Air Quality Forecast

The air quality forecast for Thursday, August 28, is for little change in conditions. Air quality levels will be GOOD to MODERATE throughout the day.

The air quality forecast for Friday, August 29, is for little change in conditions. Air quality levels will be GOOD  to MODERATE throughout the day.

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.

 

AQI Values

Levels of 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

 

Forecast Daily Maximum AQI

CITY

THURSDAY, AUGUST 28

FRIDAY, AUGUST 29

Alpine

37

OZONE

51

OZONE

Chula Vista

56

PM2.5

55

PM2.5

Del Mar

56

PM2.5

55

PM2.5

Downtown

58

PM2.5

55

PM2.5

El Cajon

53

PM2.5

50

PM2.5

Escondido

53

PM2.5

50

PM2.5

Otay Mesa

68

PM2.5

60

PM2.5

Kearny Mesa

58

PM2.5

53

PM2.5

Oceanside

56

PM2.5

50

PM2.5

San Ysidro

58

PM2.5

55

PM2.5

 

Forecast Pollutant Specific Maximum AQI

THURSDAY, AUGUST 28

CITY

OZONE

PM2.5

Alpine

37

GOOD

33

GOOD

Chula Vista

28

GOOD

56

MODERATE

Del Mar

28

GOOD

56

MODERATE

Downtown

26

GOOD

58

MODERATE

El Cajon

30

GOOD

53

MODERATE

Escondido

30

GOOD

53

MODERATE

Otay Mesa

30

GOOD

68

MODERATE

Kearny Mesa

30

GOOD

58

MODERATE

Oceanside

28

GOOD

56

MODERATE

San Ysidro

30

GOOD

58

MODERATE

         

FRIDAY, AUGUST 29

CITY

OZONE

PM2.5

Alpine

51

MODERATE

44

GOOD

Chula Vista

30

GOOD

55

MODERATE

Del Mar

29

GOOD

55

MODERATE

Downtown

30

GOOD

55

MODERATE

El Cajon

39

GOOD

50

GOOD

Escondido

39

GOOD

50

GOOD

Otay Mesa

38

GOOD

60

MODERATE

Kearny Mesa

38

GOOD

53

MODERATE

Oceanside

29

GOOD

50

GOOD

San Ysidro

34

GOOD

55

MODERATE

         

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.