Skip Navigation
County of San Diego

Air Quality Forecasts

The air quality forecast for Saturday, May 10 is for little change in 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 Pollution Map" for up to date information.

The air quality forecast for Sunday, May 11 is for little change in conditions. Air quality levels will be Good to Moderate throughout the day.

The air quality forecast for Monday, May 12 is for little change in conditions. Air quality levels will be Good to Moderate throughout the day.

Air quality reports use the Air Quality Index, which represents the higher of three pollutants - PM2.5, PM10 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) or less than 10 microns (PM10), 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

Orange

151 to 200

Unhealthy

Red

201 to 300

Very Unhealthy

Purple

301 to 500

Hazardous

Maroon


Forecast Maximum AQI
Level

MAY 9

MAY 10

MAY 11

MAY 12

Alpine

52

PM2.5

71

OZONE

80

OZONE

54

PM2.5

Chula Vista

41

OZONE

47

OZONE

47

OZONE

44

OZONE

Del Mar

48

OZONE

47

OZONE

47

OZONE

44

OZONE

Downtown

41

OZONE

42

OZONE

42

OZONE

40

OZONE

El Cajon

41

OZONE

52

PM2.5

61

OZONE

45

PM2.5

Escondido

45

PM2.5

51

OZONE

58

OZONE

42

PM2.5

Otay Mesa

37

OZONE

42

OZONE

42

OZONE

41

OZONE

Kearny Mesa

43

OZONE

47

OZONE

47

OZONE

43

OZONE

Oceanside

45

OZONE

47

OZONE

47

OZONE

40

OZONE

 U.S.G. = Unhealthy For Sensitive Groups


POLLUTANT SPECIFIC FORECASTS


Forecast Maximum AQI
Level for:

OZONE

MAY 10

MAY 11

MAY 12

Alpine

71

MODERATE

80

MODERATE

50

GOOD

Chula Vista

47

GOOD

47

GOOD

44

GOOD

Del Mar

47

GOOD

47

GOOD

44

GOOD

Downtown

42

GOOD

42

GOOD

40

GOOD

El Cajon

51

MODERATE

61

MODERATE

42

GOOD

Escondido

51

MODERATE

58

MODERATE

41

GOOD

Otay Mesa

42

GOOD

42

GOOD

41

GOOD

Kearny Mesa

47

GOOD

47

GOOD

43

GOOD

Oceanside

47

GOOD

47

GOOD

40

GOOD


Forecast Maximum AQI
Level for:

PM2.5

MAY 10

MAY 11

MAY 12

Alpine

58

MODERATE

60

MODERATE

54

MODERATE

Chula Vista

29

GOOD

32

GOOD

23

GOOD

Del Mar

29

GOOD

32

GOOD

23

GOOD

Downtown

36

GOOD

39

GOOD

26

GOOD

El Cajon

52

MODERATE

54

MODERATE

45

GOOD

Escondido

49

GOOD

52

MODERATE

42

GOOD

Otay Mesa

29

GOOD

32

GOOD

23

GOOD

Kearny Mesa

29

GOOD

32

GOOD

23

GOOD

Oceanside

29

GOOD

32

GOOD

23

GOOD

If you need air quality information, please call (858) 586-2707 during regular working hours. If you have an air pollution complaint, or see an air pollution problem, please call (858) 586-2650. Thank you.

In cases where this web page is not updated properly, or to hear the official air pollution forecast, please call our air pollution forecast recording line at: (858) 586-2800.  This recording is updated daily at 4:30 PM.

WCR / 1630 PDT