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Air Quality Forecast

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The air quality forecast for Friday, September 4, is for little change in conditions.  Air Quality Levels will be GOOD 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

Pollutant

Measured Maximum AQI

Pollutant

FRIDAY, SEPTEMBER 4

THURSDAY, SEPTEMBER 3

Alpine

48

OZONE

45

OZONE

Chula Vista

38

OZONE

36

OZONE

Del Mar

42

PM2.5

44

PM2.5

Downtown

34

OZONE

33

OZONE

El Cajon

38

OZONE

40

PM2.5

Escondido

38

OZONE

40

PM2.5

Otay Mesa

38

OZONE

40

PM2.5

Kearny Mesa

34

OZONE

34

OZONE

Oceanside

42

PM2.5

44

PM2.5


POLLUTANT SPECIFIC FORECASTS

City

Forecast Maximum AQI OZONE

Forecast Maximum AQI PM2.5

FRIDAY, SEPTEMBER 4

FRIDAY, SEPTEMBER 4

Alpine

48

GOOD

42

GOOD

Chula Vista

38

GOOD

25

GOOD

Del Mar

34

GOOD

42

GOOD

Downtown

34

GOOD

25

GOOD

El Cajon

38

GOOD

38

GOOD

Escondido

38

GOOD

38

GOOD

Otay Mesa

38

GOOD

38

GOOD

Kearny Mesa

34

GOOD

29

GOOD

Oceanside

38

GOOD

42

GOOD

In cases where this page is not updated properly, or to hear the official air pollution forecast, please call our air pollution recording line at (858) 586-2800.  This recording is updated daily Monday through Friday at 4:30 PM.

If you need air quality information, please call (858) 586-2600. If you have an air pollution complaint, or see an air pollution problem, please call (858) 586-2650. Thank you.

BR / 1630 PDT