Air Quality Forecast

The air quality forecast for Friday, July 30 is for little change in conditions. Air quality levels will be GOOD to MODERATE throughout the day.

The air quality forecast for Saturday, July 31 is for little change in conditions. Air quality levels will be GOOD to MODERATE throughout the day.

The air quality forecast for Sunday, August 1 is for less favorable conditions. Air quality levels will be GOOD to MODERATE throughout the day.

The air quality forecast for Monday, August 2 is for less favorable conditions. Air quality levels will be GOOD to UNHEALTHY FOR SENSITIVE GROUPS 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.

 

Air Quality Index (AQI) Values

Levels of Health 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

 

City

Forecast Maximum AQI
and Pollutant

 

JULY 30

JULY 31

AUGUST 1

AUGUST 2

Alpine

67

OZONE

67

OZONE

87

OZONE

104

OZONE

Chula Vista

38

OZONE

35

OZONE

38

OZONE

40

OZONE

Del Mar

37

OZONE

34

OZONE

37

OZONE

38

OZONE

Downtown

38

OZONE

35

OZONE

37

OZONE

41

OZONE

El Cajon

51

OZONE

51

OZONE

67

OZONE

80
OZONE

Escondido

51

OZONE

51

OZONE

67

OZONE

80

OZONE

Otay Mesa

46

PM2.5

42

PM2.5

40

OZONE

50

PM2.5

Kearny Mesa

44

OZONE

38

OZONE

41

OZONE

44

OZONE

Oceanside

37

OZONE

34

OZONE

37

OZONE

38

OZONE



POLLUTANT SPECIFIC FORECASTS

City

Forecast Maximum AQI OZONE

Forecast Maximum AQI PM2.5

 

FRIDAY, JULY 30 FRIDAY, JULY 30

Alpine

67

MODERATE

29

GOOD

Chula Vista

38

GOOD

25

GOOD

Del Mar

37

GOOD

29

GOOD

Downtown

38

GOOD

29

GOOD

El Cajon

51

MODERATE

38

GOOD

Escondido

51

MODERATE

38

GOOD

Otay Mesa

42

GOOD

46

GOOD

Kearny Mesa

44

GOOD

25

GOOD

Oceanside

37

GOOD

29

GOOD

 

 

City

Forecast Maximum AQI OZONE

Forecast Maximum AQI PM2.5

 

SATURDAY, JULY 31 SATURDAY, JULY 31

Alpine

67

MODERATE

25

GOOD

Chula Vista

35

GOOD

29

GOOD

Del Mar

34

GOOD

33

GOOD

Downtown

35

GOOD

29

GOOD

El Cajon

51

MODERATE

38

GOOD

Escondido

51

MODERATE

38

GOOD

Otay Mesa

37

GOOD

42

GOOD

Kearny Mesa

38

GOOD

29

GOOD

Oceanside

34

GOOD

33

GOOD

 

City

Forecast Maximum AQI OZONE

Forecast Maximum AQI PM2.5

 

SUNDAY, AUGUST 1 SUNDAY, AUGUST 1

Alpine

87

MODERATE

25

GOOD

Chula Vista

38

GOOD

25

GOOD

Del Mar

37

GOOD

29

GOOD

Downtown

37

GOOD

25

GOOD

El Cajon

67

MODERATE

33

GOOD

Escondido

67

MODERATE

33

GOOD

Otay Mesa

40

GOOD

38

GOOD

Kearny Mesa

41

GOOD

25

GOOD

Oceanside

37

GOOD

29

GOOD

 

City

Forecast Maximum AQI OZONE

Forecast Maximum AQI PM2.5

 

MONDAY, AUGUST 2 MONDAY, AUGUST 2

Alpine

104

U.S.G.

21

GOOD

Chula Vista

40

GOOD

29

GOOD

Del Mar

38

GOOD

25

GOOD

Downtown

41

GOOD

29

GOOD

El Cajon

80

MODERATE

38

GOOD

Escondido

80

MODERATE

38

GOOD

Otay Mesa

42

GOOD

50

GOOD

Kearny Mesa

44

GOOD

29

GOOD

Oceanside

38

GOOD

25

GOOD

 

 

 

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.

JD