B.C. Air Quality

Emissions Inventories

An emissions inventory is a complex process that involves estimating and compiling emissions activity from hundreds of point, area and mobile sources in an airshed (see Emissions: An Introduction for an explanation of these terms).

Individual airshed inventories can be compiled to get an overall regional, provincial or national emissions inventory.

Emissions inventories are an important tool and can be used to:

  • support air quality modelling;
  • support health assessments;
  • analyze emission control costs; and
  • develop regulatory control strategies.

In British Columbia, the provincial government and Metro Vancouver compile inventories on a five-year cycle. The most recent inventories were compiled for the year 2010. For a list of emissions inventories in B.C., see Historical Emissions Inventories.

The federal government also collects and compiles inventories through Environment Canada's National Pollutant Release Inventory (NPRI) program. The NPRI is a publicly accessible inventory of pollutants from industrial, institutional and commercial facilities across Canada. NPRI mapping tools and resources are available from on the NPRI mapping website.

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