Current Ground-Level Ozone - O3 (8 hour average) Data Map

View the latest O3 data. Data is refreshed every 60 minutes. Instructions on how to use the map are below.

O3 ppb (8hr)

63 +
* Exceeding 8-hr Objective.
31 - 63
0 - 31
No O3 data

View this map in full screen.

Pollutant Objective

63 ppb

*An Air Quality Objective is the provincial acceptable limit for O3 concentration, averaged over an 8-hour period.

Read more about the province's Air Quality Objectives and Standards.


How to use the map

  • Navigate: Use your mouse to click and drag the map to a desired location
  • Zoom in to view individual stations: Use the + and - buttons on the top left of the map to increase or decrease the magnification size of the map
  • View station data: All circles represent an air monitoring stations. Click on a circle to view that station's data and related information.
  • Reset Map: Use the Home Button to reset the map.

Abbreviations

  • PM2.5 = fine particles with a diameter of 2.5 microns (millionths of a metre)
  • PM10 = small particles with a diameter of 10 microns
  • O3 = ozone
  • NO2 = nitrogen dioxide
  • SO2 = sulphur dioxide
  • ppb = parts per billion
  • ppm = parts per million
  • µg/m3 = micrograms per cubic metre
  • N/A = Readings are monitored but are not available at this time.

Data

Data is refreshed every 60 minutes. View our data license agreement and disclaimer.

More Information

If you have a comment or concern about the air quality content on this website please contact us.

There are more ways to find an air monitoring station and it's latest data.