Air Quality Forecast

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The air quality forecast for Tuesday, August 21, is for little change in conditions.  Air quality levels will be 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, AUGUST 21

MONDAY, AUGUST 20

Alpine

93

OZONE

84

OZONE

Chula Vista

59

PM2.5

57

PM2.5

Del Mar

59

PM2.5

57

PM2.5

Downtown

59

PM2.5

57

PM2.5

El Cajon

68

PM2.5

66

PM2.5

Escondido

70

PM2.5

68

PM2.5

Otay Mesa

70

PM2.5

67

PM2.5

Kearny Mesa

59

PM2.5

57

PM2.5

Oceanside

59

PM2.5

57

PM2.5


POLLUTANT SPECIFIC FORECASTS

City

Forecast Maximum AQI OZONE

Forecast Maximum AQI PM2.5

TUESDAY, AUGUST 21

TUESDAY, AUGUST 21

Alpine

51

MODERATE

63

MODERATE

Chula Vista

37

GOOD

59

MODERATE

Del Mar

32

GOOD

59

MODERATE

Downtown

37

GOOD

59

MODERATE

El Cajon

51

MODERATE

68

MODERATE

Escondido

51

MODERATE

70

MODERATE

Otay Mesa

46

GOOD

70

MODERATE

Kearny Mesa

46

GOOD

59

MODERATE

Oceanside

32

GOOD

59

MODERATE

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