Air Trends
Reports and Data
Trends Reports are EPA's "report card" on the status of air quality and air pollutant emissions.
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2011 2010 2008 2007
- Latest Findings on National Air Quality - Status and Trends through 2006
- NOx Budget Program 2006 Progress Report
- NOx Budget Trading Program: 2005 Program Compliance and Environmental Results
- Air Emissions Summary Through 2005
- Air Quality Summary Through 2005
- The Particle Pollution Report: Current Understanding of Air Quality and Emissions through 2003
- The Ozone Report: Measuring Progress through 2003
- Latest Findings on National Air Quality: 2001 Status and Trends (PDF) (32pp, 8.0 MB)
- Maximum Air Quality Concentrations by Metropolitan Statistical Area (PDF) (6pp, 392k)
- Metropolitan Statistical Area Trends, 1992 - 2001 (PDF) (25pp, 1.5 MB)
- Number of Days With AQI Values Greater Than 100 at Trends Sites, 1992 - 2001 and All Sites 2001 (PDF) (2pp, 180k)
- Number of Days With AQI Values Greater Than 100 at Trends Sites, Ozone Only, 1992 - 2001 and All Sites 2001 (PDF) (2pp, 180k)
- Condensed Nonattainment Area List (PDF) (3pp, 96k)
- Latest Findings on National Air Quality: 2000 Status and Trends (PDF) (28pp, 2.7 MB)
- Air Quality Statistics by City (PDF) (6pp, 700k)
- Air Quality Statistics by County (PDF) (21pp, 2.4 MB)
- Number of Days with an Air Quality Index over 100 by City (PDF) (2pp, 20k)
- Number of Days with an Air Quality Index over 100 by City, Ozone Only (PDF) (2pp, 15k)
- Ozone Air Quality at National Parks (PDF) (1pg, 9k)
- Carbon Monoxide (1999-2000) and Ozone (1998-2000) Air Quality Update (PDF) (22pp, 70k)
- National Air Quality and Emissions Trends Report, 1999
- Latest Findings on National Air Quality: 1999 Status and Trends (PDF) (28pp, 2.8 MB)
- Carbon Monoxide (1998-1999) and Ozone (1997-1999) Air Quality Update (PDF) (21pp, 231k)
- National Air Quality and Emissions Trends Report, 1998
- National Air Pollutant Emission Trends, 1900-1998
- Carbon Monoxide (1997-1998) and Ozone (1996-1998) Air Quality Update (PDF) (14pp, 193k)
- National Air Quality and Emissions Trends Report, 1997
- Latest Findings on National Air Quality: 1997 Status and Trends (PDF) (25pp, 493k)
- National Air Quality and Emissions Trends Report, 1996
- Brochure on National Air Quality: Status and Trends
- Air Quality Trends 1994 (PDF) (39pp, 571k)
- Previous Reports
- National Emission Inventory (NEI) website
- AirNow - Real-time air quality maps and forecasts
- AirData - On-line air quality data
- AirExplorer - A collection of user-friendly visualization tools for air quality analysts
- AirCompare - Provides local air quality information to help you make informed, health-protective decisions about moving or vacationing
- CASTNET - Data on dry acidic deposition and rural, ground-level ozone
- NADP
- The National Atmospheric Deposition Program - VIEWS - The Visibility Information Exchange Web System