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Key departmental publications, e.g. annual reports, budget papers and program guidelines are available in our online archive.

Much of the material listed on these archived web pages has been superseded, or served a particular purpose at a particular time. It may contain references to activities or policies that have no current application. Many archived documents may link to web pages that have moved or no longer exist, or may refer to other documents that are no longer available.

Cover of National in-service emissions study

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Second national in-service emissions study (NISE2)

Light duty petrol vehicle emissions testing
Department of the Environment and Heritage, March 2009

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Summary documents

Main Phase

Preliminary Phase

About the study

This major study of the emissions from petrol engine vehicles provides current, robust emissions data for the purposes of emissions modelling, and to inform policy development for vehicle emissions management.

Vehicle emissions modelling is an important tool when developing strategies to manage and improve air quality.  Motor vehicles are a major source of common air pollutants, including hydrocarbons (HC), volatile organic compounds (VOCs), and oxides of nitrogen (NOx).  In the Sydney air shed, for example, motor vehicle exhaust emissions contribute over 71 per cent of NOx and over 38 per cent of VOCs, excluding emissions associated with refuelling.  NOx and VOCS are major contributors to smog.

The full testing phase of the NISE2 study began in December 2007 and finished in December 2008. Approximately 350 petrol vehicles manufactured from 1994 to 2007 were tested over a period of 12 months. The results provide up-to-date vehicle emissions factors for the current petrol fleet and demonstrate the changes in emissions technology since the first national in-service emissions study  (NISE1) was conducted in 1996. The NISE2 study includes local and imported vehicles, four wheel drives and light commercial vehicles.

If you would like a copy of the NISE2 community summary, the NISE2 technical summary or the NISE2 emissions database CD, please contact the Community Information Unit of the Department of the Environment, Water, Heritage and the Arts at email: ciu@environment.gov.au or
freecall: 1800 803 772.