The air quality forecast for Thursday, June 21, is for less favorable conditions. Air quality levels will be GOOD to UNHEALTHY for SENSITIVE GROUPS 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
THURSDAY, JUNE 21
WEDNESDAY, JUNE 20
Alpine
101
OZONE
74
OZONE
Chula Vista
42
OZONE
44
OZONE
Del Mar
42
OZONE
41
OZONE
Downtown
42
OZONE
44
OZONE
El Cajon
61
OZONE
49
OZONE
Escondido
61
OZONE
49
OZONE
Otay Mesa
53
PM2.5
46
OZONE
Kearny Mesa
48
OZONE
45
OZONE
Oceanside
42
OZONE
41
OZONE
POLLUTANT SPECIFIC FORECASTS
City
Forecast Maximum AQI OZONE
Forecast Maximum AQI PM2.5
THURSDAY, JUNE 21
THURSDAY, JUNE 21
Alpine
101
U.S.G.
38
GOOD
Chula Vista
42
GOOD
42
GOOD
Del Mar
42
GOOD
42
GOOD
Downtown
42
GOOD
42
GOOD
El Cajon
61
MODERATE
38
GOOD
Escondido
61
MODERATE
38
GOOD
Otay Mesa
49
GOOD
53
MODERATE
Kearny Mesa
48
GOOD
42
GOOD
Oceanside
42
GOOD
42
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.
