Air Quality Forecast

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

The air quality forecast for Thursday, October 30, is for less favorable conditions. Air quality levels will be GOOD to UNHEALTHY FOR SENSITIVE GROUPS  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

WEDNESDAY, OCTOBER 29

THURSDAY, OCTOBER 30

Alpine

80

OZONE

103

OZONE

Chula Vista

48

OZONE

53

PM2.5

Del Mar

53

PM2.5

56

PM2.5

Downtown

64

PM2.5

66

PM2.5

El Cajon

67

OZONE

74

OZONE

Escondido

60

PM2.5

67

OZONE

Otay Mesa

67

OZONE

74

OZONE

Kearny Mesa

74

OZONE

80

OZONE

Oceanside

53

PM2.5

50

PM2.5

San Ysidro

82

PM2.5

71

PM2.5

 

Forecast Pollutant Specific Maximum AQI

WEDNESDAY, OCTOBER 29

CITY

OZONE

PM2.5

Alpine

80

MODERATE

17

GOOD

Chula Vista

48

GOOD

39

GOOD

Del Mar

46

GOOD

53

MODERATE

Downtown

45

GOOD

64

MODERATE

El Cajon

67

MODERATE

60

MODERATE

Escondido

54

MODERATE

60

MODERATE

Otay Mesa

67

MODERATE

53

MODERATE

Kearny Mesa

74

MODERATE

50

GOOD

Oceanside

46

GOOD

53

MODERATE

San Ysidro

46

GOOD

82

MODERATE

         

THURSDAY, OCTOBER 30

CITY

OZONE

PM2.5

Alpine

103

U.S.G.

33

GOOD

Chula Vista

50

GOOD

53

MODERATE

Del Mar

48

GOOD

56

MODERATE

Downtown

47

GOOD

66

MODERATE

El Cajon

74

MODERATE

62

MODERATE

Escondido

67

MODERATE

62

MODERATE

Otay Mesa

74

MODERATE

66

MODERATE

Kearny Mesa

80

MODERATE

53

MODERATE

Oceanside

48

GOOD

50

GOOD

San Ysidro

48

GOOD

71

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.