Understanding air quality data

Learn about air quality information, find out what air quality index values are and how we calculate them.

We report on air quality in near real-time using up-to-date, accurate data on hourly and daily basis. Air quality is presented as air quality index (AQI) values and ratings. We also report concentration data for these periods. On a daily basis every afternoon, we issue a next-day air quality forecast for Sydney. We share this information in various ways:

  • in tables, maps and text
  • by pollutant, location (site, region) and time
  • on our website, via email/SMS subscription, and in reports.