||National air quality and emissions trends report, 1991.
Curran, T. ;
Faoro, R. ;
Fitz-Simons, T. ;
Freas, W. ;
||Environmental Protection Agency, Research Triangle Park, NC. Office of Air Quality Planning and Standards.
|| U.S. Environmental Protection Agency, Office of Air and Radiation, Office of Air Quality Planning and Standards,
Air--Pollution--United States--Statistics. ;
Air quality ;
Air pollution standards ;
Emission factors ;
Study estimates ;
Statistical analysis ;
Carbon monoxide ;
Nitrogen dioxide ;
Sulfur dioxide ;
Metropolitan areas ;
Regional analysis ;
Emission inventories ;
National Ambient Air Quality Standards ;
National Air Monitoring Sites(NAMS)
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||130 pages : illustrations, charts, maps ; 28 cm
The report presents national and regional trends in air quality from 1982 through 1991 for particulate matter, sulfur dioxide, carbon monoxide, nitrogen dioxide, ozone and lead. Air quality trends are also presented for 15 metropolitan areas. Both national and regional trends in each of these pollutants are examined. National air quality trends are also presented for both the National Air Monitoring Sites (NAMS) and other site categories. In addition to ambient air quality, trends are also presented for annual nationwide emissions. These emissions are estimated using the best available engineering calculations; the ambient levels presented are averages of direct measurements. International comparisons of air quality and emissions are also contained in this report. This report also includes a section, Air Quality Levels in Metropolitan Statistical Areas (MSAs). Its purpose is to provide interested members of the air pollution control community, the private sector and the general public with greatly simplified air pollution information. Air quality statistics are presented for each of the pollutants for all MSAs with data in 1991.
"Technical Support Division." "October 1992." "Nineteenth annual report of air pollution trends."--Page iii. Includes bibliographical references. Microfiche.