Air Quality Forecast

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The air quality forecast for Saturday, April 21, is for little change in conditions. Air quality levels will be GOOD to MODERATE throughout the day.

The air quality forecast for Sunday, April 22, is for little change in conditions. Air quality levels will be GOOD to MODERATE throughout the day.

The air quality forecast for Monday, April 23, is for little change in conditions. Air quality levels will be GOOD to MODERATE throughout the day.

The Forecasts for Sunday and Monday were 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 21

APRIL 22

APRIL 23

APRIL 20

Alpine

67

OZONE

67

OZONE

61

OZONE

58

OZONE

Chula Vista

43

OZONE

44

OZONE

42

OZONE

41

OZONE

Del Mar

46

OZONE

46

OZONE

44

OZONE

44

OZONE

Downtown

43

OZONE

44

OZONE

42

OZONE

41

OZONE

El Cajon

58

OZONE

61

OZONE

53

PM2.5

51

OZONE

Escondido

58

OZONE

61

OZONE

53

PM2.5

51

OZONE

Otay Mesa

49

OZONE

53

PM2.5

55

PM2.5

47

OZONE

Kearny Mesa

49

OZONE

50

OZONE

46

OZONE

47

OZONE

Oceanside

46

OZONE

46

OZONE

44

OZONE

44

OZONE

 


POLLUTANT SPECIFIC FORECASTS

City

Forecast Maximum AQI
OZONE

  APRIL 21

APRIL 22

APRIL 23

Alpine

67

MODERATE

67

MODERATE

61

MODERATE

Chula Vista

43

GOOD

44

GOOD

42

GOOD

Del Mar

46

GOOD

46

GOOD

44

GOOD

Downtown

43

GOOD

44

GOOD

42

GOOD

El Cajon

58

MODERATE

61

MODERATE

51

MODERATE

Escondido

58

MODERATE

61

MODERATE

51

MODERATE

Otay Mesa

49

GOOD

50

GOOD

46

GOOD

Kearny Mesa

49

GOOD

50

GOOD

46

GOOD

Oceanside

46

GOOD

46

GOOD

44

GOOD

 

City

Forecast Maximum AQI
PM2.5
  APRIL 21

APRIL 22

APRIL 23

Alpine

17

GOOD

21

GOOD

25

GOOD

Chula Vista

25

GOOD

33

GOOD

38

GOOD

Del Mar

25

GOOD

33

GOOD

38

GOOD

Downtown

25

GOOD

33

GOOD

38

GOOD

El Cajon

33

GOOD

46

GOOD

53

MODERATE

Escondido

33

GOOD

46

GOOD

53

MODERATE

Otay Mesa

42

GOOD

53

MODERATE

55

MODERATE

Kearny Mesa

25

GOOD

33

GOOD

38

GOOD

Oceanside

25

GOOD

33

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.

JD / 1630 PDT