The air quality forecast for Friday, July 4, is for little change in conditions. Air quality levels will range from Good to Unhealthy for Sensitive Groups throughout the day.
The air quality forecast for Saturday, July 5, is for more favorable conditions. Air quality levels will range from Good to Unhealthy for Sensitive Groups throughout the day.
The air quality forecast for Sunday, July 6, is for less favorable conditions. Air quality levels will range from Good to Unhealthy for Sensitive Groups throughout the day.
Forecasts for Saturday and Sunday are issued on Thursday and subject to be slightly different due to unexpected changes in meteorological conditions. Please refer to the "Current 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
JULY 4
JULY 5
JULY 6
JULY 3
Alpine
132
OZONE
109
OZONE
116
OZONE
137
OZONE
Chula Vista
52
PM2.5
45
PM2.5
52
PM2.5
53
PM2.5
Del Mar
49
OZONE
47
OZONE
52
PM2.5
51
PM2.5
Downtown
58
PM2.5
52
PM2.5
58
PM2.5
60
PM2.5
El Cajon
62
PM2.5
60
PM2.5
62
PM2.5
65
PM2.5
Escondido
80
OZONE
54
OZONE
71
OZONE
80
OZONE
Otay Mesa
58
PM2.5
54
PM2.5
58
PM2.5
60
PM2.5
Kearny Mesa
49
PM2.5
47
OZONE
49
PM2.5
51
PM2.5
Oceanside
76
PM2.5
68
PM2.5
76
PM2.5
80
PM2.5
POLLUTANT SPECIFIC FORECASTS
City
Forecast Maximum AQI
OZONE
JULY 4
JULY 5
JULY 6
Alpine
132
U.S.G.
109
U.S.G.
116
U.S.G.
Chula Vista
43
GOOD
43
GOOD
43
GOOD
Del Mar
49
GOOD
47
GOOD
49
GOOD
Downtown
36
GOOD
36
GOOD
36
GOOD
El Cajon
54
MODERATE
54
MODERATE
54
MODERATE
Escondido
80
MODERATE
54
MODERATE
71
MODERATE
Otay Mesa
42
GOOD
42
GOOD
42
GOOD
Kearny Mesa
48
GOOD
47
GOOD
47
GOOD
Oceanside
49
GOOD
47
GOOD
49
GOOD
City
Forecast Maximum AQI
PM2.5
JULY 4
JULY 5
JULY 6
Alpine
60
MODERATE
54
MODERATE
58
MODERATE
Chula Vista
52
MODERATE
45
GOOD
52
MODERATE
Del Mar
49
GOOD
45
GOOD
52
MODERATE
Downtown
58
MODERATE
52
MODERATE
58
MODERATE
El Cajon
62
MODERATE
60
MODERATE
62
MODERATE
Escondido
56
MODERATE
52
MODERATE
58
MODERATE
Otay Mesa
58
MODERATE
54
MODERATE
58
MODERATE
Kearny Mesa
49
GOOD
45
GOOD
49
GOOD
Oceanside
76
MODERATE
68
MODERATE
76
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.
