COVID-19 wastewater monitoring dashboard: Viral signal trend

This dashboard provides data about the levels of COVID-19 and variants found in the wastewater (sewage) of different communities across Canada. This information can help assess 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 at some sites may lag slightly, due to the time it takes to transport and analyze samples. This report was last updated on November 10, 2023 with data up to and including November 2, 2023.

On this page

Key updates

These tiles show how many of the wastewater monitoring sites are showing increases, decreases or no change in their recent COVID-19 viral signals. They also show whether there is a high, moderate, or low signal level.

Number of sites showing an increase


Number of sites showing no change


Number of sites showing a decrease

Current COVID-19 signal level compared to historical data collected since December 1, 2021



New sites

About these data tiles
  • An increase is a statistically significant increase in the wastewater signal.
  • No change is either a steady signal or an insignificant decrease in the wastewater signal.
  • A decrease is a statistically significant decrease in the wastewater signal.

National overview

Figure 1. Current wastewater signal trends and levels in Canada

Zoom or tap regions to see current signal trends and levels in Canada. Map data is available in .csv format.

Data from {} sites are included on this dashboard.

Figure 1: Text description
  • This information is based on sewage samples submitted for testing to the National Microbiology Laboratory or a participating partner laboratory.
  • The National Microbiology Laboratory conducts testing for over 70 sites across Canada, with partner laboratories conducting testing for other sites. Data from 62 sites are included on this dashboard. Site selection and the decision to publish results on the dashboard is always at the discretion of provinces, territories and municipalities.
  • For the signal level metric, sites are marked as 'new' if they started testing after December 1, 2021. The data for these sites doesn’t cover the entire post-Omicron period, which is the data we normally use to establish cutoff values. Consequently, new sites may underestimate the viral peak of the pandemic.

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 sampling event with the previous 6 sampling events. Use the ‘show daily values’ button to display the daily viral load as a dotted green line. This shows the current trend of the COVID-19 signals and the current signal level compared to previous levels for each site. 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-19 in your community. It's important to pay attention to public health alerts and to follow public health advice. Personal protective measures are effective actions you can take every day to 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 the other controls below to sort alphabetically or by trend, filter by region show daily viral load, or to show thresholds for current signal level.

Figure 2. Trend graph of 7-day rolling average of COVID-19 viral load in wastewater, as of March 28, 2022

Selected regions:

Figure 2: 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
Alberta Alberta Health Respiratory Virus Dashboard
British Columbia Metro Vancouver COVID-19 Wastewater Dashboard
British Columbia Provincial Health Services Authority Wastewater Monitoring
Newfoundland and Labrador Newfoundland and Labrador Wastewater Monitoring Report
Northwest Territories Wastewater Monitoring in the Northwest Territories
Ontario Public Health Ontario Wastewater Monitoring Dashboard
Ontario Algoma Public Health Unit Dashboard
Ontario Brant County Health Unit Dashboard
Ontario City of Greater Sudbury Dashboard
Ontario Durham Region COVID-19 Wastewater Monitoring
Ontario Eastern Ontario Health Unit Dashboard
Ontario Haldimand-Norfolk 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 Middlesex-London Health Unit Dashboard
Ontario Northwestern Health Unit Dashboard
Ontario Ottawa Public Health Dashboard
Ontario Peterborough Public Health Dashboard
Ontario Region of Peel – Public Health Weekly Report
Ontario Region of Waterloo Dashboard
Ontario Simcoe Muskoka District Health Unit Dashboard
Ontario Southwestern Public Health Dashboard
Ontario Thunder Bay District Health Unit Dashboard
Ontario Timiskaming Health Unit Report
Ontario Toronto Public Health Wastewater Report
Ontario Wellington-Dufferin-Guelph Dashboard
Ontario Windsor-Essex County Dashboard
Ontario York Region Dashboard
Quebec Institut national de santé publique du Québec

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