Table 5.4

Table 5.4 U.S. Emissions of Sulfur Dioxide by Source, Ten-Year Intervals, 1940-1980, and Annually, 1989-1998

Industrial processes

Petro- Storage Waste

Chemical Metals leum Other Solvent and disposal Total

indus- pro- indus- indus- utili- trans- and indus-

Year tries cessing tries tries zation port recycling trial

million tons

1940 0.215 3.309 0.224 0.334 na na 0.003 4.085

1950 0.427 3.747 0.340 0.596 na na 0.003 5.113

1960 0.447 3.986 0.676 0.671 na na 0.010 5.790

1970 0.591 4.775 0.881 0.846 na na 0.008 7.100

1980 0.280 1.842 0.734 0.918 na na 0.033 3.773

1989 0.440 0.695 0.429 0.405 0.001 0.005 0.036 2.010

1990 0.297 0.726 0.430 0.399 0.000 0.007 0.042 1.900

1991 0.280 0.612 0.378 0.396 0.000 0.010 0.044 1.721

1992 0.278 0.615 0.416 0.396 0.001 0.009 0.044 1.758

1993 0.269 0.603 0.383 0.392 0.001 0.005 0.071 1.723

1994 0.275 0.562 0.379 0.398 0.001 0.002 0.060 1.676

1995 0.286 0.530 0.369 0.403 0.001 0.002 0.047 1.637

1996 0.291 0.429 0.337 0.350 0.001 0.003 0.041 1.452

1997 0.296 0.450 0.346 0.365 0.001 0.003 0.042 1.503

1998 0.299 0.444 0.345 0.370 0.001 0.003 0.042 1.503

Fuel combustion Non- Total

Electric Indus- On-road road Miscel- all

Year utilities trial Other Total vehicles sources laneous sources

million tons

1940 2.427 6.060 3.642 12.129 0.003 3.190 0.545 19.953

1950 4.515 5.725 3.964 14.204 0.103 2.392 0.545 22.358

1960 9.264 3.864 2.319 15.447 0.114 0.321 0.554 22.227

1970 17.398 4.568 1.490 23.456 0.411 0.083 0.110 31.161

1980 17.469 2.951 0.971 21.391 0.521 0.175 0.011 25.905

1989 16.215 3.086 0.624 19.924 0.570 0.779 0.011 23.293

1990 15.909 3.550 0.831 20.290 0.542 0.916 0.012 23.660

1991 15.784 3.256 0.755 19.796 0.570 0.944 0.011 23.041

1992 15.416 3.292 0.784 19.493 0.578 0.968 0.010 22.806

1993 15.189 3.284 0.772 19.245 0.517 0.972 0.010 22.466

1994 14.889 3.218 0.780 18.887 0.301 0.990 0.015 21.870

1995 12.080 3.357 0.793 16.230 0.304 0.999 0.010 19.181

1996 12.631 3.022 0.667 16.320 0.316 1.016 0.017 19.121

1997 13.090 2.964 0.677 17.732 0.322 1.050 0.016 19.622

1998 13.217 2.895 0.609 16.722 0.326 1.084 0.012 19.647

Source: U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, National Air Quality and Emissions Trends Report, 1998, Table A-8 (EPA, OAQPS, Research Triangle Park, NC, 2000), and earlier reports in this series.

Notes: na = not available. Non-road sources include marine vessels and railroads. Miscellaneous include fugitive dust and other combustion.

Last Updated on Tuesday, May 2, 2000

	Industrial processes
			Petro-			Storage	Waste
	Chemical	Metals	leum	Other	Solvent	and	disposal	Total
	indus-	pro-	indus-	indus-	utili-	trans-	and	indus-
Year	tries	cessing	tries	tries	zation	port	recycling	trial

	million tons

1940	0.215	3.309	0.224	0.334	na	na	0.003	4.085
1950	0.427	3.747	0.340	0.596	na	na	0.003	5.113
1960	0.447	3.986	0.676	0.671	na	na	0.010	5.790
1970	0.591	4.775	0.881	0.846	na	na	0.008	7.100
1980	0.280	1.842	0.734	0.918	na	na	0.033	3.773
1989	0.440	0.695	0.429	0.405	0.001	0.005	0.036	2.010
1990	0.297	0.726	0.430	0.399	0.000	0.007	0.042	1.900
1991	0.280	0.612	0.378	0.396	0.000	0.010	0.044	1.721
1992	0.278	0.615	0.416	0.396	0.001	0.009	0.044	1.758
1993	0.269	0.603	0.383	0.392	0.001	0.005	0.071	1.723
1994	0.275	0.562	0.379	0.398	0.001	0.002	0.060	1.676
1995	0.286	0.530	0.369	0.403	0.001	0.002	0.047	1.637
1996	0.291	0.429	0.337	0.350	0.001	0.003	0.041	1.452
1997	0.296	0.450	0.346	0.365	0.001	0.003	0.042	1.503
1998	0.299	0.444	0.345	0.370	0.001	0.003	0.042	1.503

	Fuel combustion					Non-		Total
	Electric	Indus-			On-road	road	Miscel-	all
Year	utilities	trial	Other	Total	vehicles	sources	laneous	sources

	million tons

1940	2.427	6.060	3.642	12.129	0.003	3.190	0.545	19.953
1950	4.515	5.725	3.964	14.204	0.103	2.392	0.545	22.358
1960	9.264	3.864	2.319	15.447	0.114	0.321	0.554	22.227
1970	17.398	4.568	1.490	23.456	0.411	0.083	0.110	31.161
1980	17.469	2.951	0.971	21.391	0.521	0.175	0.011	25.905
1989	16.215	3.086	0.624	19.924	0.570	0.779	0.011	23.293
1990	15.909	3.550	0.831	20.290	0.542	0.916	0.012	23.660
1991	15.784	3.256	0.755	19.796	0.570	0.944	0.011	23.041
1992	15.416	3.292	0.784	19.493	0.578	0.968	0.010	22.806
1993	15.189	3.284	0.772	19.245	0.517	0.972	0.010	22.466
1994	14.889	3.218	0.780	18.887	0.301	0.990	0.015	21.870
1995	12.080	3.357	0.793	16.230	0.304	0.999	0.010	19.181
1996	12.631	3.022	0.667	16.320	0.316	1.016	0.017	19.121
1997	13.090	2.964	0.677	17.732	0.322	1.050	0.016	19.622
1998	13.217	2.895	0.609	16.722	0.326	1.084	0.012	19.647