National Pollutant Release Inventory (NPRI) Toolbox


ToolboxThe NPRI Toolbox is a compilation of materials to assist persons required to submit information in response to Notices issued under s.46 of the Canadian Environmental Protection Act, 1999 (CEPA).

The Toolbox consists of General NPRI Reporting Tools which could apply to a broad range of facilities as well as Sector-Specific Tools and resources which are consolidated in the table below.

Please note that the Toolbox does not contain an exhaustive list of all relevant reporting tools related to the NPRI. Other site-specific tools to estimate emissions may exist and be appropriate in individual circumstances. Persons submitting information to the NPRI should exercise professional judgement, knowledge and care to determine and to use the best information available for their emission estimation needs.

General NPRI Reporting Tools

  1. General Guidance
  2. General Information on Emission Factors and Emission Estimation Techniques
  3. Useful Equations and Conversion Factors
  4. Example Calculations
  5. Software
  6. Information on Fuel Combustion and Fugitive Emission Sources
  7. Miscellaneous Resources and Other Relevant Links
  8. Related Guidance

Sector-Specific Tools

Important Note about the NPRI Toolbox

Some of the information contained within the Toolbox has been provided by external sources. Environment and Climate Change Canada has no direct control over the content, and is not responsible for the accuracy, reliability, currency and completeness of the information supplied by external sources. Users wishing to rely upon this information should consult directly with the source of the information.

The Chemical Abstracts Service (CAS) Registry Number, found in the Toolbox, is the property of the American Chemical Society and any use or redistribution, except as required in supporting regulatory requirements and/or for reports to the government when the information and the reports are required by law or administrative policy, is not permitted without the prior, written permission of the American Chemical Society.


Footnote 1

1. Bailey, R., Global Hexachlorobenzene emissions. Chemosphere 43 (2001)

Return to footnote 1 

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