Table 4-47: Air Pollution Trends in Selected Metropolitan Statistical Areas

Table 4-47: Air Pollution Trends in Selected Metropolitan Statistical Areas

(Number of days with AQI values greater than 100 at trend sites and all monitoring sites)

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  All sites Trend sites
Total number of sitesR AQI days > 100 (2003) Number of trend sitesR 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003
Akron, OH 2 4 2 8 12 11 6 14 20 4 12 22 4
Albany-Schenectady-Troy, NY 4 5 3 6 3 4 3 3 6 1 11 8 5
Albuquerque, NM 11 3 8 1 0 (R) 1 0 0 (R) 2 0 1 (R) 0 2
Allentown-Bethlehem-Easton, PA 3 4 1 3 7 6 12 18 19 5 9 18 4
Ann Arbor, MI 2 6 1 3 5 5 1 4 1 2 5 11 5
Atlanta, GA 11 13 6 15 36 (R) 30 (R) 35 (R) 59 (R) 66 (R) 30 (R) 14 (R) 30 11
Austin-San Marcos, TX 4 4 1 4 10 0 0 5 8 6 0 5 3
Bakersfield, CA 8 116 8 105 (R) 106 110 58 (R) 76 (R) 93 (R) 82 (R) 85 (R) 91 116
Baltimore, MD 8 10 7 40 36 28 30 51 40 (R) 16 (R) 26 (R) 39 10
Baton Rouge, LA 7 16 7 10 22 12 16 21 26 (R) 30 5 6 16
Birmingham, AL 10 4 6 6 32 15 8 23 (R) 30 (R) 21 (R) 11 (R) 13 3
Boston, MA-NH 6 5 2 6 7 4 7 8 (R) 8 1 12 (R) 13 3
Buffalo-Niagara Falls, NY 2 7 2 4 6 3 1 13 8 5 13 21 7
Charleston-North Charleston, SC 3 0 3 2 1 3 3 3 5 4 0 1 0
Charlotte-Gastonia-Rock Hill, NC-SC 8 9 6 15 18 21 29 50 42 (R) 24 (R) 26 (R) 36 9
Chicago, IL 19 4 20 (R) 7 24 7 10 12 (R) 14 (R) 1 (R) 16 (R) 20 4
Cincinnati, OH-KY-IN 9 11 5 16 (R) 23 (R) 11 (R) 13 (R) 15 (R) 26 (R) 9 (R) 6 (R) 26 7
Cleveland-Lorain-Elyria, OH 9 9 7 (R) 23 (R) 24 (R) 18 (R) 12 (R) 21 (R) 20 (R) 4 (R) 17 (R) 29 6
Columbia, SC 3 2 2 3 2 3 7 16 12 8 7 3 1
Columbus, OH 7 7 3 (R) 11 18 (R) 17 (R) 12 (R) 20 (R) 21 (R) 6 (R) 7 (R) 19 5
Dallas, TX 11 20 3 24 29 10 27 33 25 22 16 15 12
Dayton-Springfield, OH 5 7 4 14 11 18 10 19 (R) 19 (R) 6 (R) 4 28 6
Denver, CO 8 17 8 (R) 2 (R) 3 2 0 9 (R) 3 (R) 2 (R) 2 (R) 7 17
Detroit, MI 7 7 7 11 (R) 12 (R) 12 11 17 (R) 14 (R) 3 (R) 16 (R) 21 7
El Paso, TX 6 1 2 (R) 2 3 (R) 1 (R) 0 6 (R) 0 (R) 3 (R) 1 (R) 4 0
Fort Lauderdale, FL 3 0 2 1 1 1 0 1 (R) 1 (R) 1 (R) 2 (R) 1 0
Fort Wayne, IN 3 4 2 14 12 10 7 8 12 4 2 15 4
Fort Worth-Arlington, TX 8 28 2 31 28 14 14 17 19 16 17 23 22
Fresno, CA 8 97 5 55 61 70 75 67 (R) 81 (R) 78 (R) 92 (R) 91 96
Gary, IN 6 5 3 6 18 12 (R) 11 9 (R) 10 (R) 5 (R) 10 20 3
Grand Rapids-Muskegon-Holland, MI 5 8 4 14 18 9 10 19 (R) 21 (R) 3 (R) 11 (R) 20 7
Greensboro-Winston-Salem-High Pt., NC 7 6 6 7 13 (R) 8 (R) 17 (R) 30 (R) 29 (R) 20 (R) 18 (R) 30 6
Greenville-Spartanburg-Anderson, SC 4 4 4 5 7 7 9 28 19 11 13 28 4
Harrisburg-Lebanon-Carlisle, PA 3 3 3 12 13 3 9 22 (R) 17 (R) 5 (R) 17 (R) 17 3
