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Data Graph Name
Number of Days U.S. Air Quality Index Over 100
Topic Environment Issue Group Pollution


 
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 Name Numbers of Days US Air Quality Index Over 100 DP [899] - Numbers of Days US Air Quality Index Over 100 [16074]
Units of Measure  
Last Updated 12/8/2011
Source EPA
Source URL http://www.epa.gov/air/airtrends/aqi_info.html
Source Document  
Updater (no editor) 
Display on Graph Yes
Legend   [899] - www.data360.org
Notes  
2010 1,012 
2009 888 
2008 1,505 
2007 2,108 
2006 2,063 
2005 2,540 
2004 1,886 
2003 2,500 
2002 3,382 
2001 3,139 
2000 2,968 
1999 3,800 
1998 3,416 
1997 2,823 
1996 2,975 
1995 3,506 
1994 3,535 
1993 3,656 
1992 3,468 
1991 4,213 
1990 4,091