The map above shows hourly average data for all parameters, i.e., PM10, PM2.5, NO 2 , SO 2 , NH 3 , wind speed and wind direction values. All readings are updated hourly. Note that the map shows hourly averages for PM10 and PM2.5, and not rolling 24-hour averages as was the case prior to February 2020.

The hourly values for pollutants are categorised into the following air quality ratings:

These air quality categories are based on the (NEPM) standards for hourly NO 2 and SO 2 , and interim web reporting threshold values for hourly PM 10 and PM 2.5.

This information is also available by calling the NSW EES Environment Line: 131 555 (local call cost throughout NSW) or (02) 9995 5555 (if calling from outside NSW).

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.