The report below displays data on the total number of days in Texas with an Air Quality Index Value of
over 100. This data has been compiled from 1990-2007. Some states have multiple monitoring stations and each will be listed in the reports below.
Other states do not have any monitoring stations in which case we have selected the closest station available.
Year
Austin-San Marcos
Dallas
El Paso
Fort Worth-Arlington
Houston
San Antonio
1990
10
0
17
30
66
143
1991
13
0
7
30
49
112
1992
11
19
13
15
42
105
1993
6
16
14
17
36
91
1994
8
35
8
53
55
90
1995
28
36
6
52
82
94
1996
5
22
10
28
38
61
1997
2
35
5
27
58
39
1998
9
54
12
32
61
51
1999
14
33
7
33
64
49
2000
14
44
15
38
57
58
2001
5
32
13
31
42
53
2002
8
18
10
37
40
35
2003
9
13
10
38
47
40
2004
8
15
3
25
37
27
2005
9
33
8
43
49
26
2006
13
28
8
34
31
39
2007
4
11
6
12
25
33
According to the EPA, an Air Quality Index Value of over 100 presents some level of health concern. The higher the number, the
higher the level of concern. The EPA provides the following table and more information on Air Quality Index can be found at
WikiPedia.
