The air quality forecast for Wednesday, July 24, 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
WEDNESDAY, JULY 24
TUESDAY, JULY 23
Alpine
100
OZONE
97
OZONE
Chula Vista
38
PM2.5
35
PM2.5
Del Mar
38
PM2.5
35
PM2.5
Downtown
38
PM2.5
35
PM2.5
El Cajon
51
OZONE
58
OZONE
Escondido
51
OZONE
58
OZONE
Otay Mesa
55
PM2.5
53
PM2.5
Kearny Mesa
41
OZONE
42
OZONE
Oceanside
38
PM2.5
35
PM2.5
POLLUTANT SPECIFIC FORECASTS
City
Forecast Maximum AQI OZONE
Forecast Maximum AQI PM2.5
WEDNESDAY, JULY 24
WEDNESDAY, JULY 24
Alpine
100
MODERATE
38
GOOD
Chula Vista
33
GOOD
38
GOOD
Del Mar
30
GOOD
38
GOOD
Downtown
33
GOOD
38
GOOD
El Cajon
51
MODERATE
50
GOOD
Escondido
51
MODERATE
50
GOOD
Otay Mesa
41
GOOD
55
MODERATE
Kearny Mesa
41
GOOD
38
GOOD
Oceanside
30
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.
