Air Quality Index (AQI) data - updated hourly

Air quality readings are updated hourly and a daily air quality forecast is made for the Greater Sydney Metropolitan Region at 4pm each day.

The AQI provides a comparison of air pollutants, standardising measurements of ozone, carbon monoxide, sulfur dioxide, nitrogen dioxide, airborne particles and visibility into one easy-to-understand index.

Updates Smoke from hazard reduction burning and domestic wood heating will occasionally cause elevated particle levels over the cooler months.

New South Wales is now reporting hourly averages for PM10 and PM2.5. More information

Bushfire season has now started in NSW. Please monitor Fires Near Me by the RFS for the location of fires. NSW Health provides information on how to protect yourself from bushfire smoke.

Disclaimer:The data used in the compilation of this page have undergone only preliminary quality assurance checks. These data may require modification during final stages of validation as a result of calibration changes, power failures, instrument failures etc.