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Figure 7-15 Indexes of Key Air Pollutant Emissions from U.S. Transportation: 1990-2014

Wednesday, February 22, 2017

Graphic Version | Excel

Index: 1990 = 1.0

Indices 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014
Particulate Matter - PM 2.5 0.75 0.72 1.07 1.03 0.99 0.96 0.90 0.85 0.78 0.72 0.66 0.65 0.62 0.58 0.55
Particulate Matter - PM 10 0.77 0.74 1.07 1.03 1.00 0.96 0.92 0.89 0.83 0.77 0.71 0.83 0.78 0.73 0.68
Nitrous oxide - NOx 0.94 0.89 1.14 1.07 1.01 0.94 0.89 0.84 0.78 0.72 0.67 0.67 0.62 0.58 0.54
Volatile organic compounds - VOC 0.66 0.63 0.59 0.57 0.55 0.52 0.52 0.51 0.46 0.43 0.42 0.42 0.39 0.36 0.33
Sulfur dioxide - SO2 0.80 0.79 1.16 1.03 0.91 0.78 0.58 0.38 0.28 0.28 0.18 0.18 0.16 0.14 0.11
Carbon Monoxide 0.70 0.67 0.56 0.54 0.52 0.49 0.46 0.43 0.39 0.33 0.33 0.32 0.31 0.29 0.28
Ammonia - NH3 1.49 1.51 0.85 0.83 0.82 0.80 0.80 0.80 0.76 0.73 0.71 0.68 0.65 0.63 0.60

SOURCE: U.S. Environmental Protection Agency, National Emissions Inventory Air Pollutant Emissions Trends Data, 1970-2014, Average Annual Emissions All Criteria Pollutants, Available at https://www.epa.gov/air-emissions-inventories/air-pollutant-emissions-trends-data as of April 2016.