Air pollutant emissions

The Canadian Environmental Sustainability Indicators (CESI) program provides data and information to track Canada's performance on key environmental sustainability issues. The Air pollutant emissions indicators track emissions from human activities of 6 key air pollutants: sulphur oxides (SOX), nitrogen oxides (NOX), volatile organic compounds (VOCs), ammonia (NH3), carbon monoxide (CO) and fine particulate matter (PM2.5). Black carbon, which is a component of PM2.5, produced by combustion, is also reported. Sectoral indicators on air pollutant emissions from the oil and gas industry, transportation, off-road vehicles and mobile equipment and electric utilities provide additional analysis on the largest sources of Canada's air pollutant emissions.

For each air pollutant, the indicators are provided at the national and provincial/territorial levels. They also identify the major sources of emissions and provide links to detailed information on air pollutant emissions from facilities. The Air pollutant emissions indicators are intended to inform Canadians and decision makers about progress made towards reducing emissions from human-related sources of air pollutants and about the effectiveness of emission reduction measures in reducing emissions to improve ambient air quality in Canada. 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

Data and Resources

Additional Info

Field Value
Last Updated April 17, 2026, 19:53 (UTC)
Created April 17, 2026, 19:53 (UTC)
contact_email enviroinfo@ec.gc.ca
contact_person {"en": "Government of Canada; Environment and Climate Change Canada; Public Inquiries Centre, , enviroinfo@ec.gc.ca", "fr": "Gouvernement du Canada; Environnement et Changement climatique Canada; Centre de renseignements publics, , enviroinfo@ec.gc.ca"}
criticality_level []
data_dictionary []
geographic_scope ["0"]
open_canada_collection primary
open_canada_date_published 2025-06-26 04:00:00
open_canada_keywords {"en": ["Environment", "Sustainable development", "Geographic data", "Air pollution", "Toxic substances", "Environmental indicators", "CESI", "environmental indicators", "air and climate", "air pollution", "national", "emissions", "air pollutants", "volatile organic compounds", "nitrogen oxides", "sulphur oxides", "fine particulate matter", "carbon monoxide", "ammonia", "Air Pollutant Emissions", "APEI"], "fr": ["Environnement", "Développement durable", "Données géographiques", "Pollution atmosphérique", "Substance toxique", "Indicateur environnemental", "ICDE", "indicateurs environnementaux", "indicateur environnemental", "air et climat", "pollution de l'air", "à l'échelle nationale", "émissions", "atmosphériques polluantes", "composés organiques volatils", "oxydes d'azote", "oxydes de soufre", "particules fines", "monoxdye de carbone", "ammoniac", "smog", "pluies acides", "Inventaire des émissions de polluants atmosphériques", "IEPA"]}
open_canada_subject ["nature_and_environment"]
sensitivity_level unrestricted
title_fr Émissions de polluants atmosphériques
update_frequency as_needed