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)
(R) Metropolitan Statistical Area | All sites | (R)Number of trend sites | Trend sites | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Total number of sites in 2008 | Number of days with AQI > 100 (2008) | |||||||||||||||||
1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | ||||
Akron, OH | 18 | 8 | 7 | 23 | 21 | 26 | 16 | 37 | 40 | 14 | 28 | 38 | 15 | 10 | 30 | 5 | 22 | 8 |
Albany-Schenectady-Troy, NY | 26 | 8 | 5 | 13 | 12 | 9 | 8 | 9 | 15 | 3 | 18 | 17 | 9 | 5 | 8 | 2 | 13 | 7 |
Albuquerque, NM | 75 | 24 | 17 | 5 | 3 | 5 | 2 | 3 | 5 | 7 | 1 | 11 | 15 | 5 | 9 | 3 | 1 | 0 |
Allentown-Bethlehem-Easton, PA-NJ | 24 | 9 | 5 | 10 | 18 | 19 | 22 | 39 | 31 | 16 | 34 | 38 | 13 | 12 | 16 | 10 | 12 | 9 |
Atlanta-Sandy Springs-Marietta, GA | 62 | 31 | 18 | 27 | (R) 54 | (R) 44 | (R) 50 | (R) 78 | (R) 88 | (R) 66 | (R) 39 | (R) 41 | (R) 23 | (R) 21 | (R) 30 | (R) 40 | (R) 37 | 24 |
Austin-Round Rock, TX | 25 | 2 | 1 | 8 | 28 | 5 | 2 | 9 | 14 | 14 | 5 | 8 | 9 | 8 | 9 | 13 | 4 | 2 |
Bakersfield, CA | 54 | 152 | 15 | 129 | 133 | 127 | 94 | 104 | 161 | 164 | 158 | 186 | 169 | 160 | 122 | 137 | 131 | 147 |
Baltimore-Towson, MD | 74 | 23 | 17 | 61 | 57 | 43 | 46 | 70 | 54 | 39 | 50 | 59 | 31 | 31 | 36 | 34 | 45 | 23 |
Baton Rouge, LA | 53 | 16 | 20 | (R) 25 | (R) 36 | (R) 20 | (R) 39 | (R) 32 | (R) 43 | (R) 51 | (R) 20 | (R) 18 | (R) 24 | (R) 22 | (R) 44 | (R) 28 | (R) 24 | 8 |
Birmingham-Hoover, AL | 60 | 14 | 21 | 11 | 50 | 25 | 29 | 38 | 65 | 68 | 41 | 28 | 17 | 17 | 35 | 33 | 41 | 11 |
Boston-Cambridge-Quincy, MA-NH | 123 | 8 | 16 | 0 | (R) 1 | (R) 1 | 0 | 0 | (R) 6 | 0 | 3 | (R) 11 | 8 | 1 | 4 | 1 | 3 | 0 |
Bradenton-Sarasota-Venice, FL | 27 | 5 | 8 | 7 | 6 | 3 | 14 | 15 | 11 | 16 | 14 | 3 | 10 | 18 | 11 | 5 | 4 | 5 |
Bridgeport-Stamford-Norwalk, CT | 38 | 19 | 11 | 28 | 28 | 22 | 31 | 35 | 29 | 22 | 33 | 41 | 19 | 11 | 25 | 21 | 27 | 19 |
Buffalo-Niagara Falls, NY | 41 | 4 | 10 | 13 | 12 | 6 | 5 | 26 | 22 | 7 | 24 | 29 | 13 | 8 | 23 | (R) 6 | 18 | 4 |
Charleston-North Charleston, SC | 23 | 1 | 9 | 3 | 1 | 5 | 5 | 12 | 13 | 9 | 0 | 4 | 3 | 3 | 8 | 7 | 5 | 1 |
Charlotte-Gastonia-Concord, NC-SC | 52 | 24 | 8 | 15 | 32 | 40 | 41 | 67 | 62 | (R) 38 | (R) 31 | (R) 41 | 12 | (R) 16 | (R) 25 | 21 | 33 | 16 |
Chicago-Naperville-Joliet, IL-IN-WI | 230 | 3 | 61 | (R) 24 | (R) 42 | (R) 25 | (R) 23 | (R) 36 | (R) 46 | (R) 31 | (R) 66 | (R) 39 | (R) 28 | (R) 20 | (R) 36 | (R) 11 | (R) 27 | 2 |
