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J Air Waste Manag Assoc

Title:		Analysis of PM(10) Trends in the United States from 1988 through 1995
Author(s):		Darlington TL; Kahlbaum DF; Heuss JM; Wolff GT;
Address:		"a Air Improvement Resource, Inc. , Novi , Michigan. b Public Policy Center, General Motors Corporation , Detroit , Michigan"
Journal Title:		J Air Waste Manag Assoc
Year:		1997
Volume:		47
Issue:		10
Page Number:		1070 - 1078
DOI:		10.1080/10473289.1997.10464400
ISSN/ISBN:		2162-2906 (Electronic) 1096-2247 (Linking)
Abstract:		"Because the U. S. Environmental Protection Agency (EPA) has changed the National Ambient Air Quality Standards (NAAQS) for ambient particulate matter (PM), there is a great deal of interest in determining recent PM trends. This paper examines trends in PM(10) (i.e., particulate matter less than 10 micrometers in diameter) for areas of the United States based on their attainment status-for PM(10) and ozone nonattainment and attainment areas. The analysis also focuses on urban, suburban, and rural areas, and eastern and western areas. The time period of evaluation is from 1988 through 1995. To shed further light on the ambient PM(10) trends, trends in ambient SO(2), NO(2), and volatile organic compounds (VOCs) are also analyzed. Finally, trends in emission inventories of SO(2), NO(x), VOCs, and PM(10) are evaluated. Results of the analysis show that widespread and similar reductions in PM(10) levels have occurred over the last seven years. Annual reductions range from 3.0% to 3.8%, with the greatest reductions coming in PM(10) nonattainment areas, but with very significant reductions also in PM(10) attainment areas, ozone attainment areas, and rural areas. The widespread reductions appear to be due to a set of controls or common factors that are having a fairly uniform effect in all of the areas. The consistency of the reductions in different areas suggests that the reductions may also be primarily in the fine particles (i.e., those less than 2.5 micrometers in diameter, or PM(2.5)), which are more readily transported than coarse particles"
Keywords:
Notes:		"PubMed-not-MEDLINEDarlington, Thomas L Kahlbaum, Dennis F Heuss, Jon M Wolff, George T eng 1997/10/01 J Air Waste Manag Assoc. 1997 Oct; 47(10):1070-1078. doi: 10.1080/10473289.1997.10464400"