The image on the top left shows the Air Quality Index (AQI) loop from the US EPA's Air Now website. Much of California today was covered by moderate air quality (Code Yellow). These areas of moderate air quality blanked of the state during the day, and yielded a few regions of unhealthy for sensitive groups (code orange). In the eastern half the country, moderate air quality covered much of the of the Ohio River Valley area, Mid-Atlantic, and southern states, along with with a few spots in New England. A patch of code orange persisted throughout the day in Northwestern Pennsylvania. Comparing the AQI loop against the Ozone loop on the top right suggests PM2.5, not ozone, was the source of much of today's air quality events. A few isolated spots of moderate levels of ozone were reported in California, and in New England lin the early afternoon.
The HMS image from NOAA shows no smoke plumes over the continental United States today. A few fires burn in the souther states, and scattered throughout the west. The air optical depth from the GASP image on the lower right shows two spots of higher optical depth over the United States today. One spot was reported over the Ohio River Valley, and another was reported over the Plain States.