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.
You will need Adobe Acrobat Reader to view the Adobe PDF files on this page. See EPA's PDF page for more information about getting and using the free Acrobat Reader.
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 |