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Table 7-7: Air Pollution in the 50 Largest Metropolitan Areas
(Number of days with AQI values greater than 100)
Excel | CSV
| Atlanta,
GA |
66 |
30 |
14 |
30 |
11 |
| Austin-San
Marcos, TX |
8 |
6 |
0 |
5 |
3 |
| Baltimore,
MD |
40 |
16 |
26 |
39 |
10 |
| Boston,
MA-NH |
8 |
1 |
12 |
13 |
3 |
| Buffalo-Niagara
Falls, NY |
8 |
5 |
13 |
21 |
7 |
| Chicago,
IL |
14 |
1 |
16 |
20 |
4 |
| Cincinnati,
OH-KY-IN |
26 |
9 |
6 |
26 |
7 |
| Cleveland-Lorain-Elyria,
OH |
20 |
4 |
17 |
29 |
6 |
| Columbus,
OH |
21 |
6 |
7 |
19 |
5 |
| Dallas,
TX |
25 |
22 |
16 |
15 |
12 |
| Denver,
CO |
3 |
2 |
2 |
7 |
17 |
| Detroit,
MI |
14 |
3 |
16 |
21 |
7 |
| Fort
Lauderdale, FL |
1 |
1 |
2 |
1 |
0 |
| Honolulu,
HI |
2 |
2 |
2 |
2 |
U |
| Houston,
TX |
51 |
43 |
28 |
23 |
30 |
| Indianapolis,
IN |
24 |
4 |
8 |
23 |
11 |
| Jacksonville,
FL |
2 |
0 |
0 |
0 |
0 |
| Kansas
City, MO-KS |
3 |
10 |
4 |
7 |
10 |
| Las
Vegas, NV-AZ |
0 |
0 |
1 |
2 |
2 |
| Los
Angeles-Long Beach, CA |
19 |
45 |
37 |
35 |
61 |
| Louisville,
KY-IN |
44 |
10 |
10 |
26 |
7 |
| Memphis,
TN-AR-MS |
35 |
24 |
13 |
16 |
9 |
| Miami,
FL |
5 |
0 |
1 |
0 |
1 |
| Milwaukee-Waukesha,
WI |
17 |
4 |
12 |
12 |
8 |
| Minneapolis-St.
Paul, MN-WI |
0 |
0 |
2 |
1 |
1 |
| New
Orleans, LA |
18 |
17 |
5 |
2 |
8 |
| New
York, NY |
25 |
11 |
16 |
30 |
7 |
| Norfolk-VA
Beach-Newport News, VA-NC |
16 |
5 |
6 |
15 |
4 |
| Oklahoma
City, OK |
4 |
6 |
2 |
2 |
2 |
| Orlando,
FL |
4 |
3 |
3 |
1 |
0 |
| Philadelphia,
PA-NJ |
32 |
17 |
27 |
33 |
13 |
| Phoenix-Mesa,
AZ |
10 |
9 |
6 |
6 |
7 |
| Pittsburgh,
PA |
23 |
4 |
19 |
28 |
7 |
| Portland-Vancouver,
OR-WA |
0 |
0 |
0 |
1 |
0 |
| Providence-Fall
River-Warwick, RI-MA |
2 |
2 |
10 |
9 |
4 |
| Richmond-Petersburg,
VA |
21 |
5 |
12 |
21 |
3 |
| Riverside-San
Bernardino, CA |
96 |
98 |
92 |
96 |
102 |
| Sacramento,
CA |
40 |
31 |
35 |
39 |
36 |
| St.
Louis, MO-IL |
29 |
16 |
14 |
32 |
11 |
| Salt
Lake City-Ogden, UT |
4 |
7 |
4 |
7 |
3 |
| San
Antonio, TX |
9 |
0 |
0 |
17 |
4 |
| San
Diego, CA |
16 |
14 |
17 |
13 |
6 |
| San
Francisco, CA |
0 |
0 |
0 |
0 |
0 |
| San
Jose, CA |
3 |
1 |
3 |
6 |
6 |
| Seattle-Bellevue-Everett,
WA |
0 |
0 |
0 |
0 |
0 |
| Tampa-St.
Petersburg-Clearwater, FL |
9 |
6 |
4 |
0 |
4 |
| Tucson,
AZ |
1 |
0 |
0 |
1 |
1 |
| Tulsa,
OK |
13 |
10 |
4 |
5 |
7 |
| Washington,
DC-MD-VA-WV |
39 |
11 |
22 |
34 |
8 |
| West
Palm Beach-Boca Raton, FL |
1 |
0 |
1 |
0 |
0 |
KEY: AQI = Air Quality Index; U = data are not available.
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.
SOURCES:
All data except Honolulu: 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.
Honolulu: U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, National Air Quality and Emissions Trends Report, 2002 (Research Triangle Park, NC: 2003), table A-17. Available at http://www.epa.gov/airtrends/table_a-17_2002.pdf as of Sept. 30, 2003.
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