National air quality and emissions trends report, 1997

The report presents national trends in air quality for carbon monoxide, lead, nitrogen dioxide, ozone, particulate matter, and sulfur dioxide. Trends are presented for the long term (when available), for the 10-year period from 1988 to 1997, and for the short term (changes over the past year). In addition to air quality trends from data collected at monitoring stations across the country, trends in annual nationwide emissions are also presented. While the pollutants named above are emphasized in the report, related topics are also included. These include visibility, acid deposition, air toxics, nonattainment areas, and trends in metropolitan statistical areas. The report also contains a substantial appendix of data tables.