USA Banner

Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Figure 1 - National Transportation Emissions Trends Index: 1970-1998

Monday, September 10, 2012

Figure 1 - National Transportation Emissions Trends Index: 1970-1998

1970 = 1.0; 1990 = 1.0 for PM-2.5 and ammonia

Excel | CSV

Carbon monoxide (CO)
Figure 1a - National Transportation Emissions Trends Index for Carbon monoxide (CO): 1970-1998. If you are a user with a disability and cannot view this image, please call 800-853-1351 for further assistance.

Volatile organic compounds (VOC)
Figure 1b - National Transportation Emissions Trends Index for Volatile organic compounds (VOC): 1970-1998. If you are a user with a disability and cannot view this image, please call 800-853-1351 for further assistance.

Particulate matter 2.5 microns in diameter or smaller (PM-2.5)
Figure 1c - National Transportation Emissions Trends Index for Particulate matter 2.5 microns in diameter or smaller (PM-2.5): 1970-1998. If you are a user with a disability and cannot view this image, please call 800-853-1351 for further assistance.

Ammonia
Figure 1d - National Transportation Emissions Trends Index for Ammonia: 1970-1998. If you are a user with a disability and cannot view this image, please call 800-853-1351 for further assistance.

Nitrogen oxides (NOx)
Figure 1e - National Transportation Emissions Trends Index for Nitrogen oxides (NOx): 1970-1998. If you are a user with a disability and cannot view this image, please call 800-853-1351 for further assistance.

Particulate matter 10 microns in diameter or smaller (PM-10)
Figure 1f - National Transportation Emissions Trends Index for Particulate matter 10 microns in diameter or smaller (PM-10): 1970-1998. If you are a user with a disability and cannot view this image, please call 800-853-1351 for further assistance.

Lead
Figure 1g - National Transportation Emissions Trends Index for Lead: 1970-1998. If you are a user with a disability and cannot view this image, please call 800-853-1351 for further assistance.

SOURCE: U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, National Air Pollutant Emission Trends: 19001998, EPA 454/R-00-002 (Research Triangle Park, NC:March 2000),also available at http://www.epa.gov/ttn/chief/trends/, as of May 18, 2001.