Air Quality Forecast

The air quality forecast for Friday, August 8, 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 Saturday, August 9, is for little change in 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

FRIDAY, AUGUST 8

SATURDAY, AUGUST 9

Alpine

105

OZONE

103

OZONE

Chula Vista

58

PM2.5

56

PM2.5

Del Mar

56

PM2.5

55

PM2.5

Downtown

58

PM2.5

56

PM2.5

El Cajon

74

OZONE

67

OZONE

Escondido

74

OZONE

67

OZONE

Otay Mesa

64

PM2.5

62

PM2.5

Kearny Mesa

60

PM2.5

56

PM2.5

Oceanside

56

PM2.5

55

PM2.5

San Ysidro

62

PM2.5

60

PM2.5

 

Forecast Pollutant Specific Maximum AQI

FRIDAY, AUGUST 8

CITY

OZONE

PM2.5

Alpine

105

U.S.G.

53

MODERATE

Chula Vista

34

GOOD

58

MODERATE

Del Mar

32

GOOD

56

MODERATE

Downtown

34

GOOD

58

MODERATE

El Cajon

74

MODERATE

60

MODERATE

Escondido

74

MODERATE

60

MODERATE

Otay Mesa

51

MODERATE

64

MODERATE

Kearny Mesa

49

GOOD

60

MODERATE

Oceanside

32

GOOD

56

MODERATE

San Ysidro

35

GOOD

62

MODERATE

         

SATURDAY, AUGUST 9

CITY

OZONE

PM2.5

Alpine

103

U.S.G.

50

GOOD

Chula Vista

35

GOOD

56

MODERATE

Del Mar

34

GOOD

55

MODERATE

Downtown

35

GOOD

56

MODERATE

El Cajon

67

MODERATE

58

MODERATE

Escondido

67

MODERATE

58

MODERATE

Otay Mesa

50

GOOD

62

MODERATE

Kearny Mesa

48

GOOD

56

MODERATE

Oceanside

35

GOOD

55

MODERATE

San Ysidro

36

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.