2010 Progress Report - International Joint Commission

Progress Report 2010
SECTION 3
Scientific and Technical
Cooperation and Research
Emission Inventories and Trends
The United States and Canada have
updated and improved their emission
inventories and projections on PM 10
,
PM 2.5
, VOCs, NO x
, and SO 2
to refl ect
the latest information available.
These emissions inventories were also processed
for U.S. and Canadian air quality models to support
the technical assessment of air quality problems
and for the development of air quality management
strategies. In the United States, the most recent
complete emission inventory data are for the year 2005.
The 2008 emission data in this 2010 Progress Report
were developed as an interpolation between the 2005
NEI and a 2009 projection inventory. The inventories
and projections are available at www.epa.gov/ttn/chief/
eiinformation.html. The 2009 projection inventory
was originally prepared for possible inclusion with the
emissions processing and air quality modelling in support
of future EPA regulatory analyses (see CAP 2002-Based
Platform Version 3, available at www.epa.gov/ttn/chief/
emch). For Canada, the 2008 emissions inventory
was developed using the latest emission estimation
methods and statistics, and includes the pollutant
JO
INT EFFORTS
emissions information reported by more than
8700 facilities to the NPRI for 2008. The Canadian
inventories and projections are available at .
Emission data for both countries for 2008 are
presented in Figures 27, 28, 29 and 30. Figure 27
shows the distribution of emissions by source category
grouping for SO 2
, NO x
and VOC. The following
observations can be made from this fi gure:
• SO 2
emissions in the United States stem primarily from
coal-fi red combustion in the electric power sector.
• Canadian SO 2
emissions come mostly from the nonferrous
smelting and refi ning industry, the upstream
petroleum industry and electric power generation
utilities. The contribution from electric power
generation utilities is lower in Canada due to the
large hydroelectric and nuclear capacity in place.
• The distribution of NO x
emissions in the two
countries is similar, with non-road and on-road
vehicles accounting for the greatest portion of
NO x
emissions.
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