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)

Excel | CSV

  All sites Trend sites
Total number of sites AQI days > 100 (1999) Number of trend sites 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999
Akron, OH 6 R20 5 9 30 8 10 8 12 11 6 14 20
Albany-Schenectady-Troy, NY R10 R6 R10 4 9 5 5 6 3 4 3 2 6
Albuquerque, NM R21 R2 21 8 5 0 0 1 0 0 0 0 1
Allentown-Bethlehem-Easton, PA 9 R23 R5 10 14 3 6 R3 R9 6 13 18 20
Atlanta, GA 18 R69 R10 42 23 R20 R36 R15 R35 R25 R31 R50 61
Austin-San Marcos, TX R3 R19 R1 4 3 1 2 4 R10 0 0 5 8
Bakersfield, CA R14 R94 R8 R99 R113 100 97 98 R105 109 55 R76 88
Baltimore, MD R20 R40 R17 29 50 23 48 41 36 28 30 51 40
Baton Rouge, LA 10 R26 R7 28 11 5 R6 7 15 7 8 14 17
Bergen-Passaic, NJ R7 0 R7 8 11 2 3 5 11 3 5 0 0
Birmingham, AL R14 R27 R14 28 5 12 10 6 32 15 8 23 27
Boston, MA-NH R24 9 R24 7 13 9 6 10 8 2 8 7 5
Buffalo-Niagara Falls, NY R20 R8 R20 R7 9 3 1 4 6 3 1 13 8
Charleston-North Charleston, SC 9 R5 9 1 2 0 2 2 1 3 3 3 5
Charlotte-Gastonia-Rock Hill, NC-SC R24 R42 R12 31 12 11 23 9 13 18 26 48 34
Chicago, IL R51 R12 R45 4 22 4 3 8 21 6 9 7 12
Cincinnati, OH-KY-IN 23 R27 R19 R12 R19 R1 R6 R16 R19 R10 11 14 12
Cleveland-Lorain-Elyria, OH 40 R23 R27 10 23 11 13 23 24 R18 R11 20 18
Columbus, OH 12 R25 R9 4 17 5 7 10 15 16 8 19 20
Dallas, TX R9 R35 R9 24 2 R12 R14 R27 36 12 R20 R28 23
Dayton-Springfield, OH 13 R20 10 13 12 2 11 14 11 18 9 19 19
Denver, CO R28 R5 R22 9 6 R11 3 1 2 0 0 5 1
Detroit, MI R29 R15 R29 11 28 8 5 R11 14 13 12 17 15
El Paso, TX R24 R7 R19 19 7 10 7 11 R8 7 R4 R6 6
Fort Lauderdale, FL 18 1 R15 1 0 2 4 1 1 1 0 1 1
Fort Worth-Arlington, TX R5 R19 R5 16 20 7 9 31 28 14 14 17 19
Fresno, CA 15 R83 R12 62 83 69 59 55 61 70 75 67 81
Gary, IN R18 R12 R15 2 8 5 0 6 17 11 12 9 10
Grand Rapids-Muskegon-Holland, MI R9 R21 8 10 26 6 3 12 17 7 8 13 20
Greensboro-Winston-Salem-High Pt, NC R15 R29 R9 12 5 2 20 7 6 6 13 25 20
Greenville-Spartanburg-Anderson, SC 7 R19 5 2 3 5 9 5 8 7 10 R28 19
Harrisburg-Lebanon-Carlisle, PA R6 R17 R6 10 21 1 15 12 13 3 9 22 17
Hartford, CT 15 R18 15 13 23 15 14 18 14 5 16 10 18
Honolulu, HI 14 0 R10 0 0 0 0 0 0 0 0 0 0
Houston, TX R23 R54 R23 R51 R36 32 28 R38 66 R26 47 38 50
Indianapolis, IN R32 R26 R27 9 12 7 9 22 19 13 12 19 21
Jacksonville, FL R14 R3 R14 3 0 2 3 2 1 1 4 10 3
Jersey City, NJ 7 R17 7 15 R26 R11 19 R17 R18 5 9 7 17
Kansas City, MO-KS R21 R5 21 2 11 1 4 10 22 10 18 15 5
Knoxville, TN 18 R62 R15 23 10 7 R25 R16 R24 R20 36 R54 59
Las Vegas, NV-AZ R26 R7 R5 R4 R0 R1 R2 R2 R0 R2 0 0 0
Little Rock-North Little Rock, AR 7 R6 7 1 3 0 2 2 7 1 1 2 6
Los Angeles-Long Beach, CA 38 R27 38 173 R168 175 134 139 113 94 60 56 27
Louisville, KY-IN 26 R44 R20 10 15 2 R23 27 R22 R11 R14 R27 40
Memphis, TN-AR-MS 14 R36 R12 24 9 14 15 10 21 19 17 27 36
Miami, FL 12 R5 R12 1 1 3 6 1 2 1 3 8 5
Middlesex-Somerset-Hunterdon, NJ R5 R26 R3 24 24 8 13 9 16 8 18 21 23
Milwaukee-Waukesha, WI 22 R18 18 8 24 3 4 9 14 5 4 10 13
Minneapolis-St. Paul, MN-WI R36 R0 R20 4 2 R1 0 R2 R5 R0 0 R1 0
