American Lung association has released a report concerning metros and counties with the most and least polluted air. You'll be glad to know that SLC/Ogden and Provo did not make the list of worst. They did make a list, however, of metros that have problems with spikes in air pollution - but then again, is not the worst. California cities dominate all lists.
Worst year-round particle pollution metros: Bakersfield, Merced, Fresno, Hanford CA, LA/Long Beach/Riverside, Modesto, Visalia, Pittsburg PA, El Centro, Cincinnati OH, Philadelphia, Louisville KY, Allentown/Bethlehem, Canton OH, Fairbanks AK, Macon GA, Atlanta GA, Phx AZ, Cleveland OH, Indianapolis IN, Steubenville OH, Wheeling WV, Birmingham AL, Dayton OH
Worst "spikers" w/bad 24 hour periods of particulates: Bakersfield, Fresno, Hanford, LA/Long Beach/Riverside, Modesto,
SLC/Ogden, Pittsburg, Merced, Fairbanks, Logan UT, Provo, Stockton CA, Las Cruces NM, Eugene OR, Visalia, Chicago, Green Bay, Seattle/Tacoma, Harrisburg PA, Indiapolis, Phx, Allentown/Bethlehem, San Diego, Portland OR, South Bend
worst overall ozone polluted metros: LA/Long Beach/Riverside, Visalia, Bakersfield, Fresno, Hanford, Sacramento, Houston TX, Dallas TX, Washington DC, El Centro, Merced, San Diego, Modesto, Birmingham AL, Cincinnati, Las Vegas, Louisville, NYC, Charlotte, Beaumont TX, Oklahoma City, Philadelphia, Phx, Pittsburg, San Luis Obispo, St. Louis, Tulsa
So you can say "Yea, we're not the worst!" SLC has more hope than many others, too. The population seems to be very aware and wanting the spiking problem fixed. That can't be said of other spikers like Seattle (I'm a former Seattlite) and Portland and Phoenix where they deny they have a problem. I have high hopes for SLC to solve their air quality issues anyway.