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Air Quality Forecast

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The air quality forecast for Tuesday, March 31, is for little change in conditions. Air quality levels will be GOOD to MODERATE throughout the day.

The air quality forecast for Wednesday, April 1, is for little change in conditions. Air quality levels will be GOOD to MODERATE throughout the day.

Forecasts for Sunday and Monday are issued on Friday and subject to be slightly different due to unexpected changes in meteorological conditions. Please refer to the "Current Ozone & PM2.5 Pollution Map" for up to date information.

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
and Pollutant

Measured Maximum AQI
and Pollutant

 

TUESDAY, MARCH 31

WEDNESDAY, APRIL 1

MONDAY, MARCH 30

Alpine

58

OZONE

58

OZONE

51

OZONE

Chula Vista

46

PM2.5

46

PM2.5

43

PM2.5

Del Mar

50

PM2.5

50

PM2.5

52

PM2.5

Downtown

50

PM2.5

50

PM2.5

50

PM2.5

El Cajon

50

PM2.5

50

PM2.5

50

PM2.5

Escondido

50

PM2.5

50

PM2.5

50

PM2.5

Otay Mesa

63

PM2.5

63

PM2.5

66

PM2.5

Kearny Mesa

46

PM2.5

46

PM2.5

43

PM2.5

Oceanside

50

PM2.5

50

PM2.5

52

PM2.5


POLLUTANT SPECIFIC FORECASTS

City

Forecast Maximum AQI
OZONE

 

TUESDAY, MARCH 31

WEDNESDAY, APRIL 1

Alpine

58

MODERATE

58

MODERATE

Chula Vista

36

GOOD

36

GOOD

Del Mar

36

GOOD

36

GOOD

Downtown

39

GOOD

39

GOOD

El Cajon

40

GOOD

40

GOOD

Escondido

42

GOOD

42

GOOD

Otay Mesa

42

GOOD

42

GOOD

Kearny Mesa

40

GOOD

40

GOOD

Oceanside

37
GOOD
37

GOOD

 

City

Forecast Maximum AQI
PM2.5

 

TUESDAY, MARCH 31

WEDNESDAY, APRIL 1

Alpine

33

GOOD

33

GOOD

Chula Vista

46

GOOD

46

GOOD

Del Mar

50

GOOD

50

GOOD

Downtown

50

GOOD

50

GOOD

El Cajon

50

GOOD

50

GOOD

Escondido

50

GOOD

50

GOOD

Otay Mesa

63

GOOD

63

GOOD

Kearny Mesa

46
GOOD
46

GOOD

Oceanside

50
GOOD
50

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.

RD / 1630 PDT