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),,,,,,,,,,,,,,,
,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
,,,,,,,,,,,,,,continued
Table 4-47 continued,,,,,,,,,,,,,,
,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
"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. ",,,,,,,,,,,,,,

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