National Pollutant Release Inventory

Tracking Pollution in Canada

The National Pollutant Release Inventory (NPRI) is Canada's legislated, publicly accessible inventory of pollutant releases (to air, water and land), disposals and transfers for recycling. It is a key resource for:

  • identifying pollution prevention priorities;
  • supporting the assessment and risk management of chemicals, and air quality modelling;
  • helping develop targeted regulations for reducing releases of toxic substances and air pollutants;
  • encouraging actions to reduce the release of pollutants into the environment; and
  • improving public understanding.

For the 2013 year, close to 8000 facilities reported to the NPRI on more than 300 listed substances. Comprehensive air pollutant emission summaries and trends were compiled by Environment Canada for criteria air contaminants (the main pollutants contributing to smog, acid rain and/or poor air quality), selected heavy metals and persistent organic pollutants.

Pollution Data and Reports

An industrial smokestacks linking to the NPRI "Pollution Data and Reports" page. Simon Wilson © Environment Canada
© Environment Canada

Resources for accessing, analyzing and interpreting information on pollutant releases and transfers in Canada.

Reporting to the NPRI

Reporter working on computer linking to the "Reporting to the NPRI" page. © Environnment Canada
© Environnment Canada


Information for owners or operators of facilities required to report to the National Pollutant Release Inventory.

NPRI Data Search

Find out about pollutant releases and transfers in Canada

National Pollutant Release Inventory Map Layers for use with Google Earth™

The Chemical Substances Portal

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