Air Quality Forecast

The air quality forecast for Tuesday, September 28 is for little change in conditions. Air quality levels will be GOOD throughout the day.

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

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

 

TUESDAY, SEPTEMBER 28 WEDNESDAY, SEPTEMBER 29

Alpine

46
OZONE
46
OZONE

Chula Vista

34
OZONE
38
OZONE

Del Mar

34

OZONE

37

OZONE

Downtown

35
OZONE
46
PM2.5

El Cajon

34
OZONE
50
PM2.5

Escondido

34

OZONE

50

PM2.5

Otay Mesa

31
OZONE
53
PM2.5

Kearny Mesa

35
OZONE
39
OZONE

Oceanside

34

OZONE

37

OZONE


POLLUTANT SPECIFIC FORECASTS

City

Forecast Maximum AQI OZONE

Forecast Maximum AQI PM2.5

 

TUESDAY, SEPTEMBER 28 TUESDAY, SEPTEMBER 28

Alpine

46

GOOD

21

GOOD

Chula Vista

34

GOOD

25

GOOD

Del Mar

34

GOOD

25

GOOD

Downtown

35

GOOD

21

GOOD

El Cajon

34

GOOD

17

GOOD

Escondido

34

GOOD

17

GOOD

Otay Mesa

31

GOOD

17

GOOD

Kearny Mesa

35

GOOD

21

GOOD

Oceanside

34

GOOD

25

GOOD

 

City

Forecast Maximum AQI OZONE

Forecast Maximum AQI PM2.5

 

WEDNESDAY, SEPTEMBER 29 WEDNESDAY, SEPTEMBER 29

Alpine

46

GOOD

25

GOOD

Chula Vista

38

GOOD

38

GOOD

Del Mar

37

GOOD

33

GOOD

Downtown

39

GOOD

46

GOOD

El Cajon

42

GOOD

50

GOOD

Escondido

42

GOOD

50

GOOD

Otay Mesa

40

GOOD

53

MODERATE

Kearny Mesa

39

GOOD

38

GOOD

Oceanside

37

GOOD

33

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