Highlights of the Clean Air Watch Smog Survey for July 2006:
July 2006 was marginally worse than July 2005. Smog levels above public health standards were recorded about 1,020 times in July 2006 compared to about 980 times a year ago. Thirty-eight states plus the District of Columbia experienced unhealthful levels of smog last month.
Bad air quality was recorded in a number of national parks during July, including Acadia National Park in Maine, Great Smoky Mountains National Park in North Carolina and Tennessee, Rocky Mountain National Park in Colorado, and Death Valley National Park, Joshua Tree National Park, Pinnacles National Monument, and Sequoia National Park, all in California.
Mount Vernon, Virginia, also experienced air bad enough to make George Washington gag.
States with smog problems in 2006, through July (all but New Hampshire had smog levels above public health standards during July).