Air Quality Forecast

The air quality forecast for Monday, May 19, is for less favorable conditions. Air quality levels will be GOOD to MODERATE throughout the day.

The air quality forecast for Tuesday, May 20, 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

MONDAY, MAY 19

TUESDAY, MAY 20

Alpine

50

OZONE

67

OZONE

Chula Vista

43

OZONE

53

PM2.5

Del Mar

41

OZONE

50

PM2.5

Downtown

43

OZONE

53

PM2.5

El Cajon

50

PM2.5

55

PM2.5

Escondido

50

PM2.5

55

PM2.5

Otay Mesa

53

PM2.5

64

PM2.5

Kearny Mesa

44

OZONE

53

PM2.5

Oceanside

41

OZONE

53

PM2.5

San Ysidro

50

PM2.5

60

PM2.5

 

Forecast Pollutant Specific Maximum AQI

MONDAY, MAY 19

CITY

OZONE

PM2.5

Alpine

50

GOOD

33

GOOD

Chula Vista

43

GOOD

39

GOOD

Del Mar

41

GOOD

33

GOOD

Downtown

43

GOOD

39

GOOD

El Cajon

47

GOOD

50

GOOD

Escondido

47

GOOD

50

GOOD

Otay Mesa

45

GOOD

53

MODERATE

Kearny Mesa

44

GOOD

44

GOOD

Oceanside

41

GOOD

33

GOOD

San Ysidro

42

GOOD

50

GOOD

         

TUESDAY, MAY 20

CITY

OZONE

PM2.5

Alpine

67

MODERATE

39

GOOD

Chula Vista

46

GOOD

53

MODERATE

Del Mar

44

GOOD

50

GOOD

Downtown

44

GOOD

53

MODERATE

El Cajon

54

MODERATE

55

MODERATE

Escondido

54

MODERATE

55

MODERATE

Otay Mesa

51

MODERATE

64

MODERATE

Kearny Mesa

50

GOOD

53

MODERATE

Oceanside

43

GOOD

53

MODERATE

San Ysidro

42

GOOD

60

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.