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COVID-19 wastewater surveillance dashboard

Wastewater 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 28, 2022 with data up to and including March 28, 2022.

Changes to the data

We have temporarily removed Saint John from the dashboard, due to possible issues affecting data accuracy. Once these issues have been investigated and resolved, Saint John will once again be included in the dashboard.

On this page

Key updates

Number of sites showing an increase

Number of sites showing a possible increase

Number of sites showing a decrease

Number of sites showing no change

About these data tiles

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 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

Selected regions:

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)

These dashboards and websites are led by provincial, territorial and academic partners across Canada.

For corrections or additions, please contact:

Region Link
Alberta Centre for Health Informatics Dashboard
British Columbia British Columbia Centre for Disease Control Wastewater Surveillance
Newfoundland and Labrador Newfoundland and Labrador Wastewater Surveillance Report
Northwest Territories Wastewater Monitoring in the Northwest Territories
Ontario Ontario Science Table Dashboard
Ontario Brant County Health Unit Dashboard
Ontario City of Greater Sudbury Dashboard
Ontario Durham Region COVID-19 Wastewater Surveillance
Ontario Eastern Ontario Health Unit Dashboard
Ontario Halton Region Dashboard
Ontario Hamilton Public Health Services Dashboard
Ontario Haliburton, Kawartha, Pine Ridge District Health Unit Dashboard
Ontario Kingston, Frontenac and Lennox & Addington Public Health Dashboard
Ontario Leeds, Grenville and Lanark District Health Unit Dashboard
Ontario Ottawa Public Health Dashboard
Ontario Region of Peel – Public Health Weekly Report
Ontario Region of Waterloo Dashboard
Ontario Simcoe Muskoka District Health Unit Dashboard
Ontario Thunder Bay District Health Unit Dashboard
Ontario Toronto Public Health Wastewater Report
Ontario Wellington-Dufferin-Guelph Dashboard
Ontario Windsor-Essex County Dashboard
Ontario York Region Dashboard
Quebec The Centreau-COVID Pilot Project Dashboard
Saskatchewan University of Saskatchewan Dashboard

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