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Air Quality Forecast

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The air quality forecast for Wednesday, September 17, is for less favorable 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

WEDNESDAY, SEPTEMBER 17

TUESDAY, SEPTEMBER 16

Alpine

80

OZONE

37

OZONE

Chula Vista

50

PM2.5

49

PM2.5

Del Mar

55

PM2.5

55

PM2.5

Downtown

55

PM2.5

55

PM2.5

El Cajon

61

OZONE

53

PM2.5

Escondido

61

OZONE

53

PM2.5

Otay Mesa

55

PM2.5

55

PM2.5

Kearny Mesa

67

OZONE

61

OZONE

Oceanside

61

OZONE

55

PM2.5


POLLUTANT SPECIFIC FORECASTS

City

Forecast Maximum AQI OZONE

Forecast Maximum AQI PM2.5

WEDNESDAY, SEPTEMBER 17 WEDNESDAY, SEPTEMBER 17

Alpine

80

MODERATE

29

GOOD

Chula Vista

47

GOOD

50

GOOD

Del Mar

42

GOOD

55

MODERATE

Downtown

42

GOOD

55

MODERATE

El Cajon

61

MODERATE

55

MODERATE

Escondido

61

MODERATE

55

MODERATE

Otay Mesa

42

GOOD

55

MODERATE

Kearny Mesa

67

MODERATE

50

GOOD

Oceanside

61

MODERATE

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