The air quality forecast for Tuesday, August 21, is for little change in conditions. Air quality levels will be 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 ozone (O3), 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.
Air Quality Index
(AQI) Values
Levels of Health Concern
Colors
When the AQI
is in this range:
...air quality conditions are:
...as symbolized
by this color:
0 to 50
Good
Green
51 to 100
Moderate
Yellow
101 to 150
Unhealthy for
Sensitive Groups (U.S.G)
Orange
151 to 200
Unhealthy
Red
201 to 300
Very Unhealthy
Purple
301 to 500
Hazardous
Maroon
City
Forecast Maximum AQI
Pollutant
Measured Maximum AQI
Pollutant
TUESDAY, AUGUST 21
MONDAY, AUGUST 20
Alpine
93
OZONE
84
OZONE
Chula Vista
59
PM2.5
57
PM2.5
Del Mar
59
PM2.5
57
PM2.5
Downtown
59
PM2.5
57
PM2.5
El Cajon
68
PM2.5
66
PM2.5
Escondido
70
PM2.5
68
PM2.5
Otay Mesa
70
PM2.5
67
PM2.5
Kearny Mesa
59
PM2.5
57
PM2.5
Oceanside
59
PM2.5
57
PM2.5
POLLUTANT SPECIFIC FORECASTS
City
Forecast Maximum AQI OZONE
Forecast Maximum AQI PM2.5
TUESDAY, AUGUST 21
TUESDAY, AUGUST 21
Alpine
51
MODERATE
63
MODERATE
Chula Vista
37
GOOD
59
MODERATE
Del Mar
32
GOOD
59
MODERATE
Downtown
37
GOOD
59
MODERATE
El Cajon
51
MODERATE
68
MODERATE
Escondido
51
MODERATE
70
MODERATE
Otay Mesa
46
GOOD
70
MODERATE
Kearny Mesa
46
GOOD
59
MODERATE
Oceanside
32
GOOD
59
MODERATE
In cases where this page is not updated properly, or to hear
the official air pollution forecast, please call our air pollution recording
line at (858) 586-2800. This recording is updated daily Monday through Friday at 4:30 PM.
If you need air quality information, please call (858) 586-2600. If you have an air pollution complaint, or see an air pollution problem, please call (858) 586-2650. Thank you.
