The hike did afford us the opportunity to gain a visual perspective on the pollution. The photo below looks southward along the Wasatch Front toward Utah County. Note how the eastern Traverse Range is fully enveloped in smog and that the pollution top along the Wasatch Range is somewhat ill-defined.
The deeper pollution is actually good news for city dwellers since it means we are mixing our emissions through a deeper layer, which leads to lower near-valley-floor concentrations. On the other hand, if you wish to escape the pollution entirely, you need to go higher. Further, the boundary between the polluted and clean air wasn't sharply defined yesterday. During both the ascent and descent, I found it difficult to determine when we were in it or out of it. You see some evidence in the photo above of pollution transport up the western face of the Wasatch and perhaps this made the pollution gradient on Mt. Olympus somewhat ill defined.
In terms of concentrations on the valley floor, the University of Utah observing site at Neil Armstrong Academy in the West Valley showed a steady long-term increase over the past four days with a peak late yesterday near 35 ug/m3.
Gird yourself for a long continuation of this weather pattern. Pity we're back on standard time as the evening mountain bikes were fun.