Cincinnati-Middletown, OH-KY-IN | 106 | 16 | 23 | (R) 35 | (R) 39 | (R) 35 | (R) 24 | (R) 43 | (R) 50 | (R) 26 | (R) 34 | (R) 44 | (R) 26 | (R) 12 | (R) 38 | (R) 18 | (R) 42 | 14 |
Cleveland-Elyria-Mentor, OH | 82 | 13 | 24 | 32 | (R) 28 | (R) 28 | (R) 21 | (R) 32 | (R) 47 | (R) 25 | (R) 33 | (R) 34 | (R) 19 | (R) 20 | (R) 33 | (R) 16 | (R) 10 | 12 |
Colorado Springs, CO | 61 | 2 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Columbia, SC | 41 | 8 | 10 | 7 | 10 | 4 | 14 | 32 | 29 | 25 | 16 | 14 | 3 | 9 | 11 | 10 | 7 | 7 |
Columbus, OH | 31 | 10 | 7 | 23 | 27 | 26 | 17 | 40 | 37 | 16 | 20 | 38 | 12 | 3 | 20 | 5 | 13 | 4 |
Dallas-Fort Worth-Arlington, TX | 130 | 32 | 13 | (R) 56 | (R) 60 | (R) 35 | (R) 47 | (R) 58 | (R) 41 | (R) 54 | (R) 43 | (R) 40 | (R) 40 | (R) 32 | (R) 56 | (R) 39 | (R) 16 | 20 |
Dayton, OH | 23 | 9 | 5 | (R) 12 | (R) 10 | (R) 17 | (R) 11 | (R) 9 | (R) 18 | (R) 6 | (R) 13 | (R) 20 | (R) 6 | (R) 0 | (R) 12 | (R) 1 | (R) 3 | 0 |
Denver-Aurora, CO | 85 | 13 | 22 | 13 | 11 | 12 | 7 | 18 | 9 | 15 | 17 | 26 | 32 | 2 | 11 | 27 | 21 | 10 |
Detroit-Warren-Livonia, MI | 73 | 7 | 31 | 21 | 20 | 26 | 18 | 33 | 41 | 17 | 41 | (R) 33 | 25 | 11 | (R) 37 | 12 | 21 | 7 |
El Paso, TX | 60 | 17 | 12 | 8 | 6 | 10 | 5 | 12 | 7 | 15 | 13 | 10 | 10 | 3 | 8 | 8 | 6 | 5 |
Fresno, CA | 39 | 92 | 20 | 90 | 91 | 105 | 118 | 86 | 164 | 164 | 186 | 204 | 167 | 84 | 95 | 97 | 93 | 89 |
Grand Rapids-Wyoming, MI | 13 | 1 | 6 | (R) 14 | (R) 15 | (R) 11 | (R) 9 | (R) 4 | (R) 10 | (R) 6 | (R) 15 | (R) 17 | (R) 10 | (R) 3 | (R) 16 | (R) 7 | (R) 8 | 1 |
Greenville-Mauldin-Easley, SC | 22 | 7 | 5 | (R) 3 | (R) 15 | (R) 17 | (R) 13 | (R) 17 | (R) 36 | (R) 20 | (R) 23 | (R) 28 | (R) 7 | (R) 2 | (R) 11 | (R) 10 | (R) 8 | 6 |
Harrisburg-Carlisle, PA | 16 | 12 | 8 | 28 | 28 | 17 | 21 | 37 | 31 | 17 | 42 | 35 | 13 | 8 | 19 | 13 | 19 | 11 |
Hartford-West Hartford-East Hartford, CT | 35 | 10 | 7 | (R) 25 | (R) 28 | (R) 14 | (R) 19 | (R) 26 | (R) 26 | 14 | (R) 27 | (R) 34 | 13 | (R) 11 | 19 | (R) 15 | (R) 24 | 10 |
Honolulu, HI | 31 | 0 | 11 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 0 | 0 |
Houston-Sugar Land-Baytown, TX | 126 | 29 | 23 | 55 | 82 | 38 | 58 | 61 | 64 | 57 | 42 | 40 | 47 | 37 | 49 | 31 | 25 | 17 |
Indianapolis-Carmel, IN | 83 | 5 | 25 | 45 | 39 | 32 | 27 | 36 | 43 | 17 | 27 | 38 | 17 | 4 | 34 | 14 | 24 | 3 |
Jacksonville, FL | 28 | 0 | 14 | 1 | 1 | 2 | 1 | 14 | 6 | 3 | 5 | 1 | 0 | 4 | 6 | 7 | 8 | 0 |
Kansas City, MO-KS | 85 | 3 | 13 | (R) 19 | (R) 32 | (R) 13 | (R) 20 | (R) 23 | (R) 13 | (R) 19 | (R) 9 | (R) 22 | (R) 20 | 1 | (R) 18 | 24 | 10 | 0 |
