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Air Quality Forecast

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The air quality forecast for Saturday, April 25, is for little change in conditions. Air quality levels will be GOOD throughout the day.

The air quality forecast for Sunday, April 26, is for little change in conditions. Air quality levels will be GOOD throughout the day.

The air quality forecast for Monday, April 27, is for less 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

  APRIL 25

APRIL 26

APRIL 27

APRIL 24

Alpine

38

OZONE

47

OZONE

67

OZONE

37

OZONE

Chula Vista

38

OZONE

42

OZONE

42

OZONE

36

OZONE

Del Mar

38

OZONE

42

OZONE

42

OZONE

37

OZONE

Downtown

38

OZONE

42

OZONE

53

PM2.5

38

OZONE

El Cajon

38

OZONE

42

OZONE

51

OZONE

31

OZONE

Escondido

38

OZONE

42

OZONE

51

OZONE

36

OZONE

Otay Mesa

38

OZONE

42

OZONE

55

PM2.5

37

OZONE

Kearny Mesa

38

OZONE

42

OZONE

51

OZONE

38

OZONE

Oceanside

38

OZONE

42

OZONE

53

PM2.5

37

OZONE


POLLUTANT SPECIFIC FORECASTS

City

Forecast Maximum AQI
OZONE

  APRIL 25

APRIL 26

APRIL 27

Alpine

38

GOOD

47

GOOD

67

MODERATE

Chula Vista

38

GOOD

42

GOOD

42

GOOD

Del Mar

38

GOOD

42

GOOD

42

GOOD

Downtown

38

GOOD

42

GOOD

42

GOOD

El Cajon

38

GOOD

42

GOOD

51

MODERATE

Escondido

38

GOOD

42

GOOD

51

MODERATE

Otay Mesa

38

GOOD

42

GOOD

51

MODERATE

Kearny Mesa

38

GOOD

42

GOOD

51

MODERATE

Oceanside

38

GOOD

42

GOOD

47

GOOD

 

City

Forecast Maximum AQI
PM2.5
  APRIL 25

APRIL 26

APRIL 27

Alpine

21

GOOD

21

GOOD

21

GOOD

Chula Vista

21

GOOD

29

GOOD

42

GOOD

Del Mar

21

GOOD

29

GOOD

42

GOOD

Downtown

21

GOOD

33

GOOD

53

MODERATE

El Cajon

21

GOOD

33

GOOD

46

GOOD

Escondido

21

GOOD

33

GOOD

46

GOOD

Otay Mesa

29

GOOD

42

GOOD

55

MODERATE

Kearny Mesa

21

GOOD

33

GOOD

50

GOOD

Oceanside

29

GOOD

38

GOOD

53

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