COVID-19 wastewater surveillance dashboard
This dashboard provides trend data about the levels of COVID-19 in the wastewater (sewage) of different communities and settings across Canada. This can reflect the levels of COVID-19 in those communities. We update this information on Tuesdays and Fridays at 12:00 noon Eastern Time. In the event of a holiday, we update on the next business day. Data may lag slightly, due to the time it takes to transport and analyze the samples. This report was last updated on December 6, 2022 with data up to and including March 28, 2022.
On this page
- Interpreting wastewater data
- Canadian wastewater COVID-19 surveillance dashboards and websites
- Download the data
About these data tiles
- An increase is a statistically significant increase in the wastewater signal.
- A possible increase is an increase in the wastewater signal that is not statistically significant.
- A decrease is a statistically significant decrease in the wastewater signal.
- No change is either a steady signal or an insignificant decrease in the wastewater signal.
Interpreting wastewater data
The wastewater dashboard shows the concentration of COVID-19 in wastewater samples from different sites.
The solid green line shows the 7-day rolling average of the viral load for each site. We calculate the 7-day rolling average by averaging the viral loads from each day with the previous 6 days. A dotted green line that shows the daily viral load can be added by using the ‘show daily values’ button. Use caution when interpreting daily and short-term changes in viral load, as the wastewater signal can change from day to day. An ongoing increase or decrease in the viral load is more reliable for indicating trends.
If the wastewater signals are high or increasing, this may indicate a high level of COVID in your community. It’s important to pay attention to public health alerts and to follow public health advice. Consider the risks and make informed decisions about individual public health measures. Even if they’re no longer required in your community or setting, individual public health measures can help reduce the spread of COVID-19.
The data throughout the page changes to reflect the date range you select below. Select a date range from the drop-down menu, use the slider to define your date range, or type the dates directly into the From and To boxes. Use additional controls below to sort alphabetically, filter by region, adjust the page layout, or to show daily viral load.
Figure 1. Trend graph of 7-day rolling average of COVID-19 viral load in wastewater, as of March 28, 2022
Figure 1: Text description
7-day rolling average of COVID-19 viral load in wastewater, as of March 28, 2022
|Date||Site||7-day rolling average of COVID-19 viral load (copies/mL)|
Canadian wastewater COVID-19 surveillance dashboards and websites
These dashboards and websites are led by provincial, territorial and academic partners across Canada.
For corrections or additions, please contact: email@example.com.
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