Knoxville, TN | 51 | 18 | 18 | (R) 34 | (R) 51 | (R) 49 | (R) 60 | (R) 88 | (R) 92 | (R) 58 | (R) 39 | (R) 63 | 31 | 14 | 39 | (R) 27 | (R) 50 | 18 |
Las Vegas-Paradise, NV | 94 | 12 | 6 | 22 | 6 | 21 | 9 | 9 | 8 | 6 | 2 | 13 | 10 | 4 | 9 | 12 | 7 | 0 |
Little Rock-North Little Rock-Conway, AR | 28 | 2 | 6 | 8 | 24 | 9 | 10 | 13 | 16 | 29 | 17 | 18 | 3 | 0 | 19 | 11 | 11 | 2 |
Los Angeles-Long Beach-Santa Ana, CA | 157 | 80 | 51 | 145 | (R) 123 | 97 | 65 | (R) 63 | 71 | (R) 85 | 105 | (R) 95 | (R) 107 | 99 | 60 | 56 | 59 | 53 |
Louisville/Jefferson County, KY-IN | 56 | 9 | 17 | 47 | 41 | 28 | 32 | 48 | 78 | 29 | 36 | 50 | 21 | 9 | 39 | 15 | 30 | 8 |
Madison, WI | 17 | 1 | 3 | 1 | 15 | 7 | 5 | 8 | 12 | 3 | 7 | 10 | 8 | 1 | 9 | 1 | 10 | 1 |
McAllen-Edinburg-Mission, TX | 8 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 |
Memphis, TN-MS-AR | 49 | 10 | 12 | 37 | 56 | 39 | 35 | 55 | 56 | 52 | 33 | 34 | 29 | 11 | 37 | 30 | 35 | 10 |
Miami-Fort Lauderdale-Pompano Beach, FL | 83 | 5 | 26 | (R) 6 | (R) 10 | (R) 4 | (R) 6 | (R) 11 | (R) 12 | (R) 10 | (R) 5 | (R) 3 | (R) 2 | (R) 3 | (R) 1 | (R) 6 | (R) 9 | 5 |
Milwaukee-Waukesha-West Allis, WI | 55 | 3 | 12 | 17 | 23 | 15 | 6 | 16 | (R) 25 | (R) 8 | 25 | (R) 21 | 17 | 6 | (R) 21 | 6 | 11 | 3 |
Minneapolis-St. Paul-Bloomington, MN-WI | 131 | 2 | 20 | 4 | 9 | 0 | 4 | 4 | 4 | 8 | 10 | 4 | 5 | 0 | 7 | 1 | 5 | 1 |
Nashville-Davidson-Murfreesboro-Franklin, TN | 51 | 11 | 18 | 31 | 46 | 46 | 44 | 45 | 66 | (R) 48 | 23 | 33 | 20 | 7 | 26 | 17 | (R) 33 | 9 |
New Haven-Milford, CT | 50 | 11 | 7 | (R) 19 | (R) 23 | (R) 15 | (R) 25 | (R) 15 | (R) 22 | (R) 18 | (R) 22 | (R) 32 | (R) 17 | (R) 6 | (R) 19 | (R) 8 | (R) 13 | 9 |
New Orleans-Metairie-Kenner, LA | 61 | 5 | 7 | (R) 12 | (R) 33 | (R) 11 | (R) 15 | (R) 17 | (R) 35 | (R) 29 | (R) 18 | (R) 4 | (R) 15 | (R) 12 | (R) 13 | (R) 13 | (R) 17 | 2 |
New York-Northern New Jersey-Long Island, NY-NJ-PA | 254 | 35 | 57 | (R) 56 | (R) 44 | (R) 43 | (R) 42 | (R) 57 | (R) 53 | (R) 35 | (R) 54 | (R) 61 | (R) 33 | (R) 32 | (R) 41 | (R) 38 | (R) 38 | 29 |
Oklahoma City, OK | 34 | 5 | 9 | 21 | 29 | 10 | 15 | 35 | 17 | 16 | 24 | 10 | 13 | 6 | 12 | 31 | 4 | 4 |
Omaha-Council Bluffs, NE-IA | 40 | 3 | 12 | 1 | (R) 3 | 0 | 1 | (R) 3 | (R) 5 | 3 | 2 | 0 | 1 | 1 | 1 | 0 | 1 | 0 |
Orlando-Kissimmee, FL | 25 | 2 | 13 | 7 | 9 | 6 | 6 | 23 | 13 | 14 | 12 | 5 | 4 | 5 | 8 | 8 | 8 | 1 |
Oxnard-Thousand Oaks-Ventura, CA | 38 | 31 | 14 | 97 | 100 | 95 | 75 | 54 | 54 | 57 | 52 | 26 | 47 | 41 | 36 | 31 | 22 | 30 |
Philadelphia-Camden-Wilmington, PA-NJ-DE-MD | 141 | 30 | 48 | (R) 56 | (R) 62 | (R) 43 | (R) 42 | (R) 63 | (R) 55 | (R) 39 | (R) 57 | (R) 60 | (R) 37 | (R) 23 | (R) 36 | (R) 30 | (R) 42 | 28 |
