Air quality monitoring reports

NSW Annual Air Quality Statements

These reports provide an annual summary analysis of air quality data from the 43 station NSW air quality monitoring network.

NSW Annual NEPM Compliance Reports

The national Ambient Air Quality NEPM requires NSW and other jurisdictions to submit a calendar year annual report and data assessment on air quality monitoring to COAG by 30 June in the next year following.

Reports provided by NSW OEH as part of this process are listed below:

Important changes to reporting since July 2008

Historical data from 1994 to current is now searchable using the data search facility.

Important changes to reporting July 1998 - December 2007

Quarterly air quality monitoring reports have been produced since July 1975. Over time presentation and reporting of data have changed. The changes made in the 3rd quarter 1998 report, in relation to previous reports, are as follows:

  • Other than the NSW government long-term reporting goals, the exceedences reported previously were against NHMRC guidelines. The exceedences reported in this report are against NEPM standard levels (the maximum concentrations as outlined in the NEPM standards for ambient air quality). This report does not take allowable exceedences as specified under the NEPM into account.
  • Previously, the monthly averages calculated were geometric means. The monthly averages calculated in the quarterly air quality monitoring reports are arithmetic means.
  • The 90-percentile values calculated previously were the estimated 90-percentiles based on the assumption that the distribution was log-normal. The 90-percentile values in the quarterly air quality monitoring reports are true 90-percentiles based on the actual data sets. Please refer to the Calculation of Averages and Spread section for calculation details.
  • Data with less than 25% data availability is shown as data not available (***).
  • The EPA used the Sydney Pollution Index (SPI) to report daily pollution levels from 1978 to 1993. The SPI provided a single index for the Sydney region. It was replaced by the Regional Pollution Index (RPI) in March 1993, providing information on pollution levels for five regions: three regions in Sydney, the Lower Hunter and the Illawarra. The EPA had continued to report the SPI for historical content. However, in light of current knowledge about air quality in the region, the SPI is no longer considered relevant and will no longer be reported.

Download Quarterly Air Quality Monitoring Reports

Please note that the Campbelltown ozone and oxides of nitrogen data and the Camden ozone data are industry-supplied data and have not undergone EPA QA/QC procedures. These data are reproduced in the quarterly reports as they were received by the then EPA.












Errata issued for Quarterly Air Quality Monitoring Reports

Occasionally, as part of the ongoing quality assurance process, it is necessary to correct data that has been included in the quarterly air quality reports. If erroneous data is found, reports are re-issued.

The following quarterly reports have been re-issued:

2nd quarter 2001 - This report was re-issued on 23 May 2002 with the following tables updated:

  • Table 4.2: Total suspended particulates at Earlwood for April 2001
  • Table 7: Lead at Earlwood for April 2001

3rd quarter 1998 - This report was re-issued on 17 January 2003 with the following table updated:

  • Table 4.5: Particulate matter: By Tapered Element Oscillating Microbalance (TEOM-PM2.5) as the table header was incorrect


More information


NSW OEH Environment Line

131 555 (for the cost of a local call within NSW (mobiles excluded))



OEH wishes to thank and acknowledge various government agencies, local councils, private organisations and individuals who have assisted in the conduct of its air quality monitoring program.


Page last updated: 19 May 2017