The air quality forecast for Saturday, April 21, is for little change in conditions. Air quality levels will be GOOD to MODERATE throughout the day.
The air quality forecast for Sunday, April 22, is for little change in conditions. Air quality levels will be GOOD to MODERATE throughout the day.
The air quality forecast for Monday, April 23, is for little change in conditions. Air quality levels will be GOOD to MODERATE throughout the day.
The Forecasts for Sunday and Monday were issued on Friday and subject to be slightly different due to unexpected changes in meteorological conditions. Please refer to the "Current Ozone & PM2.5 Pollution Map" for up to date information.
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
and Pollutant
Measured Maximum AQI
and Pollutant
APRIL 21
APRIL 22
APRIL 23
APRIL 20
Alpine
67
OZONE
67
OZONE
61
OZONE
58
OZONE
Chula Vista
43
OZONE
44
OZONE
42
OZONE
41
OZONE
Del Mar
46
OZONE
46
OZONE
44
OZONE
44
OZONE
Downtown
43
OZONE
44
OZONE
42
OZONE
41
OZONE
El Cajon
58
OZONE
61
OZONE
53
PM2.5
51
OZONE
Escondido
58
OZONE
61
OZONE
53
PM2.5
51
OZONE
Otay Mesa
49
OZONE
53
PM2.5
55
PM2.5
47
OZONE
Kearny Mesa
49
OZONE
50
OZONE
46
OZONE
47
OZONE
Oceanside
46
OZONE
46
OZONE
44
OZONE
44
OZONE
POLLUTANT SPECIFIC FORECASTS
City
Forecast Maximum AQI
OZONE
APRIL 21
APRIL 22
APRIL 23
Alpine
67
MODERATE
67
MODERATE
61
MODERATE
Chula Vista
43
GOOD
44
GOOD
42
GOOD
Del Mar
46
GOOD
46
GOOD
44
GOOD
Downtown
43
GOOD
44
GOOD
42
GOOD
El Cajon
58
MODERATE
61
MODERATE
51
MODERATE
Escondido
58
MODERATE
61
MODERATE
51
MODERATE
Otay Mesa
49
GOOD
50
GOOD
46
GOOD
Kearny Mesa
49
GOOD
50
GOOD
46
GOOD
Oceanside
46
GOOD
46
GOOD
44
GOOD
City
Forecast Maximum AQI
PM2.5
APRIL 21
APRIL 22
APRIL 23
Alpine
17
GOOD
21
GOOD
25
GOOD
Chula Vista
25
GOOD
33
GOOD
38
GOOD
Del Mar
25
GOOD
33
GOOD
38
GOOD
Downtown
25
GOOD
33
GOOD
38
GOOD
El Cajon
33
GOOD
46
GOOD
53
MODERATE
Escondido
33
GOOD
46
GOOD
53
MODERATE
Otay Mesa
42
GOOD
53
MODERATE
55
MODERATE
Kearny Mesa
25
GOOD
33
GOOD
38
GOOD
Oceanside
25
GOOD
33
GOOD
38
GOOD
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.
