Emissions of harmful substances to air

Description

The Canadian Environmental Sustainability Indicators (CESI) program provides data and information to track Canada's performance on key environmental sustainability issues. These indicators track human-related emissions to air of 3 substances (mercury, lead and cadmium) and facility-based emissions to air of 1 substance (arsenic). The 4 substances are defined as toxic under the Canadian Environmental Protection Act, 1999. For each substance, data are provided at the national, regional (provincial and territorial) and facility level, and by source. Global emissions data are also provided for mercury. The indicators inform Canadians about emissions of mercury, lead and cadmium to air from human activity and emissions of arsenic from facility-based reporting in Canada. These indicators also help the government to identify priorities and develop or revise strategies to inform further risk management and to track progress on policies put in place to reduce or control these 4 substances and air pollution in general. 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
Cadmium emissions to air by province and territory, Canada, 1994, 2013 and 2023 – English (CSV; 1.72 kB) CSV https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/emissions-of-harmful-substances-to-air/2025/10-cadmium-province-air-en.csv
Cadmium emissions to air by province and territory, Canada, 1994, 2013 and 2023 – French (CSV; 2.06 kB) CSV https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/emissions-of-harmful-substances-to-air/2025/10-cadmium-province-air-fr.csv
Facility-based arsenic emissions to air by source, Canada, 1993 to 2023 – English (CSV; 2.07 kB) CSV https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/emissions-of-harmful-substances-to-air/2025/12-arsenic-source-air-en.csv
Facility-based arsenic emissions to air by source, Canada, 1993 to 2023 – French (CSV; 2.27 kB) CSV https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/emissions-of-harmful-substances-to-air/2025/12-arsenic-source-air-fr.csv
Facility-based arsenic emissions to air by province and territory, Canada, 2003, 2013 and 2023 – English (CSV; 1.63 kB) CSV https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/emissions-of-harmful-substances-to-air/2025/13-arsenic-province-air-en.csv
Facility-based arsenic emissions to air by province and territory, Canada, 2003, 2013 and 2023 – French (CSV; 1.99 kB) CSV https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/emissions-of-harmful-substances-to-air/2025/13-arsenic-province-air-fr.csv
Percentage change of mercury, lead and cadmium emissions from 1990 level and arsenic emissions from 1993 level, Canada – French (CSV; 2.05 kB) CSV https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/emissions-of-harmful-substances-to-air/2025/1-changement-pourcentage-air-fr.csv
Percentage change of mercury, lead and cadmium emissions from 1990 level and arsenic emissions from 1993 level, Canada – English (CSV; 1.78 kB) CSV https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/emissions-of-harmful-substances-to-air/2025/1-percentage-change-air-en.csv
Mercury emissions to air by source, Canada, 1990 to 2023 – French (CSV; 3.06 kB) CSV https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/emissions-of-harmful-substances-to-air/2025/2-mercure-source-air-fr.csv
Mercury emissions to air by source, Canada, 1990 to 2023 – English (CSV; 2.70 kB) CSV https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/emissions-of-harmful-substances-to-air/2025/2-mercury-source-air-en.csv
Mercury emissions to air by province and territory, Canada, 1994, 2013 and 2023 – French (CSV; 2.02 kB) CSV https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/emissions-of-harmful-substances-to-air/2025/3-mercure-province-air-fr.csv
Mercury emissions to air by province and territory, Canada, 1994, 2013 and 2023 – English (CSV; 1.55 kB) CSV https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/emissions-of-harmful-substances-to-air/2025/3-mercury-province-air-en.csv
Global mercury emissions to air, 2015 – English (CSV; 1.64 kB) CSV https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/emissions-of-harmful-substances-to-air/2025/5-mercure-mondiale-fr.csv
Global mercury emissions to air, 2015 - French (CSV; 1.64 kB) CSV https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/emissions-of-harmful-substances-to-air/2025/5-mercure-mondiale-fr.csv
Lead emissions to air by source, Canada, 1990,to 2023 – English (CSV; 3.01 kB) CSV https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/emissions-of-harmful-substances-to-air/2025/6-lead-source-air-en.csv
Lead emissions to air by source, Canada, 1990,to 2023 – French (CSV; 3.34 kB) CSV https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/emissions-of-harmful-substances-to-air/2025/6-plomb-source-air-fr.csv
Lead emissions to air by province and territory, Canada, 1994, 2013 and 2023 – English (CSV; 1.74 kB) CSV https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/emissions-of-harmful-substances-to-air/2025/7-lead-province-air-en.csv
Lead emissions to air by province and territory, Canada, 1994, 2013 and 2023 – French (CSV; 2.07 kB) CSV https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/emissions-of-harmful-substances-to-air/2025/7-plomb-province-air-fr.csv
Cadmium emissions to air by source, Canada, 1990 to 2023 – English (CSV; 2.75 kB) CSV https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/emissions-of-harmful-substances-to-air/2025/9-cadmium-source-air-en.csv
Cadmium emissions to air by source, Canada, 1990 to 2023 – French (CSV; 3.09 kB) CSV https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/emissions-of-harmful-substances-to-air/2025/9-cadmium-source-air-fr.csv
Emissions of harmful substances to air – English HTML https://www.canada.ca/en/environment-climate-change/services/environmental-indicators/emissions-harmful-substances-air.html
Data sources and methods – English HTML https://www.canada.ca/en/environment-climate-change/services/environmental-indicators/emissions-harmful-substances-air.html#DSM
Emissions of harmful substances to air – French HTML https://www.canada.ca/fr/environnement-changement-climatique/services/indicateurs-environnementaux/emissions-substances-nocives-air.html
Data sources and methods – French HTML https://www.canada.ca/fr/environnement-changement-climatique/services/indicateurs-environnementaux/emissions-substances-nocives-air.html#DSM

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