Table 4-43: Estimated National Emissions of Particulate Matter (PM-10)a
Table 4-43: Estimated National Emissions of Particulate Matter (PM-10)a
(Million short tons)
| 1970 | 1975 | 1980 | 1985 | 1990 | 1991 | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | (R) 2003 | (R) 2004 | (R) 2005 | (R) 2006 | (R) 2007 | 2008 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Total all sources | 13.02 | 7.56 | 7.01 | 41.32 | 27.75 | 27.35 | 27.10 | 27.36 | 28.61 | 25.82 | 22.86 | 22.91 | 22.89 | 22.57 | 22.96 | 22.94 | 18.43 | 18.38 | 18.32 | 18.27 | 16.15 | 14.03 | 11.92 | 
| Highway vehicles | 0.48 | 0.46 | 0.43 | 0.41 | 0.39 | 0.37 | 0.35 | 0.34 | 0.32 | 0.30 | 0.29 | 0.27 | 0.26 | 0.24 | 0.23 | 0.21 | 0.20 | 0.20 | 0.20 | 0.19 | 0.19 | 0.18 | 0.17 | 
| Off-Highway | 0.16 | 0.21 | 0.26 | 0.30 | 0.33 | 0.33 | 0.33 | 0.34 | 0.34 | 0.34 | 0.34 | 0.34 | 0.33 | 0.34 | 0.32 | 0.32 | 0.31 | 0.32 | 0.33 | 0.35 | 0.33 | 0.32 | 0.30 | 
| Fuel combustion | 2.87 | 2.25 | 2.45 | 1.54 | 1.20 | 1.15 | 1.18 | 1.12 | 1.11 | 1.18 | 0.91 | 0.91 | 0.84 | 0.85 | 0.89 | 0.94 | 0.54 | 0.53 | 0.51 | 0.49 | 0.46 | 0.42 | 0.38 | 
| Industrial processesb | 7.67 | 3.70 | 2.75 | 1.06 | 1.04 | 0.99 | 0.99 | 0.91 | 0.91 | 0.95 | 0.65 | 0.67 | 0.67 | 0.50 | 0.51 | 0.54 | 1.05 | 1.00 | 0.95 | 0.91 | 0.89 | 0.87 | 0.86 | 
| Waste disposal and recycling | 1.00 | 0.37 | 0.27 | 0.28 | 0.27 | 0.28 | 0.28 | 0.33 | 0.31 | 0.29 | 0.45 | 0.47 | 0.49 | 0.47 | 0.36 | 0.36 | 0.24 | 0.23 | 0.23 | 0.23 | 0.23 | 0.23 | 0.23 | 
| Miscellaneousc | 0.84 | 0.57 | 0.85 | 37.74 | 24.54 | 24.23 | 23.96 | 24.33 | 25.62 | 22.77 | 20.22 | 20.25 | 20.31 | 20.18 | 20.64 | 20.57 | 16.10 | 16.10 | 16.10 | 16.10 | 14.05 | 12.01 | 9.97 | 
KEY: R = revised.
a Fine particulate matter less than 10 microns. Data include
	  PM without condensibles.
	  b Industrial processes consists of chemical and allied
	  product manufacturing, metals processing, petroleum and related
	  industries, other industrial
	  processes; solvent utilization; and storage and transport.
	  c In 1985 there appears to
	  be a spike in miscellaneous emissions. This is likely due to a methodological
	  change, and the EPA does not change historical data when it changes its
	  methodology.
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 October 2009.