Air Quality Forecast

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The air quality forecast for Saturday, April 22, is for little change in conditions. Air quality levels will be MODERATE to UNHEALTHY FOR SENSITIVE GROUPS throughout the day.

The air quality forecast for Sunday, April 23, is for little change in conditions. Air quality levels will be GOOD to UNHEALTHY FOR SENSITIVE GROUPS throughout the day.

The air quality forecast for Monday, April 24, is for more favorable conditions. Air quality levels will be GOOD to MODERATE throughout the day.

The Forecasts for Sunday and Monday were issued on Friday and subject to be slightly different due to unexpected changes in meteorological conditions. Please refer to the "Current Ozone & PM2.5 Pollution Map" for up to date information.

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
and Pollutant

Measured Maximum AQI
and Pollutant

  APRIL 22

APRIL 23

APRIL 24

APRIL 21

Alpine

150

OZONE

115

OZONE

67

OZONE

136

OZONE

Chula Vista

54

OZONE

46

OZONE

39

OZONE

50

OZONE

Del Mar

84

OZONE

61

OZONE

44

OZONE

58

OZONE

Downtown

57

PM2.5

53

PM2.5

39

OZONE

55

PM2.5

El Cajon

143

OZONE

100

OZONE

61

OZONE

129

OZONE

Escondido

143

OZONE

100

OZONE

61

OZONE

129

OZONE

Otay Mesa

115

OZONE

67

OZONE

57

PM2.5

104

OZONE

Kearny Mesa

132

OZONE

100

OZONE

54

OZONE

118

OZONE

Oceanside

84

OZONE

61

OZONE

44

OZONE

58

OZONE

 


POLLUTANT SPECIFIC FORECASTS

City

Forecast Maximum AQI
OZONE

  APRIL 22

APRIL 23

APRIL 24

Alpine

150

U.S.G.

115

U.S.G.

67

MODERATE

Chula Vista

54

MODERATE

46

GOOD

39

GOOD

Del Mar

84

MODERATE

61

MODERATE

44

GOOD

Downtown

54

MODERATE

46

GOOD

39

GOOD

El Cajon

143

U.S.G.

100

MODERATE

61

MODERATE

Escondido

143

U.S.G.

100

MODERATE

61

MODERATE

Otay Mesa

115

U.S.G.

67

MODERATE

51

MODERATE

Kearny Mesa

132

U.S.G.

100

MODERATE

54

MODERATE

Oceanside

84

MODERATE

61

MODERATE

44

GOOD

 

City

Forecast Maximum AQI
PM2.5
  APRIL 22

APRIL 23

APRIL 24

Alpine

42

GOOD

38

GOOD

25

GOOD

Chula Vista

53

MODERATE

46

GOOD

33

GOOD

Del Mar

57

MODERATE

53

MODERATE

38

GOOD

Downtown

57

MODERATE

53

MODERATE

38

GOOD

El Cajon

50

GOOD

46

GOOD

42

GOOD

Escondido

50

GOOD

46

GOOD

42

GOOD

Otay Mesa

63

MODERATE

57

MODERATE

57

MODERATE

Kearny Mesa

53

MODERATE

42

GOOD

33

GOOD

Oceanside

57

MODERATE

53

MODERATE

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.

JD / 1630 PST