The air quality forecast for Friday, January 18, is for little change in conditions. Air quality levels will be GOOD 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
FRIDAY, JANUARY 18
THURSDAY, JANUARY 17
Alpine
35
OZONE
29
OZONE
Chula Vista
28
OZONE
25
OZONE
Del Mar
31
OZONE
30
OZONE
Downtown
28
OZONE
25
OZONE
El Cajon
32
OZONE
26
OZONE
Escondido
32
OZONE
26
OZONE
Otay Mesa
42
PM2.5
55
PM2.5
Kearny Mesa
31
OZONE
27
OZONE
Oceanside
31
OZONE
30
OZONE
POLLUTANT SPECIFIC FORECASTS
City
Forecast Maximum AQI OZONE
Forecast Maximum AQI PM2.5
FRIDAY, JANUARY 18
FRIDAY, JANUARY 18
Alpine
35
GOOD
21
GOOD
Chula Vista
28
GOOD
25
GOOD
Del Mar
31
GOOD
25
GOOD
Downtown
28
GOOD
25
GOOD
El Cajon
32
GOOD
29
GOOD
Escondido
32
GOOD
29
GOOD
Otay Mesa
30
GOOD
42
GOOD
Kearny Mesa
31
GOOD
25
GOOD
Oceanside
31
GOOD
25
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.
