The report below displays data on the total number of days in Tennessee 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
Knoxville
Memphis
Nashville
1990
47
50
46
1991
36
29
37
1992
17
27
14
1993
49
31
38
1994
38
37
31
1995
60
56
46
1996
58
39
46
1997
70
35
44
1998
97
55
45
1999
98
56
66
2000
65
52
49
2001
58
33
23
2002
69
34
33
2003
31
29
20
2004
14
11
7
2005
39
37
26
2006
30
30
17
2007
51
35
35
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.
