http://www.cde.state.co.us/stateinfo/
National air toxics trends study in Grand Junction, Colorado.
HE17/26.2/G76/INTERNET
Library has 2004-
2011 (PDF)
2010 (PDF)
2009 (PDF)
2008 (PDF)
2007 (PDF)
2006 (PDF)
2005 (PDF)
2004 (PDF)