The air quality forecast for Saturday, May 18, is for little change in conditions. Air quality levels will be GOOD to MODERATE throughout the day.
The air quality forecast for Sunday, May 19, is for less favorable conditions. Air quality levels will be GOOD to MODERATE throughout the day.
The air quality forecast for Monday, May 20, is for less favorable conditions. Air quality levels will be GOOD to MODERATE throughout the day.
Forecasts for Sunday and Monday are 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 three pollutants - PM2.5, PM10 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)or less than 10 microns (PM10), 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
MAY 18
MAY 19
MAY 20
MAY 17
Alpine
55
PM2.5
67
OZONE
84
OZONE
56
PM2.5
Chula Vista
46
PM2.5
53
PM2.5
55
PM2.5
41
PM2.5
Del Mar
53
PM2.5
55
PM2.5
57
PM2.5
50
PM2.5
Downtown
53
PM2.5
57
PM2.5
59
PM2.5
48
PM2.5
El Cajon
55
PM2.5
59
PM2.5
63
PM2.5
54
PM2.5
Escondido
55
PM2.5
59
PM2.5
63
PM2.5
56
PM2.5
Otay Mesa
53
PM2.5
57
PM2.5
59
PM2.5
48
PM2.5
Kearny Mesa
46
PM2.5
50
PM2.5
53
PM2.5
42
PM2.5
Oceanside
53
PM2.5
55
PM2.5
57
PM2.5
52
PM2.5
POLLUTANT SPECIFIC FORECASTS
City
Forecast Maximum AQI
OZONE
MAY 18
MAY 19
MAY 20
Alpine
47
GOOD
67
MODERATE
84
MODERATE
Chula Vista
38
GOOD
38
GOOD
38
GOOD
Del Mar
34
GOOD
34
GOOD
34
GOOD
Downtown
25
GOOD
25
GOOD
30
GOOD
El Cajon
38
GOOD
47
GOOD
51
MODERATE
Escondido
38
GOOD
47
GOOD
51
MODERATE
Otay Mesa
34
GOOD
38
GOOD
38
GOOD
Kearny Mesa
38
GOOD
42
GOOD
47
GOOD
Oceanside
34
GOOD
38
GOOD
38
GOOD
City
Forecast Maximum AQI
PM2.5
MAY 18
MAY 19
MAY 20
Alpine
55
MODERATE
50
GOOD
42
GOOD
Chula Vista
46
GOOD
53
MODERATE
55
MODERATE
Del Mar
53
MODERATE
55
MODERATE
57
MODERATE
Downtown
53
MODERATE
57
MODERATE
59
MODERATE
El Cajon
55
MODERATE
59
MODERATE
63
MODERATE
Escondido
55
MODERATE
59
MODERATE
63
MODERATE
Otay Mesa
53
MODERATE
57
MODERATE
59
MODERATE
Kearny Mesa
46
GOOD
50
GOOD
53
MODERATE
Oceanside
53
MODERATE
55
MODERATE
57
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) 586-2707. If you have an air pollution complaint, or see an air pollution problem, please call (858) 586-2650. Thank you.
