The report below displays data on the total number of days in North Carolina 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
Charlotte-Gastonia-Rock Hill
Greensboro-Winston Salem-High Point
Norfolk-Virginia Beach-Newport News
Raleigh-Durham-Chapel Hill
1990
60
31
24
37
1991
31
19
29
16
1992
30
19
19
11
1993
47
56
41
29
1994
15
20
19
11
1995
32
25
22
10
1996
40
18
12
13
1997
41
30
37
29
1998
67
48
34
46
1999
62
38
32
43
2000
40
29
23
16
2001
32
22
14
11
2002
42
42
31
39
2003
12
13
10
8
2004
17
5
5
3
2005
26
14
12
12
2006
21
8
11
7
2007
33
21
9
17
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.