Hartford, CT 3 7 3 18 (R) 13 5 16 10 18 7 16 21 7
Houston, TX 18 38 9 41 66 (R) 29 (R) 46 (R) 39 (R) 51 (R) 43 (R) 28 23 30
Indianapolis, IN 12 13 7 22 21 16 12 19 24 (R) 4 (R) 8 (R) 23 11
Jacksonville, FL 2 0 1 0 0 0 0 3 2 0 0 (R) 0 0
Jersey City, NJ 1 2 1 12 16 5 9 7 (R) 17 (R) 3 (R) 6 (R) 6 2
Kansas City, MO-KS 8 14 4 10 21 (R) 6 16 14 (R) 3 (R) 10 4 7 10
Knoxville, TN 7 14 7 16 26 21 37 54 (R) 62 (R) 36 (R) 17 45 14
Las Vegas, NV-AZ 15 11 4 3 (R) 0 (R) 4 (R) 0 (R) 3 (R) 0 (R) 0 1 (R) 2 2
Little Rock-North Little Rock, AR 3 1 2 2 7 1 1 (R) 2 5 16 4 9 1
Los Angeles-Long Beach, CA 14 86 14 (R) 117 (R) 97 (R) 74 (R) 45 (R) 46 (R) 19 (R) 45 (R) 37 (R) 35 61
Louisville, KY-IN 7 7 7 28 26 17 18 29 (R) 44 (R) 10 (R) 10 (R) 26 7
McAllen-Edinburg-Mission, TX 2 1 2 0 0 0 0 0 0 0 1 1 1
Memphis, TN-AR-MS 4 9 4 10 21 (R) 18 17 27 35 24 13 16 9
Miami, FL 4 1 4 1 2 1 3 8 (R) 5 (R) 0 1 0 1
Middlesex-Somerset-Hunterdon, NJ 2 7 2 9 20 15 19 22 26 11 21 29 7
Milwaukee-Waukesha, WI 10 8 8 12 14 5 5 12 (R) 17 (R) 4 (R) 12 12 8
Minneapolis-St. Paul, MN-WI 7 1 4 (R) 0 (R) 3 0 0 1 (R) 0 (R) 0 2 1 1
Mobile, AL 3 3 1 0 1 3 3 8 4 6 1 0 1
Monmouth-Ocean, NJ 2 12 2 13 20 17 21 31 27 11 21 31 12
Nashville, TN 7 6 6 21 26 (R) 22 20 30 (R) 33 (R) 16 7 16 6
Nassau-Suffolk, NY 3 6 2 15 10 8 12 11 18 5 3 13 6
New Haven-Meriden, CT 2 11 1 13 14 8 19 9 (R) 16 (R) 6 (R) 11 (R) 20 9
New Orleans, LA 6 8 6 8 20 8 7 7 18 17 5 2 8
New York, NY 7 7 4 16 (R) 20 14 23 18 25 (R) 11 (R) 16 (R) 30 7
Newark, NJ 2 4 1 (R) 11 20 11 13 22 (R) 21 (R) 6 (R) 13 (R) 27 4
Norfolk-VA Beach-Newport News, VA-NC 3 4 3 6 6 4 17 15 (R) 16 5 (R) 6 15 4
Oakland, CA 11 4 7 (R) 2 (R) 8 (R) 5 0 (R) 8 (R) 7 (R) 1 (R) 3 (R) 5 2
Oklahoma City, OK 6 2 3 5 13 2 4 7 4 6 2 2 2
Omaha, NE-IA 3 0 3 (R) 0 (R) 0 (R) 0 (R) 0 (R) 0 (R) 2 (R) 0 (R) 0 0 0
Orange County, CA 4 10 2 (R) 14 (R) 8 (R) 6 3 (R) 5 (R) 1 (R) 3 (R) 2 (R) 0 3
Orlando, FL 5 1 4 3 1 1 5 14 4 3 (R) 3 1 0
Philadelphia, PA-NJ 12 14 10 (R) 25 (R) 30 (R) 22 (R) 32 37 32 (R) 17 (R) 27 33 13
Phoenix-Mesa, AZ 26 12 7 (R) 7 (R) 19 15 (R) 10 14 10 (R) 9 (R) 6 (R) 6 7
Pittsburgh, PA 12 8 11 (R) 20 (R) 25 12 (R) 20 39 (R) 23 (R) 4 (R) 19 (R) 28 7
Portland-Vancouver, OR-WA 5 0 3 (R) 1 2 6 0 3 (R) 0 (R) 0 (R) 0 (R) 1 0
Providence-Fall River-Warwick, RI-MA 2 10 1 5 7 2 3 2 (R) 2 (R) 2 10 9 4
Raleigh-Durham-Chapel Hill, NC 8 8 8 (R) 16 (R) 16 (R) 18 (R) 29 (R) 52 (R) 32 (R) 18 (R) 9 29 8
Richmond-Petersburg, VA 4 5 3 9 14 5 19 22 21 (R) 5 (R) 12 (R) 21 3
Riverside-San Bernardino, CA 19 103 15 (R) 149 (R) 119 (R) 115 (R) 104 (R) 95 (R) 96 (R) 98 (R) 92 (R) 96 102
