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Air Trends

1999 Air Trends Report - Frequently Requested Tables


Note: EPA no longer updates this information, but it may be useful as a reference or resource.

Please see www.epa.gov/airtrends for the latest information on Air Quality Trends.


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Download all tables: Appendix A (PDF)

Download individual tables (PDF):
Table
Description
2-1 NAAQS in effect as of December 2000
2-2 Milestones in Motor Vehicle Emissions Control
2-3 Summary of Changes in Summer 6-9 a.m.Mean Concentrations of NOx and TNMOC at PAMS Sites
2-4 Biogenic Sources of VOC Emissions By Region
2-5 Percent Contribution to PM2.5 by Component,1999
2-6 Total SO2 Emissions from Phase I and Non-Phase I Acid Rain Sources:1990 –1999 (million tons)
3-1 Summary of MSA Trend Analyses by Pollutant,1990 –1999
3-2 AQI Categories,Colors,and Ranges
4-1 Areas Redesignated Between September 1999 and September 2000
5-1 List of 33 Urban Air Toxics Strategy HAPs
5-2 National Summary of Ambient HAP Concentration Trends in Metropolitan Areas,1994 –1999
5-3 National Summary of Ambient HAP Concentration Trends in Rural Areas,1994 –1999
6-1 Summary of Class I Area Trend1 Analysis
A-1a National Air Quality Trends Statistics for Criteria Pollutants,1980 –1989
A-1b National Air Quality Trends Statistics for Criteria Pollutants,1990 –1999
A-2 National Carbon Monoxide Emissions Estimates,1970,1975,1980,1985,1989 –1999 (thousand short tons)
A-3 National Lead Emissions Estimates,1970,1975,1980,1985,1989 –1999 (short tons)
A-4 National Nitrogen Oxides Emissions Estimates,1970,1975,1980,1985,1989 –1999 (thousand short tons)
A-5 National Volatile Organic Compounds Emissions Estimates,1970,1975,1980,1985,1989 –1999 (thousand short tons)142
A-6 National PM 10 Emissions Estimates,1970,1975,1980,1985,1989 –1999 (thousand short tons)
A-7 Miscellaneous and Natural PM 10 Emissions Estimates,1970,1975,1980,1985,1989 –1999 (thousand short tons)
A-8 National Sulfur Dioxide Emissions Estimates,1970,1975,1980,1985,1989 –1999 (thousand short tons)
A-9 National PM 2.5 Emissions Estimates,1990 –1999 (thousand short tons)
A-10 National Ammonia Emissions Estimates,1990 –1999 (thousand short tons)
A-11 National Long-Term Air Quality Trends,1980 –1999
A-12a National Air Quality Trends by Monitoring Location,1980 –1989
A-12b National Air Quality Trends by Monitoring Location,1990 –1999
A-13a National Air Quality Trends Statistics by EPA Region,1980 –1989
A-13b National Air Quality Trends Statistics by EPA Region,1990 –1999
A-14 Maximum Air Quality Concentrations by County,1999
A-15 Maximum Air Quality Concentrations by Metropolitan Statistical Area,1999
A-16 Metropolitan Statistical Area Air Quality Trends,1990 –1999
A-17 Number of Days with AQI Values Greater Than 100 at Trend Sites,1990 –1999,and All Sites in 1999
A-18 (Ozone only)Number of Days with AQI Values Greater Than 100 at Trend Sites,1990 –1999,and All Sites in 1999
A-19 Condensed Nonattainment Areas List(a)
A-20 Trend in 8-hr ozone concentrations (ppm)exceedances at National Park and National Monument sites,1990 –1999
A-21 Onroad and Nonroad Emissions of 21 Mobile Source Air Toxics,1996
B-1 Number of Ambient Monitors Reporting Data to AIRS

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