Help - search air quality data

Step 1 - Data category

Regional AQI

Use this selection to obtain daily or hourly Regional Air Quality Index data for a region or regions of interest. Pollutants and Meteorological variables selection boxes are greyed out and not available for selection.

Site AQI

Use this selection to obtain daily or hourly Air Quality Index data for individual sites within each region. Pollutants and Meteorological variables selection boxes are greyed out and not available for selection.

Site averages

  • For PM10, PM2.5, NO2 and SO2, daily averages are based on hourly data.
  • For Ozone, averages can be based on hourly or rolling 4 hour averages
  • For CO, averages can be based on hourly or rolling 8 hour averages.
  • For PM10 and PM2.5, monthly and yearly site averages are based on daily average data.
  • For NO2 and SO2, the monthly and yearly site averages are based on hourly averages.

Site maximums

  • For PM10 and PM2.5 - the daily site maximum is based on hourly data.  The monthly and yearly site maximums are based on 24hr averages.
  • For CO - the daily, monthly and yearly site maximums are based on 8hr rolling averages.
  • For Ozone - the daily, monthly and yearly site maximums can be calculated using either 4hr rolling averaged data or hourly data
  • For all other pollutants - the daily, monthly and yearly site maximums are based on hourly data

Site exceedences

  • For PM10 - as there is no NEPM standard for 1 hour PM10, daily exceedences are not able to be calculated and the PM10 selection button is greyed out in Step 2.  The monthly and annual exceedences are calculated against the NEPM health standard of 50 ug/m3 using 24 hour averaged data.
  • For PM2.5 - as there is no NEPM standard for 1 hour PM2.5, daily exceedences are not able to be calculated and the PM2.5 selection button is greyed out in Step 2.  The monthly and annual exceedences are calculated against the NEPM advisory reporting standard of 25 ug/m3 using 24 hour averaged data.
  • For CO - exceedences are calculated against the NEPM health standard of 9.0ppm for an 8hr rolling average.
  • For Ozone - exceedences are calculated against NEPM health standards of 0.08ppm for a 4hr rolling average and 0.10ppm for a 1hr average.
  • For all other pollutants - exceedences are calculated against relevant NEPM health standards based on hourly data.

More information on NEPM standards

Step 1 – Parameter

Pollutants and Meteorological variables

If any of Site averages, Site maximums or Site exceedences are selected, then Pollutants selection boxes become available for selection. 

Meteorological variables selection boxes are only available if Site averages (Hourly) is selected – AQI, maximums and exceedences are not calculated for meteorological data.

Step 2 – Regions/Sites

The Region/Site selection in Step 2 is dependent on the type of parameters selected in Step 1.

  • If Regional values are selected in Step 1, then only the regions are displayed for selection. 
  • If Site values, Site averages, Site maximums or Site exceedences are selected, then individual sites become available for selection.

Step 3 – Date selection, data display and download

Data display

The data can be output either as

  • html table
  • graph
  • comma-separated file in csv format for import into spreadsheet applications. 

If 'Display data as graph' is selected, a graph will be presented on a new page, as shown in the image below.

To amend your initial query selections, click the Back button on the data form.

Graph data display

The date range shown on the graph can be expanded or contracted using the series of icons displayed in the bar above the graph as indicated below.

  1. Date selector - use this to select absolute dates required to be displayed and press the Refresh icon. The data will be displayed with the updated date range.
    Refresh icon
  2. Contraction - the date range can be contracted by the number of days, weeks, months or years selected with the list boxes.
    List box
  3. Expansion - the date range can be expanded by the number of days, weeks, months or years selected with the list boxes.
  4. Mouse selection - on the graph, the date range can be changed by using the mouse to paint the area to be displayed
  5. Zoom facility - date range can be changed by increasing/decreasing the size of the grey box.  This selector can be dragged to a new position or the black bars can be dragged to the range required.  Double clicking in the grey area of this box will display the graph with the new date range.
  6. Save file - the graph may be saved as an html, pdf or image file by pressing the Load button.  The format can be selected using the list box.

Search results displayed as a graph

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Page last updated: 21 December 2017