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 more favorable conditions. Air quality levels will be GOOD throughout the day.
The air quality forecast for Monday, May 20, is for little change in conditions. Air quality levels will be GOOD 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
MAY 18
MAY 19
MAY 20
MAY 17
Alpine
84
OZONE
46
OZONE
42
OZONE
44
OZONE
Chula Vista
46
OZONE
37
OZONE
32
OZONE
42
OZONE
Del Mar
42
OZONE
37
OZONE
32
OZONE
37
OZONE
Downtown
46
OZONE
37
OZONE
32
OZONE
42
OZONE
El Cajon
51
OZONE
37
OZONE
32
OZONE
42
OZONE
Escondido
51
OZONE
37
OZONE
32
OZONE
42
OZONE
Otay Mesa
46
OZONE
37
OZONE
32
OZONE
39
OZONE
Kearny Mesa
46
OZONE
37
OZONE
32
OZONE
41
OZONE
Oceanside
42
OZONE
37
OZONE
32
OZONE
37
OZONE
POLLUTANT SPECIFIC FORECASTS
City
Forecast Maximum AQI
OZONE
MAY 18
MAY 19
MAY 20
Alpine
84
MODERATE
46
GOOD
42
GOOD
Chula Vista
46
GOOD
37
GOOD
32
GOOD
Del Mar
42
GOOD
37
GOOD
32
GOOD
Downtown
46
GOOD
37
GOOD
32
GOOD
El Cajon
51
MODERATE
37
GOOD
32
GOOD
Escondido
51
MODERATE
37
GOOD
32
GOOD
Otay Mesa
46
GOOD
37
GOOD
32
GOOD
Kearny Mesa
46
GOOD
37
GOOD
32
GOOD
Oceanside
42
GOOD
37
GOOD
32
GOOD
City
Forecast Maximum AQI
PM2.5
MAY 18
MAY 19
MAY 20
Alpine
21
GOOD
13
GOOD
8
GOOD
Chula Vista
42
GOOD
29
GOOD
21
GOOD
Del Mar
42
GOOD
29
GOOD
21
GOOD
Downtown
42
GOOD
29
GOOD
21
GOOD
El Cajon
38
GOOD
25
GOOD
21
GOOD
Escondido
38
GOOD
25
GOOD
21
GOOD
Otay Mesa
42
GOOD
29
GOOD
21
GOOD
Kearny Mesa
42
GOOD
29
GOOD
21
GOOD
Oceanside
38
GOOD
25
GOOD
21
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.
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.