Information: About Air Quality

Questions about Air Quality

• Frequently Asked Questions
• What is an Air Quality Health Index Forecast?
• What is the Air Quality Health Index?
• Where Does Smog Come From?

What you can do to improve our Air Quality

• Spare the Air Actions
• Kids: What you can do

Ontario's Air Quality Monitoring System

• Monitoring Air Quality
• Monitoring Station Locations
• Monitored Pollutants
  • Ozone
  • Fine Particulate Matter
  • Nitrogen Dioxide
  • Sulphur Dioxide
  • Carbon Monoxide
  • Total Reduced Sulphur Compounds

Data Sets

• Current and Forecast AQHI Readings : Tuesday, July 23, 2019, 11:00 am
• Historical AQHI Readings: From 2015
• Air Quality Alert Statistics: Ontario Smog Events: Ontario Smog Events from 2015 to 2019
• Current Pollutant Data: Tuesday, July 23, 2019, 11:00 am
• Atom News Feeds (XML): Current Air Quality Observations, Forecasts and Alerts
• Historical Air Quality Pollutant Data: Search from 2000 to 2017
• Data Disclaimer

Support and Other Resources

• Air Quality Publications
• Web Links
• Municipal Partners
• Contact Information
• Français