publishes the average number of virus particles per 100,000 inhabitants. To calculate this number, we use the last measurement of each wastewater treatment plant. The last measurement of a treatment plant can count several days in the calculation.
All wastewater treatment plants collect samples that are measured by the RIVM on average four times a week. If, for example, new measurement are passed on Monday, Wednesday and Saturday, the result of Wednesday's measurement also counts on Thursday and Friday. Only if the last measurement is older than nine days, it is not included in the average.
This graph shows the average number of virus particles over time per 100,000 inhabitants.
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