



Overview
The National Pollutant Inventory (NPI) is a publicly accessible database with information on the types and amounts of substance emissions to the Australian environment.
Every year Australian industrial facilities that exceed the specified thresholds of the 93 NPI substances calculate and report their emissions to air, land and water. The NPI also holds some data for diffuse sources whose emissions are aggregated together, including emissions from motor vehicles. Diffuse data are not collected annually and may be from varying years.
Examples from the latest emission data are provided to illustrate what you can find in the NPI database and web site.
Adding together emissions of different substances does not provide a measure of total pollution. This is because NPI substances have different properties and toxicities. A small emission of a highly toxic substance may be more significant than a large emission of a far less toxic material.
The disclaimer has further information about using NPI data.
Pollution control is the responsibility of state and territory governments.