Phoenix-Mesa-Scottsdale, AZ | 160 | 188 | 23 | 33 | (R) 39 | (R) 45 | (R) 32 | (R) 47 | (R) 47 | (R) 34 | 25 | 22 | 26 | 9 | 23 | 25 | 11 | 11 |
Pittsburgh, PA | 125 | 39 | 41 | (R) 37 | (R) 38 | (R) 31 | (R) 40 | (R) 59 | 50 | 40 | 56 | (R) 62 | 42 | 40 | 54 | 41 | 44 | 22 |
Portland-Vancouver-Beaverton, OR-WA | 68 | 7 | 10 | 5 | 4 | 12 | 0 | 9 | 6 | 5 | 4 | 7 | 2 | 4 | 4 | 2 | 5 | 3 |
Poughkeepsie-Newburgh-Middletown, NY | 8 | 8 | 2 | 12 | 14 | 14 | 10 | 16 | 18 | 7 | 17 | 16 | 5 | 4 | 6 | 1 | 11 | 5 |
Providence-New Bedford-Fall River, RI-MA | 61 | 6 | 8 | (R) 21 | (R) 20 | (R) 16 | (R) 20 | (R) 16 | (R) 18 | (R) 17 | (R) 27 | (R) 33 | (R) 17 | (R) 9 | (R) 19 | (R) 12 | (R) 12 | 4 |
Raleigh-Cary, NC | 37 | 11 | 2 | 11 | 10 | 13 | 29 | 46 | 43 | (R) 15 | 11 | 39 | 8 | 3 | 12 | 7 | 17 | 5 |
Richmond, VA | 35 | 17 | 9 | 26 | 28 | 23 | 40 | 50 | 39 | 17 | 24 | 40 | 14 | 5 | 23 | 14 | 19 | 15 |
Riverside-San Bernardino-Ontario, CA | 146 | 128 | 43 | 167 | 154 | 147 | 131 | 117 | 151 | 171 | 183 | 175 | 158 | 147 | 141 | 128 | 135 | 119 |
Rochester, NY | 17 | 4 | 1 | 8 | 10 | 1 | 10 | 11 | 17 | 2 | 14 | 16 | 5 | 0 | 0 | (R) 1 | (R) 5 | 2 |
Sacramento--Arden-Arcade--Roseville, CA | 111 | 62 | 22 | 69 | 61 | 70 | 39 | 55 | (R) 94 | 65 | 72 | 90 | 66 | 55 | 58 | 74 | 32 | 44 |
St. Louis, MO-IL | 158 | 9 | 35 | 49 | (R) 47 | 35 | 32 | (R) 46 | 45 | 30 | (R) 35 | (R) 48 | 29 | (R) 12 | (R) 45 | 22 | 34 | 6 |
Salt Lake City, UT | 49 | 17 | 11 | 27 | 8 | 14 | 3 | 20 | 18 | 23 | 29 | 34 | 20 | 38 | 32 | (R) 20 | 28 | 15 |
San Antonio, TX | 41 | 10 | 2 | 7 | 32 | 7 | 10 | 12 | 20 | 5 | 4 | 26 | 18 | 6 | 10 | 8 | 3 | 7 |
San Diego-Carlsbad-San Marcos, CA | 64 | 37 | 24 | 90 | 94 | (R) 60 | 39 | 51 | 49 | 58 | 53 | 35 | 40 | 27 | 26 | 39 | 33 | 35 |
San Francisco-Oakland-Fremont, CA | 116 | 12 | 28 | (R) 5 | (R) 13 | (R) 9 | (R) 2 | (R) 11 | (R) 23 | (R) 14 | (R) 20 | (R) 28 | (R) 14 | (R) 10 | (R) 6 | (R) 13 | (R) 5 | 7 |
San Jose-Sunnyvale-Santa Clara, CA | 38 | 15 | 6 | (R) 13 | (R) 21 | (R) 37 | (R) 7 | (R) 21 | (R) 14 | (R) 9 | (R) 9 | (R) 24 | (R) 14 | (R) 7 | (R) 4 | (R) 13 | (R) 3 | 13 |
San Juan-Caguas-Guaynabo, PR | 51 | 1 | 5 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
Scranton--Wilkes-Barre, PA | 19 | 5 | 10 | 19 | 25 | 14 | 19 | 26 | 25 | (R) 7 | (R) 23 | 30 | (R) 6 | 4 | 12 | 3 | 7 | 5 |
Seattle-Tacoma-Bellevue, WA | 120 | 7 | 14 | (R) 3 | (R) 3 | (R) 5 | (R) 0 | (R) 6 | (R) 7 | (R) 18 | (R) 14 | (R) 13 | (R) 10 | (R) 4 | (R) 6 | (R) 10 | (R) 9 | 7 |
