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The National Pollutant Inventory (NPI) is a publicly accessible database providing information on the emissions of 93 selected substances from industry, transport, commercial premises and household activities to air land and water in Australia.

The NPI is a Commonwealth initiative with each state and territory responsible for implementing the program. In Western Australia, the Department of Environment Regulation (DER) works with industries exceeding reporting thresholds to record their emissions and transfers.

About the NPI

What are the objectives of the NPI?

  • Inform the community based on their 'right to know' about emissions and transfers to water, air and land in the local area and state annually.
  • Provide the emissions and transfers information for specified substances on a geographical basis, including those of a hazardous nature or involving significant impact.
  • Provide information to enhance and facilitate policy formulation and decision making for environmental planning and management.
  • Promote waste minimisation, cleaner production and energy and resource saving programs in industry, government and the community.
  • Encourage a cleaner and healthier environment.
  • Create a database which can be easily accessed and interpreted by the public.

Where does NPI data come from?

Under Commonwealth legislation, all industries that exceed reporting thresholds must report their emissions and transfers annually to the NPI. In Western Australia, the data are assessed by DER and published on the NPI website by the Commonwealth Department of the Environment. Around 850 facilities from more than 80 industry sectors report annually to the NPI in WA.

Non-industrial (or diffuse) sources are also accounted for under the NPI. DER conducts an Aggregated Emissions Data study periodically in selected airsheds and catchments to assess emissions of non-reporting facilities and everyday occurrences/activities, such as driving motor vehicles and other transport, surface coating (e.g. painting), prescribed burns, bush and wood fires, operation of small facilities and mowing the lawn. Diffuse emissions are important as they provide a more comprehensive picture of emissions across Australia.

What substances are included in the NPI program?

A full list of the NPI substances is available on the Commonwealth website.

How do I use the NPI database?

  • Search for emissions of a particular substance in your suburb, e.g. emissions of carbon monoxide in Scarborough.
  • Get a listing of facilities which report to the NPI in the Perth metropolitan area.
  • View facilities emitting the highest levels of NPI-listed substances in Western Australia.
  • Compare Western Australia's emissions to the rest of Australia.
  • Research the pollution control equipment installed at facilities in Western Australia.
  • Learn about the 93 substances included in the NPI and research the top emitters of these substances in Western Australia.
  • View emissions by source - i.e. emissions to water, air and land.
  • View emissions from reporting facilities in Western Australia.


pdfNational Pollutant Inventory WA – commercial in confidence guideline177.36 KB

Guideline for facilities claiming commercial confidentiality for data reported to the Department of Environment Regulation in accordance with the National Environmental Protection (National Pollutant Inventory) Measure.

More information

Further information can be obtained by contacting:
National Pollutant Inventory
Department of Water and Environment Regulation
Locked Bag 10
Joondalup DC
Phone: 08 6467 5277 or (08) 6467 5384
Facsimile:08 9219 8061
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.