Air Quality Forecast

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The air quality forecast for Thursday, June 21, is for less favorable conditions.  Air quality levels will be GOOD to UNHEALTHY for SENSITIVE GROUPS 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

  THURSDAY, JUNE 21

WEDNESDAY, JUNE 20

Alpine

101

OZONE

74

OZONE

Chula Vista

42

OZONE

44

OZONE

Del Mar

42

OZONE

41

OZONE

Downtown

42

OZONE

44

OZONE

El Cajon

61

OZONE

49

OZONE

Escondido

61

OZONE

49

OZONE

Otay Mesa

53

PM2.5

46

OZONE

Kearny Mesa

48

OZONE

45

OZONE

Oceanside

42

OZONE

41

OZONE


POLLUTANT SPECIFIC FORECASTS

City

Forecast Maximum AQI OZONE

Forecast Maximum AQI PM2.5

THURSDAY, JUNE 21

THURSDAY, JUNE 21

Alpine

101

U.S.G.

38

GOOD

Chula Vista

42

GOOD

42

GOOD

Del Mar

42

GOOD

42

GOOD

Downtown

42

GOOD

42

GOOD

El Cajon

61

MODERATE

38

GOOD

Escondido

61

MODERATE

38

GOOD

Otay Mesa

49

GOOD

53

MODERATE

Kearny Mesa

48

GOOD

42

GOOD

Oceanside

42

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.

JD / 1630 PDT