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Air Quality Forecast

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The air quality forecast for Saturday, December 20, is for little change in conditions. Air quality levels will be GOOD throughout the day.

The air quality forecast for Sunday, December 21, is for less favorable conditions. Air quality levels will be GOOD to MODERATE during the day.

The air quality forecast for Monday, December 22, is for little change in conditions. Air quality levels will be GOOD to MODERATE during 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

  DECEMBER 20

DECEMBER 21

DECEMBER 22

DECEMBER 19

Alpine

38

OZONE

38

OZONE

38

OZONE

42

OZONE

Chula Vista

38

PM2.5

50

PM2.5

50

PM2.5

36

PM2.5

Del Mar

38

PM2.5

50

PM2.5

50

PM2.5

35

PM2.5

Downtown

46

PM2.5

55

PM2.5

55

PM2.5

41

PM2.5

El Cajon

46

PM2.5

55

PM2.5

55

PM2.5

41

PM2.5

Escondido

46

PM2.5

55

PM2.5

55

PM2.5

41

PM2.5

Otay Mesa

46

PM2.5

55

PM2.5

55

PM2.5

41

PM2.5

Kearny Mesa

42

PM2.5

53

PM2.5

53

PM2.5

37

PM2.5

Oceanside

46

PM2.5

55

PM2.5

55

PM2.5

31

OZONE


POLLUTANT SPECIFIC FORECASTS

City

Forecast Maximum AQI
OZONE

  DECEMBER 20

DECEMBER 21

DECEMBER 22

Alpine

38

GOOD

38

GOOD

38

GOOD

Chula Vista

34

GOOD

34

GOOD

34

GOOD

Del Mar

34

GOOD

34

GOOD

34

GOOD

Downtown

30

GOOD

30

GOOD

30

GOOD

El Cajon

34

GOOD

34

GOOD

34

GOOD

Escondido

34

GOOD

34

GOOD

34

GOOD

Otay Mesa

34

GOOD

34

GOOD

34

GOOD

Kearny Mesa

34

GOOD

34

GOOD

34

GOOD

Oceanside

34

GOOD

34

GOOD

34

GOOD

 

City

Forecast Maximum AQI
PM2.5
  DECEMBER 20

DECEMBER 21

DECEMBER 22

Alpine

25

GOOD

25

GOOD

25

GOOD

Chula Vista

38

GOOD

50

GOOD

50

GOOD

Del Mar

38

GOOD

50

GOOD

50

GOOD

Downtown

46

GOOD

55

MODERATE

55

MODERATE

El Cajon

46

GOOD

55

MODERATE

55

MODERATE

Escondido

46

GOOD

55

MODERATE

55

MODERATE

Otay Mesa

46

GOOD

55

MODERATE

55

MODERATE

Kearny Mesa

42

GOOD

53

MODERATE

53

MODERATE

Oceanside

46

GOOD

55

MODERATE

55

MODERATE

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.

BR / 1630 PST