Toronto West - Air Quality Health Index

Observed ConditionsFootnote †

  • Past 24 hr
  • AQHI by Station
    • Calculated at: 9:00 AM EDT Saturday 5 July 2025

    2Low Risk




    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    +

    Low Risk
    (1-3)

    Moderate Risk
    (4-6)

    High Risk
    (7-10)

    Very High Risk



    At-Risk Population:

    General Population:

    • Ideal air quality for outdoor activities.

    Forecast Maximums

  • Next 24 hr
  • Health Message
    • Issued at: 6:00 AM EDT Saturday 5 July 2025

    Saturday

    4 - Moderate Risk

    Saturday night

    4 - Moderate Risk

    Sunday

    4 - Moderate Risk

    Sunday night

    4 - Moderate Risk

    Who is at risk?

    People with heart and lung conditions are most affected by air pollution.

    To find out if you are at risk, consult the health guide, or your physician.

    Visit the national AQHI Web site to learn more about the AQHI.

    Did you know...?

    Taking steps to reduce air pollution also helps slow global warming.


    The AQHI is an initiative between Environment Canada, Health Canada and the Province of Ontario.