Description

The Canadian Environmental Sustainability Indicators (CESI) program provides data and information to track Canada's performance on key environmental sustainability issues. The Boil water advisories indicators provide an overview of of the main reasons why boil water advisories are issued in Canada and also report on the relationship between community size and the percentage of boil water advisories issued each year. Drinking water advisories are public health protection messages issued by public health or regulatory authorities. The advisories inform those impacted about actions they should take to protect themselves from real or potential health risks related to their drinking water supply. Information is provided to Canadians in a number of formats including: static and interactive maps, charts and graphs, HTML and CSV data tables and downloadable reports. See the supplementary documentation for the data sources and details on how the data were collected and how the indicator was calculated. Canadian Environmental Sustainability Indicators: https://www.canada.ca/environmental-indicators

Resources

Name	Format	Description	Link
Causes of boil water advisories, Canada – French (1.83 kB)	CSV		https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/boil-water-advisories/2025/1-causes-avis-ebullition-eau.csv
Causes of boil water advisories, Canada – English (1.52 kB)	CSV		https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/boil-water-advisories/2025/1-causes-boil-water-advisories.csv
Boil water advisories by community size, Canada – French (1.55 kB)	CSV		https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/boil-water-advisories/2025/2-avis-ebullition-eau-taille-collectivites.csv
Boil water advisories by community size, Canada – English (1.29 kB)	CSV		https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/boil-water-advisories/2025/2-boil-water-advisories-community-size.csv
Percentage of boil water advisories grouped by the reason for issuance, Canada – English (2.68 kB)	CSV		https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/boil-water-advisories/2025/3-dsm-percentage-boil-water-advisories-reason.csv
Percentage of boil water advisories grouped by the reason for issuance, Canada – French (3.18 kB)	CSV		https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/boil-water-advisories/2025/3-dsm-pourcentage-avis-ebullition-eau-raisons.csv
Boil water advisories – English	HTML		https://www.canada.ca/en/environment-climate-change/services/environmental-indicators/boil-water-advisories.html
Data sources and methods – English	HTML		https://www.canada.ca/en/environment-climate-change/services/environmental-indicators/boil-water-advisories.html#DSM
Boil water advisories – French	HTML		https://www.canada.ca/fr/environnement-changement-climatique/services/indicateurs-environnementaux/avis-ebullition-eau.html
Data sources and methods – French	HTML		https://www.canada.ca/fr/environnement-changement-climatique/services/indicateurs-environnementaux/avis-ebullition-eau.html#DSM

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