The air quality forecast for Wednesday, May 18 is for little
change in conditions. Air quality levels will be GOOD to MODERATE
throughout the day.
The air quality forecast for Thursday, May 19 is for little change in conditions. Air quality levels will be GOOD to MODERATE throughout the day.
Air quality reports use the Air Quality Index, which represents the
higher of two pollutants - PM2.5 or ozone. For ground-level
these values are based upon an 8-hour running average. For
ground-level particulate matter with a diameter less than 2.5
microns (PM2.5), these values
are based upon a 24-hour daily average.
In cases where this page is not updated properly, or to hear the air
pollution forecast, please call our air pollution recording line at
If you need air quality information, please call (858) 586-2769. If you have an air pollution complaint, or see an air pollution problem, please call (858) 586-2650. Thank you.