U.S. Air Quality
The Smog Blog
April 18, 2009
Moderate PM air quality and moderate ozone in the Great Lakes states
April 4, 2009
Fires in Oklahoma leads to moderate air quality; ozone high over the Gulf
March 14, 2009
Good air quality throughout the south, scattered moderate in the North
March 7, 2009
Ditto.
February 21, 2009
Southeastern fires, fires, and more fires