Drinking Water Quality and Consumption: Annual Reports

Last updated August 10, 2022
Reading time: 2 min

Consult various reports on the testing, quality and consumption of drinking water.

Annual reports

Drinking water quality

Each year, the city reports on the results of water quality testing in its distribution systems. In addition, it produces a complete operational report on the analyses carried out. All these reports become available at the end of March.

In 2021, 16,201 bacteriological samples and nearly 8,800 physical-chemical samples were taken at the drinking water production plants and across the distribution networks. These samples were then analyzed by the technical lab of Montréal’s Service de l’environnement.  

The operational reports summarize all drinking water tests performed during the year.

2021 highlights

  • After two network events, a few samples, representing less than 0.2% of samples taken, were declared non-compliant with bacteriological standards. Two boil-water advisories were then issued: in August in the Dollard-Des Ormeaux and Pierrefonds-Roxboro sectors, and in July for the Botanical Garden network. 
  • The results of the physical-chemical analyses carried out show that lead and turbidity (cloudiness) are the only two parameters that exceeded the standard or maximum acceptable concentration.
  • The city has implemented an action plan to eliminate lead from water inlet piping across its territory. Individuals who agreed to participate in the regulatory testing were sent a letter indicating the result of the lead measurement. Occupants and owners of buildings with lead concentrations higher than 0.002 mg/L were informed of measures to be taken to reduce lead exposure, such as the use of a filtration device. 
  • At the Symposium on water management organized by Réseau Environnement, five of the city’s plants were recognized for exceeding the treatment quality standards defined in the Regulation respecting the quality of drinking water.

Drinking water usage

The City produces an annual water usage summary to report on the requirements of Québec’s strategy for drinking water conservation (the Stratégie québécoise d’économie d’eau potable or SQEEP). This provincial strategy aims to ensure sustainable management of municipal resources and assets. Such an approach is necessary to ensure the sustainability of water services to the population and for future generations.

Drinking water quality annual testing reports

Drinking water quality reports

Drinking water usage report

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