The air quality forecast for Thursday, September 2, is for little change in conditions. Air Quality Levels will be GOOD to MODERATE throughout the day.
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
Pollutant
Measured Maximum AQI
Pollutant
THURSDAY, SEPTEMBER 2
WEDNESDAY, SEPTEMBER 1
Alpine
93
OZONE
71
OZONE
Chula Vista
45
PM2.5
41
OZONE
Del Mar
46
OZONE
42
OZONE
Downtown
52
PM2.5
36
PM2.5
El Cajon
55
PM2.5
45
PM2.5
Escondido
57
PM2.5
45
PM2.5
Otay Mesa
55
PM2.5
36
PM2.5
Kearny Mesa
45
PM2.5
37
OZONE
Oceanside
52
PM2.5
42
PM2.5
POLLUTANT SPECIFIC FORECASTS
City
Forecast Maximum AQI OZONE
Forecast Maximum AQI PM2.5
THURSDAY, SEPTEMBER 2
THURSDAY, SEPTEMBER 2
Alpine
93
MODERATE
49
GOOD
Chula Vista
45
GOOD
45
GOOD
Del Mar
46
GOOD
45
GOOD
Downtown
39
GOOD
52
MODERATE
El Cajon
46
GOOD
55
MODERATE
Escondido
48
GOOD
57
MODERATE
Otay Mesa
37
GOOD
55
MODERATE
Kearny Mesa
42
GOOD
45
GOOD
Oceanside
46
GOOD
52
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.
