USA Banner

Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Table 4-41: Estimated National Emissions of Nitrogen Oxides

Wednesday, November 21, 2012

Table 4-41: Estimated National Emissions of Nitrogen Oxides

(Million short tons)

Excel | CSV

  (R) 1970 (R) 1975 (R) 1980 (R) 1985 (R) 1990 (R) 1991 (R) 1992 (R) 1993 (R) 1994 (R) 1995 (R) 1996 (R) 1997 (R) 1998 (R) 1999 (R) 2000 (R) 2001 (R) 2002 (R) 2003 (R) 2004 (R) 2005 (R) 2006 2007
TOTAL 26.88 26.38 27.08 25.76 25.53 25.18 25.26 25.36 25.35 24.96 24.79 24.71 24.35 22.84 22.60 21.55 21.14 20.33 19.52 18.71 17.69 17.03
Highway vehicles 12.62 12.06 11.49 10.93 9.59 9.45 9.31 9.16 9.02 8.88 8.73 8.79 8.62 8.37 8.39 7.77 7.87 7.38 6.90 6.41 5.97 5.56
Off-Highway 2.65 2.97 3.35 3.58 3.78 3.85 3.92 3.98 4.05 4.11 4.18 4.18 4.16 4.08 4.17 4.16 4.51 4.47 4.44 4.40 4.27 4.16
Fuel combustion 10.06 10.49 11.32 10.05 10.89 10.78 10.93 11.11 11.02 10.83 10.51 10.55 10.38 9.20 8.82 8.45 7.49 7.20 6.92 6.63 6.17 6.00
Industrial processesa 0.78 0.54 0.56 0.80 0.80 0.72 0.76 0.74 0.77 0.77 0.80 0.84 0.85 0.78 0.81 0.85 0.95 0.95 0.95 0.95 0.93 0.92
Waste disposal and recycling 0.44 0.16 0.11 0.09 0.10 0.10 0.10 0.12 0.11 0.10 0.16 0.16 0.16 0.16 0.13 0.13 0.11 0.11 0.11 0.11 0.11 0.11
Miscellaneous 0.33 0.17 0.25 0.31 0.37 0.29 0.26 0.24 0.39 0.27 0.41 0.19 0.18 0.25 0.28 0.18 0.21 0.21 0.21 0.21 0.24 0.26

Key: R = revised.

a Industrial processes consists of chemical and allied product manufacturing, metals processing, petroleum and related industries, and other industrial processes; and solvent utilization, storage, and transport.

SOURCE

U.S. Environmental Protection Agency, Clearinghouse for Inventories and Emissions Factors (CHIEF), Current Emission Trends Summaries, available at http://www.epa.gov/ttn/chief/trends/index.html as of December 2008.