The air quality forecast for Tuesday, September 26, 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 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
Pollutant
Measured Maximum AQI
Pollutant
TUESDAY, SEPTEMBER 26
MONDAY, SEPTEMBER 25
Alpine
61
OZONE
51
OZONE
Chula Vista
50
OZONE
48
OZONE
Del Mar
50
OZONE
45
OZONE
Downtown
50
OZONE
52
PM2.5
El Cajon
50
OZONE
47
OZONE
Escondido
50
OZONE
47
OZONE
Otay Mesa
50
OZONE
52
PM2.5
Kearny Mesa
50
OZONE
45
OZONE
Oceanside
50
OZONE
45
OZONE
POLLUTANT SPECIFIC FORECASTS
City
Forecast Maximum AQI OZONE
Forecast Maximum AQI PM2.5
TUESDAY, SEPTEMBER 26
TUESDAY, SEPTEMBER 26
Alpine
61
MODERATE
13
GOOD
Chula Vista
50
GOOD
33
GOOD
Del Mar
50
GOOD
38
GOOD
Downtown
50
GOOD
46
GOOD
El Cajon
50
GOOD
33
GOOD
Escondido
50
GOOD
33
GOOD
Otay Mesa
50
GOOD
46
GOOD
Kearny Mesa
50
GOOD
42
GOOD
Oceanside
50
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.
