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Air Quality Forecast

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The air quality forecast for Saturday, August 30, is for little change in conditions. Air quality levels will be GOOD to MODERATE throughout the day.

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

The air quality forecast for Monday, September 1, is for more favorable 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

  AUGUST 30

AUGUST 31

SEPTEMBER 1

AUGUST 29

Alpine

90

OZONE

77

OZONE

51

OZONE

80

OZONE

Chula Vista

46

PM2.5

46

PM2.5

38

OZONE

43

PM2.5

Del Mar

50

PM2.5

50

PM2.5

38

OZONE

52

PM2.5

Downtown

53

PM2.5

53

PM2.5

42

PM2.5

50

PM2.5

El Cajon

58

OZONE

55

PM2.5

46

PM2.5

54

PM2.5

Escondido

58

OZONE

55

PM2.5

46

PM2.5

54

PM2.5

Otay Mesa

53

PM2.5

53

PM2.5

42

PM2.5

50

PM2.5

Kearny Mesa

46

PM2.5

46

PM2.5

38

OZONE

43

PM2.5

Oceanside

55

PM2.5

55

PM2.5

42

PM2.5

53

PM2.5


POLLUTANT SPECIFIC FORECASTS

City

Forecast Maximum AQI
OZONE

  AUGUST 30

AUGUST 31

SEPTEMBER 1

Alpine

90

MODERATE

77

MODERATE

51

MODERATE

Chula Vista

38

GOOD

38

GOOD

38

GOOD

Del Mar

38

GOOD

38

GOOD

38

GOOD

Downtown

38

GOOD

38

GOOD

38

GOOD

El Cajon

58

MODERATE

47

GOOD

38

GOOD

Escondido

58

MODERATE

47

GOOD

38

GOOD

Otay Mesa

34

GOOD

34

GOOD

30

GOOD

Kearny Mesa

44

GOOD

38

GOOD

38

GOOD

Oceanside

34

GOOD

34

GOOD

34

GOOD

 

City

Forecast Maximum AQI
PM2.5
  AUGUST 30

AUGUST 31

SEPTEMBER 1

Alpine

21

GOOD

21

GOOD

21

GOOD

Chula Vista

46

GOOD

46

GOOD

38

GOOD

Del Mar

50

GOOD

50

GOOD

38

GOOD

Downtown

53

MODERATE

53

MODERATE

42

GOOD

El Cajon

55

MODERATE

55

MODERATE

46

GOOD

Escondido

55

MODERATE

55

MODERATE

46

GOOD

Otay Mesa

53

MODERATE

53

MODERATE

42

GOOD

Kearny Mesa

46

GOOD

46

GOOD

33

GOOD

Oceanside

55

MODERATE

55

MODERATE

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.

BR / 1630