Air Quality Forecast

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The air quality forecast for Tuesday, September 26, 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

Pollutant

Measured Maximum AQI

Pollutant

TUESDAY, SEPTEMBER 26

MONDAY, SEPTEMBER 25

Alpine

61

OZONE

51

OZONE

Chula Vista

50

OZONE

48

OZONE

Del Mar

50

OZONE

45

OZONE

Downtown

50

OZONE

52

PM2.5

El Cajon

50

OZONE

47

OZONE

Escondido

50

OZONE

47

OZONE

Otay Mesa

50

OZONE

52

PM2.5

Kearny Mesa

50

OZONE

45

OZONE

Oceanside

50

OZONE

45

OZONE


POLLUTANT SPECIFIC FORECASTS

City

Forecast Maximum AQI OZONE

Forecast Maximum AQI PM2.5

TUESDAY, SEPTEMBER 26

TUESDAY, SEPTEMBER 26

Alpine

61

MODERATE

13

GOOD

Chula Vista

50

GOOD

33

GOOD

Del Mar

50

GOOD

38

GOOD

Downtown

50

GOOD

46

GOOD

El Cajon

50

GOOD

33

GOOD

Escondido

50

GOOD

33

GOOD

Otay Mesa

50

GOOD

46

GOOD

Kearny Mesa

50

GOOD

42

GOOD

Oceanside

50

GOOD

38

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.

AC / 1630 PDT