BTS | Table 4-45: Estimated National Emissions of Sulfur Dioxide

Bureau of Transportation Statistics (BTS) - Research and Innovative Technology Administration (RITA) - United States Department of Transportation (USDOT, US DOT or DOT)

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Table 4-45: Estimated National Emissions of Sulfur Dioxide

(Million short tons)

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	1970	1975	1980	1985	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
TOTAL all sources	31.22	28.04	25.93	23.31	23.08	22.37	22.08	21.77	21.35	18.62	18.39	18.84	18.94	17.54	16.35	15.93	14.62	15.02	14.67	14.63	13.77
Highway vehicles	0.27	0.33	0.39	0.46	0.50	0.47	0.44	0.40	0.37	0.34	0.30	0.30	0.30	0.30	0.26	0.25	0.26	0.24	0.22	0.21	0.19
Off-Highway	0.28	0.30	0.32	0.35	0.37	0.38	0.39	0.39	0.40	0.41	0.41	0.42	0.43	0.48	0.44	0.44	0.52	0.49	0.47	0.45	0.43
Fuel combustion	23.46	22.66	21.39	20.02	20.29	19.80	19.49	19.25	18.89	16.23	16.25	16.65	16.74	15.34	14.16	13.74	12.66	13.09	12.77	12.76	11.93
Industrial processes^a	7.09	4.68	3.77	2.43	1.86	1.68	1.72	1.65	1.62	1.59	1.37	1.43	1.43	1.33	1.38	1.43	1.06	1.07	1.08	1.10	1.11
Waste disposal and recycling	0.01	0.05	0.03	0.03	0.04	0.04	0.04	0.07	0.06	0.05	0.03	0.03	0.03	0.03	0.03	0.04	0.03	0.03	0.03	0.03	0.03
Miscellaneous^b	0.11	0.02	0.01	0.01	0.01	0.01	0.01	0.01	0.02	0.01	0.02	0.01	0.01	0.07	0.07	0.04	0.11	0.10	0.10	0.09	0.09

^aIndustrial processes comprises chemical and allied product manufacturing, metals processing, petroleum and related industries, and other industrial processes; solvent utilization; and storage and transport.

^bMiscellaneous comprises nontransportation-related fugitive dust, agriculture and forestry, nonroad gasoline, nonroad diesel, other nonroad sources and other miscellaneous combustion that could not be accurately allocated to specific source categories.

NOTE

Previous edition's data include all on road mobile sources and some nonroad mobile sources, since EPA changed the methodology to estimate emissions, the details of the data are not available, this data set only contains the on road mobile sources.

SOURCE

U.S. Environmental Protection Agency, Clearinghouse for Inventories and Emissions Factors (CHIEF), Current Emission Trends Summaries, Internet website http://www.epa.gov/ttn/chief/trends/index.html as of July 2007.