I know this is late, but this is my section as well. Unfortunate that we won't finish the playoffs before regionals start. Anyways, to answer about the air quality, CIF has a rule that the air quality must be 150 or lower. Anything 151 or above and the game cannot be played. I assume that a site administrator would be in charge of monitoring the AQI readings from the EPA's website and if the numbers went above 150 then you'd have to suspend play immediately.
Fortunately the AQI is fine now and everyone is playing today, but I just saw that nobody had answered so wanted to add that information.