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Air Quality Forecast

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The air quality forecast for Tuesday,October 21, 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, OCTOBER 21

MONDAY,OCTOBER 20

Alpine

50

OZONE

48

OZONE

Chula Vista

36

OZONE

34

OZONE

Del Mar

38

OZONE

36

OZONE

Downtown

38

PM2.5

33

OZONE

El Cajon

57

PM2.5

56

PM2.5

Escondido

57

PM2.5

56

PM2.5

Otay Mesa

41

OZONE

36

OZONE

Kearny Mesa

44

OZONE

42

OZONE

Oceanside

38

OZONE

36

OZONE


POLLUTANT SPECIFIC FORECASTS

City

Forecast Maximum AQI OZONE

Forecast Maximum AQI PM2.5

TUESDAY, OCTOBER 21 TUESDAY, OCTOBER 21

Alpine

50

GOOD

38

GOOD

Chula Vista

36

GOOD

33

GOOD

Del Mar

38

GOOD

33

GOOD

Downtown

36

GOOD

38

GOOD

El Cajon

42

GOOD

57

MODERATE

Escondido

44

GOOD

57

MODERATE

Otay Mesa

41

GOOD

38

GOOD

Kearny Mesa

44

GOOD

42

GOOD

Oceanside

38

GOOD

33

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.

RD / 1630