Rochester, NY 2 3 2 1 6 0 6 4 9 1 5 13 3
Sacramento, CA 16 43 11 37 41 44 (R) 18 (R) 32 (R) 40 (R) 31 (R) 35 (R) 39 36
St. Louis, MO-IL 17 11 14 (R) 31 (R) 36 23 (R) 14 24 (R) 29 (R) 16 (R) 14 (R) 32 11
Salt Lake City-Ogden, UT 9 6 6 (R) 9 5 (R) 12 2 19 (R) 4 (R) 7 (R) 4 (R) 7 3
San Antonio, TX 3 7 1 3 17 2 3 6 9 0 0 17 4
San Diego, CA 9 6 9 46 48 31 14 33 (R) 16 (R) 14 (R) 17 (R) 13 6
San Francisco, CA 3 0 3 0 2 0 0 0 (R) 0 (R) 0 (R) 0 (R) 0 0
San Jose, CA 6 6 5 2 14 8 0 8 (R) 3 (R) 1 (R) 3 (R) 6 6
Sarasota-Bradenton, FL 6 3 2 2 1 1 2 9 4 5 4 0 2
Scranton-Wilkes Barre-Hazleton, PA 4 3 4 7 12 4 11 7 12 (R) 1 (R) 10 (R) 16 3
Seattle-Bellevue-Everett, WA 4 2 1 (R) 1 (R) 0 (R) 0 (R) 0 3 (R) 0 (R) 0 (R) 0 (R) 0 0
Springfield, MA 3 3 4 12 9 (R) 4 10 7 (R) 10 (R) 2 13 12 3
Stockton-Lodi, CA 2 2 3 6 9 14 3 7 10 3 2 3 2
Syracuse, NY 3 5 2 1 5 0 2 3 4 1 4 9 2
Tacoma, WA 3 1 2 2 0 1 0 4 (R) 0 (R) 0 (R) 0 0 0
Tampa-St. Petersburg-Clearwater, FL 10 6 7 3 2 3 4 11 (R) 9 (R) 6 4 0 4
Toledo, OH 5 6 2 8 9 11 4 5 4 2 9 13 6
Tucson, AZ 9 1 5 0 3 0 1 0 (R) 1 0 0 (R) 1 1
Tulsa, OK 6 9 2 (R) 11 (R) 19 (R) 12 (R) 5 (R) 7 (R) 13 10 (R) 4 5 7
Vallejo-Fairfield-Napa, CA 3 0 4 0 5 4 0 8 8 0 0 0 0
Ventura, CA 6 31 6 63 66 (R) 65 (R) 46 (R) 30 (R) 23 (R) 30 (R) 23 (R) 15 31
Washington, DC-MD-VA-WV 20 8 15 22 32 18 30 47 39 11 22 34 8
West Palm Beach-Boca Raton, FL 2 0 1 0 0 0 0 2 1 0 1 0 0
Wichita, KS 2 1 2 0 1 2 3 3 2 1 3 2 1
Wilmington-Newark, DE-MD 5 7 4 24 27 13 22 28 21 18 19 21 7
Worchester, MA 1 1 1 11 7 0 5 6 8 1 6 8 1
Youngstown-Warren, OH 3 5 2 5 11 8 10 20 (R) 12 (R) 2 (R) 12 (R) 16 4

KEY: AQI = Air Quality Index; R = revised.

NOTES

The Air Quality Index (AQI) integrates information on 5 major pollutants (particulate matter less than 10 microns in diameter, sulfur dioxide, carbon monoxide, ozone, and nitrogen dioxide and for 2000-2003 particulate matter less than 2.5 microns in diameter is also included as a sixth major pollutant) across an entire monitoring network into a single number that represents the worst daily air quality experienced in an urban area. An AQI greater than 100 indicates that at least 1 criteria pollutant exceeded air quality standards on a given day; therefore, air quality would be in the unhealthful range on that day. Air quality monitoring sites are selected as "trend sites" if they have complete data for at least 8 of the 10 last years.

SOURCE

U.S. Environmental Protection Agency, Office of Air and Radiation, Air Trends, Factbook and Related Information, available at http://www.epa.gov/airtrends/aqi10year.pdf as of Aug. 25, 2004.