Air Quality Forecast

The air quality forecast for Thursday, September 24  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 a 50

Good

Green

51 a 100

Moderate

Yellow

101 a 150

Unhealthy for Sensitive Groups (U.S.G.)

Orange

151 a 200

Unhealthy

Red

201 a 300

Very Unhealthy

Purple

301 a 500

Hazardous

Maroon

 

City

Forecast Maximum AQI

Pollutant

Measured Maximum AQI

Pollutant

 

THURSDAY, SEPTEMBER 24 WEDNESDAY, SEPTEMBER 23

Alpine

46

OZONE

37

OZONE

Chula Vista

50

PM2.5

46

OZONE

Del Mar

53

PM2.5

47

PM2.5

Downtown

53

PM2.5

48

PM2.5

El Cajon

50

PM2.5

45

PM2.5

Escondido

50

PM2.5

45

PM2.5

Otay Mesa

68

PM2.5

66

PM2.5

Kearny Mesa

46

PM2.5

42

PM2.5

Oceanside

53

PM2.5

47

PM2.5


POLLUTANT SPECIFIC FORECASTS

City

Forecast Maximum AQI OZONE

Forecast Maximum AQI PM2.5

 

THURSDAY, SEPTEMBER 24 THURSDAY, SEPTEMBER 24

Alpine

46

GOOD

29

GOOD

Chula Vista

44

GOOD

50

GOOD

Del Mar

41

GOOD

53

MODERATE

Downtown

44

GOOD

53

MODERATE

El Cajon

44

GOOD

50

GOOD

Escondido

44

GOOD

50

GOOD

Otay Mesa

46

GOOD

68

MODERATE

Kearny Mesa

40

GOOD

46

GOOD

Oceanside

41

GOOD

53

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.

JD / 1630 PDT