Here is a gov't web cam site I use, as it also at 5,000 feet as we are, and
has a similar view. It shows "moderate" today.
NPS: Nature & Science» Air Resources Division - Great Smoky Mountains NP Web Camera
The short version of WNC air quality,
imo: The area is in the Smokies, and is
aptly named. Haze, particulates and "stuff" tends to hang in the mtns, and
settle in the valleys and not be blown away. We also get more than our fair
share from the power plants "up wind", in TN, KY, OH, etc., I am told.
Add in the normal "stuff" from driving, living, etc., which tends to collect and
settle in the valleys, and moderate to crummy on the charts, comes up with
some regularity. A good rain knocks it back to green, and "good".
I've been here only 9+yrs, but except for a few days, (from fading memory),
it is not comparable to LA basin on a bad day(s), imo.
Another gov't site, Western NC Air Quality, fwiw:
Asheville Air Quality (http://www.wncairquality.org/Air%20Quality/asheville_aqi.htm - broken link)
GL, mD