Depends on where you put the probe in LA honestly. Downwind of the airport or the port are a different story than against the coast where there's almost always

Depends on where you put the probe in LA honestly. Downwind of the airport or the port are a different story than against the coast where there's almost always a prevailing wind blowing stuff inland. There are also hillside neighborhoods high enough were you can end up above the inversion layer sometimes. You look at some of the top hits of that list you see Bakersfield, Fresno, and Sacramento, all a fraction of the size of LA but they get such bad air from all the agriculture happening in the central valley.