Monmouth-Ocean, NJ 4 R27 R4 21 20 R11 R24 R13 R20 R17 R21 R31 27
Nashville, TN 21 R45 R16 R29 R12 6 18 21 R26 R22 20 30 33
Nassau-Suffolk, NY R7 R18 R7 20 25 R7 R17 R15 R10 R8 R12 R11 18
New Haven-Meriden, CT R9 R16 R9 17 29 10 17 14 14 8 19 10 16
New Orleans, LA R10 R18 R10 6 2 5 6 8 20 8 7 7 18
New York, NY R30 R27 29 36 49 10 19 21 19 15 23 17 24
Newark, NJ 12 R21 12 23 35 10 13 13 20 12 13 23 21
Norfolk-VA Beach-Newport News, VA-NC 12 R16 R10 8 7 8 19 6 6 4 17 15 16
Oakland, CA 29 R6 R18 4 4 3 4 3 12 11 0 11 5
Oklahoma City, OK R10 R6 10 4 4 2 2 5 13 2 4 7 6
Omaha, NE-IA 12 5 9 1 0 0 1 1 1 1 0 5 5
Orange County, CA R12 R1 11 45 35 35 25 15 9 9 3 6 1
Orlando, FL 13 R4 R11 4 1 4 4 3 1 1 4 11 4
Philadelphia, PA-NJ 44 R32 36 39 49 24 51 26 30 22 32 37 32
Phoenix-Mesa, AZ R51 37 R25 12 11 13 16 10 22 17 12 17 12
Pittsburgh, PA R42 R26 R42 19 21 9 13 19 25 11 R21 39 23
Ponce, PR 1 0 1 0 0 0 0 0 0 0 0 0 0
Portland-Vancouver, OR-WA R15 R2 R15 11 R9 6 0 2 2 6 0 3 2
Providence-Fall River-Warwick, RI-MA R12 R13 R9 13 20 5 7 7 11 4 10 4 7
Raleigh-Durham-Chapel Hill, NC R17 R29 R5 15 5 0 11 2 1 1 13 21 26
Richmond-Petersburg, VA 11 R25 R11 6 18 8 30 13 19 5 21 28 25
Riverside-San Bernardino, CA R47 R97 R36 R159 154 174 168 149 124 119 R105 R95 93
Rochester, NY 8 R9 8 5 16 2 0 1 6 0 6 4 9
Sacramento, CA 33 R48 R20 R61 R46 R51 R20 R36 R41 R42 R15 R27 38
St. Louis, MO-IL R55 R29 R55 23 32 15 9 32 34 20 15 23 29
Salt Lake City-Ogden, UT R24 R5 R13 5 20 9 5 R12 4 8 1 12 2
San Antonio, TX R4 R9 R4 4 3 1 3 4 18 3 3 6 9
San Diego, CA R27 R17 23 96 67 66 58 46 48 31 14 33 16
San Francisco, CA 11 0 9 0 0 0 0 0 2 0 0 0 0
San Jose, CA R9 R4 8 7 11 3 4 2 10 7 0 5 2
San Juan-Bayamon, PR R21 R3 R11 0 0 0 0 0 0 1 2 1 1
Scranton-Wilkes Barre-Hazleton, PA 11 R12 11 9 17 3 10 7 12 4 11 7 12
Seattle-Bellevue-Everett, WA R24 R1 R17 9 4 3 0 3 0 6 1 3 1
Springfield, MA 13 R10 13 13 15 12 13 12 9 5 10 7 10
Syracuse, NY R7 R4 R7 1 R12 2 4 R1 R5 0 R2 R3 4
Tacoma, WA 9 R0 R8 5 1 2 0 2 0 1 0 4 0
Tampa-St. Petersburg-Clearwater, FL R40 R9 R26 6 1 R2 1 3 2 3 4 11 9
Toledo, OH 6 R9 R5 3 6 2 7 9 9 11 4 5 4
Tucson, AZ R21 R2 20 1 0 1 1 R0 3 0 1 0 2
Tulsa, OK 11 R14 11 16 12 1 4 12 21 14 7 9 14
Ventura, CA 15 R23 12 70 87 54 R43 63 R66 62 R45 29 22
Washington, DC-MD-VA-WV R42 R39 R40 25 48 14 R52 20 29 18 29 R47 39
West Palm Beach-Boca Raton, FL R7 R1 6 0 0 0 3 0 0 0 0 2 1
Wilmington-Newark, DE-MD 10 R21 R9 9 12 R12 R29 R24 R27 R13 R21 R24 21
Youngstown-Warren, OH 15 R13 R14 3 14 R10 R10 R5 R12 R8 R10 R22 12

KEY: 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) 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. In 1999, 4,184 monitoring sites reported air quality data. Air quality monitoring sites are selected as "trend sites" if they have complete data for at least 8 of the 10 years between 1990 and 1999.

SOURCE: U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, National Air Quality and Emissions Trends Report, 1999 (Research Triangle Park, NC: 2001), table A-17.