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Air Quality Forecast

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The air quality forecast for Saturday, October 25, is for more favorable conditions. Air quality levels will be GOOD to MODERATE throughout the day.

The air quality forecast for, Sunday, October 26, is for more favorable conditions. Air quality levels will be GOOD throughout the day.

The air quality forecast for Monday, October 27, is for little change in conditions. Air quality levels will be GOOD 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

  OCTOBER 25

OCTOBER 26

OCTOBER 27

OCTOBER 24

Alpine

51

OZONE

42

OZONE

42

OZONE

47

OZONE

Chula Vista

50

PM2.5

34

OZONE

34

OZONE

55

PM2.5

Del Mar

53

PM2.5

34

OZONE

34

OZONE

64

OZONE

Downtown

55

PM2.5

38

PM2.5

38

PM2.5

61

PM2.5

El Cajon

55

PM2.5

38

PM2.5

38

PM2.5

68

PM2.5

Escondido

55

PM2.5

38

PM2.5

38

PM2.5

68

PM2.5

Otay Mesa

55

PM2.5

38

PM2.5

38

PM2.5

61

PM2.5

Kearny Mesa

50

PM2.5

34

OZONE

34

OZONE

54

PM2.5

Oceanside

50

PM2.5

38

PM2.5

38

PM2.5

54

PM2.5


POLLUTANT SPECIFIC FORECASTS

City

Forecast Maximum AQI
OZONE

  OCTOBER 25

OCTOBER 26

OCTOBER 27

Alpine

51

MODERATE

42

GOOD

42

GOOD

Chula Vista

47

GOOD

34

GOOD

34

GOOD

Del Mar

47

GOOD

34

GOOD

34

GOOD

Downtown

47

GOOD

34

GOOD

34

GOOD

El Cajon

42

GOOD

34

GOOD

34

GOOD

Escondido

42

GOOD

34

GOOD

34

GOOD

Otay Mesa

47

GOOD

34

GOOD

34

GOOD

Kearny Mesa

42

GOOD

34

GOOD

34

GOOD

Oceanside

47

GOOD

34

GOOD

34

GOOD

 

City

Forecast Maximum AQI
PM2.5
  OCTOBER 25

OCTOBER 26

OCTOBER 27

Alpine

38

GOOD

33

GOOD

33

GOOD

Chula Vista

50

GOOD

33

GOOD

33

GOOD

Del Mar

53

MODERATE

33

GOOD

33

GOOD

Downtown

55

MODERATE

38

GOOD

38

GOOD

El Cajon

55

MODERATE

38

GOOD

38

GOOD

Escondido

55

MODERATE

38

GOOD

38

GOOD

Otay Mesa

55

MODERATE

38

GOOD

38

GOOD

Kearny Mesa

50

GOOD

33

GOOD

33

GOOD

Oceanside

50

GOOD

38

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.

BR / 1630