Air Quality Forecast

The air quality forecast for Friday, December 3 is for little change in conditions. Air quality levels will be GOOD to MODERATE throughout the day.

The air quality forecast for Saturday, December 4 is for little change in conditions. Air quality levels will be GOOD to MODERATE throughout the day.

The air quality forecast for Sunday, December 5 is for little change in conditions. Air quality levels will be GOOD to MODERATE throughout the day.

The air quality forecast for Monday, December 6 is for little change in conditions. Air quality levels will be GOOD to MODERATE throughout the day.

The Forecast for Sunday and Monday was 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
 

DECEMBER 3

DECEMBER 4

DECEMBER 5

DECEMBER 6

Alpine
46

OZONE
44

OZONE
46

OZONE
48

OZONE

Chula Vista
57

PM2.5
53

PM2.5
50

PM2.5
55

PM2.5

Del Mar
50

PM2.5
46

PM2.5
42

OZONE
50

PM2.5

Downtown
61

PM2.5
55

PM2.5
53

PM2.5
59

PM2.5

El Cajon
63

PM2.5
63

PM2.5
55

PM2.5
57

PM2.5

Escondido
63

PM2.5
63

PM2.5
55

PM2.5
57

PM2.5

Otay Mesa
66

PM2.5
55

PM2.5
53

PM2.5
61

PM2.5

Kearny Mesa
57

PM2.5
53

PM2.5
50

PM2.5
55

PM2.5

Oceanside
50

PM2.5
46

PM2.5
42

OZONE
50

PM2.5



POLLUTANT SPECIFIC FORECASTS

City

Forecast Maximum AQI OZONE

Forecast Maximum AQI PM2.5

 

 FRIDAY, DECEMBER 3 FRIDAY, DECEMBER 3

Alpine

46

GOOD
29

GOOD

Chula Vista

39

GOOD

57

MODERATE

Del Mar

40

GOOD

50

GOOD

Downtown

39

GOOD

61

MODERATE

El Cajon

42

GOOD

63

MODERATE

Escondido

42

GOOD

63

MODERATE

Otay Mesa

37

GOOD

66

MODERATE

Kearny Mesa

40

GOOD

57

MODERATE

Oceanside

40

GOOD

50

GOOD

 

 

City

Forecast Maximum AQI OZONE

Forecast Maximum AQI PM2.5

 

 SATURDAY, DECEMBER 4 SATURDAY, DECEMBER 4

Alpine
44

GOOD

 29

GOOD

Chula Vista

39

GOOD

 53

MODERATE

Del Mar

38

GOOD

 46

GOOD

Downtown

40

GOOD

 55

MODERATE

El Cajon
39

GOOD

63

MODERATE

Escondido

39

GOOD

63

MODERATE

Otay Mesa

37

GOOD

55

MODERATE

Kearny Mesa

41

GOOD

 53

MODERATE

Oceanside

38

GOOD

 46

GOOD

 

City

Forecast Maximum AQI OZONE

Forecast Maximum AQI PM2.5

 

 SUNDAY, DECEMBER 5 SUNDAY, DECEMBER 5

Alpine

46

GOOD

25

GOOD

Chula Vista
41

GOOD

50

GOOD

Del Mar

42

GOOD

42

GOOD

Downtown

41

GOOD

53

MODERATE

El Cajon

44

GOOD

55

MODERATE

Escondido

44

GOOD

55

MODERATE

Otay Mesa

40

GOOD

53

MODERATE

Kearny Mesa

46

GOOD

50

GOOD

Oceanside

42

GOOD

42

GOOD

 

City

Forecast Maximum AQI OZONE

Forecast Maximum AQI PM2.5

 

 MONDAY, DECEMBER 6 MONDAY, DECEMBER 6

Alpine

48

GOOD

33

GOOD

Chula Vista
40

GOOD

55

MODERATE

Del Mar

41

GOOD

50

GOOD

Downtown

40

GOOD

59

MODERATE

El Cajon

44

GOOD

57

MODERATE

Escondido

44

GOOD

57

MODERATE

Otay Mesa

39

GOOD

61

MODERATE

Kearny Mesa

44

GOOD

55

MODERATE

Oceanside

41

GOOD

50

GOOD

 

 

In cases where this page is not updated properly, or to hear the air pollution forecast, please call our air pollution recording line at (858) 586-2800. 

If you need air quality information, please call (858) 586-2769. If you have an air pollution complaint, or see an air pollution problem, please call (858) 586-2650. Thank you.

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