Springfield, MA | 42 | 11 | 10 | 28 | 17 | 8 | 22 | 24 | 18 | 7 | 28 | 24 | 13 | 9 | 16 | 12 | 21 | 10 |
Stockton, CA | 16 | 21 | 5 | 6 | 11 | 7 | 2 | 19 | 22 | 14 | 11 | 13 | 6 | 3 | 5 | 16 | 11 | 10 |
Syracuse, NY | 19 | 3 | 5 | 8 | 10 | 3 | 6 | 10 | 12 | 2 | 13 | 19 | 4 | 0 | 8 | 3 | 8 | 3 |
Tampa-St. Petersburg-Clearwater, FL | 73 | 7 | 24 | 10 | 14 | 8 | 24 | 20 | 23 | 29 | 18 | 5 | 13 | 11 | 15 | 9 | 12 | 7 |
Toledo, OH | 20 | 4 | 6 | 12 | 15 | 20 | 8 | 15 | 18 | 9 | 24 | 23 | 15 | 9 | 25 | 4 | 5 | 1 |
Tucson, AZ | 51 | 3 | 20 | 10 | 14 | 8 | 8 | 7 | 8 | 5 | 0 | 7 | 7 | 0 | 8 | 9 | 1 | 2 |
Tulsa, OK | 35 | 9 | 8 | 26 | 39 | 23 | 12 | 24 | 24 | 21 | 21 | 22 | 16 | 1 | 19 | 24 | 2 | 7 |
Virginia Beach-Norfolk-Newport News, VA-NC | 29 | 15 | 7 | 19 | 22 | 12 | 37 | 34 | 32 | 23 | 14 | 31 | 10 | 5 | 12 | 11 | 9 | 15 |
Washington-Arlington-Alexandria, DC-VA-MD-WV | 120 | 22 | 37 | 43 | 54 | 39 | 51 | 65 | 61 | (R) 34 | 41 | 54 | 21 | 21 | 36 | 31 | 38 | 16 |
Wichita, KS | 21 | 1 | 8 | 1 | 7 | 3 | 8 | 12 | 9 | 9 | 20 | 10 | 7 | 1 | 4 | 2 | 0 | 1 |
Worcester, MA | 21 | 8 | 2 | 20 | 15 | 2 | 8 | 14 | 14 | 4 | 9 | 15 | 9 | 3 | 8 | 5 | 20 | 8 |
Youngstown-Warren-Boardman, OH-PA | 23 | 11 | 11 | (R) 23 | (R) 18 | (R) 20 | (R) 17 | (R) 45 | (R) 24 | (R) 12 | (R) 43 | (R) 33 | (R) 13 | (R) 5 | (R) 25 | (R) 8 | (R) 17 | 8 |
KEY: AQI = Air Quality Index; R = revised.
NOTES
The Air Quality Index (AQI) integrates information on 6 major pollutants (particulate matter less than 10 microns in diameter, particulate matter less than 2.5 microns in diameter, sulfur dioxide, carbon monoxide, ozone, and nitrogen dioxide) 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.
The major reason for revisions to the historical data for the AQI is that changes in the National Ambient Air Quality Standards (NAAQS) are retroactively applied to the data for previous years to provide consistent comparisons over time. In addition, data from monitoring stations that have fallen below/surpassed the criterion to qualify as a 'trend site' is excluded/included in the latest calculation of the index. Thus, this edition of this table is not comparable to previous editions.
Data for 1999 to 2008 include particulate matter 2.5 micron in diameter (PM 2.5).
Particulate matter is the term for solid or liquid particles found in the air.
SOURCE
U.S. Environmental Protection Agency, Office of Air and Radiation, Air Trends, Air Quality Index Information, available at http://www.epa.gov/air/airtrends/aqi_info.html as of Jan. 20, 2010.