Please note all data shown on this site is in Australian Eastern Standard Time (AEST) and is not adjusted for Daylight Saving Time (DST).

Note: Full date, time and data values can be seen by hovering the mouse over the dataset.

To view data by location, please use the filter in the top right hand corner of the graph. Time range can also be adjusted using the filter.

The line graph represents the 24 hour rolling average of PM 2.5 at ACT Health air monitoring stations. It is most useful for knowing the average PM 2.5 levels in the air in the ACT over the past 24 hours at a point in time and the corresponding current health advice.

The bar graph shows hourly readings of PM 2.5 at ACT Health air monitoring stations and is most useful for identifying short term fluctuations in air quality from smoke events.

The coloured dotted lines across the graph represent the 7 health categories based on the 24 hour rolling average of PM 2.5 .

Whilst exposure to high levels of PM 2.5 for less than 24 hours may have health effects for some people, there is currently limited research available to estimate these health risks for shorter exposures. Air Quality Index (AQI) is a national standard for air quality and is not represented on this graph. More information on AQI and its associated 6 category system is available at our current air quality page and our Air Quality Index page.

Please note: data may be subject to further modification and validation. Gaps in the data indicate an instrument was briefly offline or not enough data was collected during the time period.