The report below displays data on the total number of days in Delaware 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
Wilmington-Newark
1990
0
1991
0
1992
22
1993
45
1994
46
1995
47
1996
22
1997
31
1998
42
1999
40
2000
24
2001
36
2002
34
2003
24
2004
10
2005
22
2006
20
2007
25
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.
