The NPI tracks certain pollution across Australia. It collects data and makes it publicly available on the NPI website.

The NPI has emissions data for 93 toxic substances. An emission is the release or discharge of a substance to the environment. It can be solid, liquid or gas. An emission can enter the environment independently or in other matter.

The NPI shows where emissions come from. Find out more about the NPI.

How we work with the NPI 

We manage the NPI in Victoria. This is under:

Business and industry estimate emissions and transfers, then report them to us.

Not everyone has to report. The National Pollutant Inventory Guide (page 7) covers what applies to your business or industry.

Help with reporting to the NPI

To access the NPI’s ORS, send a completed user registration form to our NPI team.

Contact our NPI team 


Environment Protection Authority

GPO Box 4395

Melbourne VIC 3001


Reviewed 16 December 2019