Chart air quality data
What’s new
Air quality categories for PM2.5 and sulfur dioxide have been updated to align with changes to national guidelines
About Sulfur dioxide
Sulfur dioxide (SO2) is a colourless gas with a sharp, irritating odour. It is produced by burning fossil fuels and by the smelting of mineral ores that contain sulfur.
The guideline for Sulfur dioxide is 0.075ppm (1hr avg).
Sulfur dioxide is measured in parts per million.
