Air Quality Forecast

The air quality forecast for Friday, June 27, is for little change in conditions. Air quality levels will be GOOD to MODERATE throughout the day.

The air quality forecast for Saturday, June 28, is for less favorable conditions. Air quality levels will be GOOD to UNHEALTHY FOR SENSITIVE GROUPS throughout the day.

The air quality forecast for Sunday, June 29, is for little change in conditions. Air quality levels will be GOOD to UNHEALTHY FOR SENSITIVE GROUPS throughout the day.

The air quality forecast for Monday, June 30, is for more favorable 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.

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

FRIDAY, JUNE 27

SATURDAY, JUNE 28

SUNDAY, JUNE 29

MONDAY, JUNE 30

Alpine

100

OZONE

108

OZONE

103

OZONE

90

OZONE

Chula Vista

58

PM2.5

60

PM2.5

58

PM2.5

53

PM2.5

Del Mar

50

PM2.5

53

PM2.5

53

PM2.5

50

PM2.5

Downtown

58

PM2.5

60

PM2.5

58

PM2.5

53

PM2.5

El Cajon

58

PM2.5

67

OZONE

64

PM2.5

56

PM2.5

Escondido

58

PM2.5

67

OZONE

64

PM2.5

56

PM2.5

Otay Mesa

68

PM2.5

73

PM2.5

68

PM2.5

62

PM2.5

Kearny Mesa

58

PM2.5

60

PM2.5

58

PM2.5

53

PM2.5

Oceanside

50

PM2.5

53

PM2.5

53

PM2.5

50

PM2.5

San Ysidro

77

PM2.5

81

PM2.5

71

PM2.5

60

PM2.5

 

Forecast Pollutant Specific Maximum AQI

FRIDAY, JUNE 27

CITY

OZONE

PM2.5

Alpine

100

MODERATE

53

MODERATE

Chula Vista

43

GOOD

58

MODERATE

Del Mar

41

GOOD

50

GOOD

Downtown

43

GOOD

58

MODERATE

El Cajon

54

MODERATE

58

MODERATE

Escondido

54

MODERATE

58

MODERATE

Otay Mesa

51

MODERATE

68

MODERATE

Kearny Mesa

47

GOOD

58

MODERATE

Oceanside

41

GOOD

50

GOOD

San Ysidro

44

GOOD

77

MODERATE

         

SATURDAY, JUNE 28

CITY

OZONE

PM2.5

Alpine

108

U.S.G.

55

MODERATE

Chula Vista

44

GOOD

60

MODERATE

Del Mar

42

GOOD

53

MODERATE

Downtown

44

GOOD

60

MODERATE

El Cajon

67

MODERATE

62

MODERATE

Escondido

67

MODERATE

62

MODERATE

Otay Mesa

58

MODERATE

73

MODERATE

Kearny Mesa

49

GOOD

60

MODERATE

Oceanside

42

GOOD

53

MODERATE

San Ysidro

44

GOOD

81

MODERATE

         

SUNDAY, JUNE 29

CITY

OZONE

PM2.5

Alpine

103

U.S.G.

53

MODERATE

Chula Vista

44

GOOD

58

MODERATE

Del Mar

43

GOOD

53

MODERATE

Downtown

44

GOOD

58

MODERATE

El Cajon

61

MODERATE

64

MODERATE

Escondido

61

MODERATE

64

MODERATE

Otay Mesa

61

MODERATE

68

MODERATE

Kearny Mesa

50

GOOD

58

MODERATE

Oceanside

43

GOOD

53

MODERATE

San Ysidro

44

GOOD

71

MODERATE

         

MONDAY, JUNE 30

CITY

OZONE

PM2.5

Alpine

90

MODERATE

44

GOOD

Chula Vista

42

GOOD

53

MODERATE

Del Mar

41

GOOD

50

GOOD

Downtown

42

GOOD

53

MODERATE

El Cajon

50

GOOD

56

MODERATE

Escondido

50

GOOD

56

MODERATE

Otay Mesa

51

MODERATE

62

MODERATE

Kearny Mesa

46

GOOD

53

MODERATE

Oceanside

41

GOOD

50

GOOD

San Ysidro

43

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.