Air Quality Forecast

The air quality forecast for Wednesday, May 18 is for little change in conditions. Air quality levels will be GOOD to MODERATE throughout the day.

The air quality forecast for Thursday, May 19 is for little change in 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 and Pollutant

 

WEDNESDAY, MAY 18 THURSDAY, MAY 19

Alpine

67
OZONE
67
OZONE

Chula Vista

42
PM2.5
41
OZONE

Del Mar

40
OZONE
42
OZONE

Downtown

50
PM2.5
42
PM2.5

El Cajon

55
PM2.5
53
PM2.5

Escondido

57
PM2.5
55
PM2.5

Otay Mesa

55
PM2.5
55
PM2.5

Kearny Mesa

42
OZONE
42
OZONE

Oceanside

40
OZONE
42
OZONE


POLLUTANT SPECIFIC FORECASTS

City

Forecast Maximum AQI OZONE

Forecast Maximum AQI PM2.5

 

WEDNESDAY, MAY 18 WEDNESDAY, MAY 18

Alpine

67

MODERATE

29

GOOD

Chula Vista

39

GOOD

42

GOOD

Del Mar

40

GOOD

33

GOOD

Downtown

38

GOOD

50

GOOD

El Cajon

49

GOOD

55

MODERATE

Escondido

49

GOOD

57

MODERATE

Otay Mesa

41

GOOD

55

MODERATE

Kearny Mesa

42

GOOD

42

GOOD

Oceanside

40

GOOD

33

GOOD

 

City

Forecast Maximum AQI OZONE

Forecast Maximum AQI PM2.5

 

THURSDAY, MAY 19 THURSDAY, MAY 19

Alpine

67

MODERATE

25

GOOD

Chula Vista

41

GOOD

38

GOOD

Del Mar

42

GOOD

33

GOOD

Downtown

40

GOOD

42

GOOD

El Cajon

48

GOOD

53

MODERATE

Escondido

48

GOOD

55

MODERATE

Otay Mesa

40

GOOD

55

MODERATE

Kearny Mesa

42

GOOD

38

GOOD

Oceanside

42

GOOD

33

GOOD

 

In cases where this page is not updated properly, or to hear the air pollution forecast, please call our air pollution recording line at (858) 586-2800. 

If you need air quality information, please call (858) 586-2769. If you have an air pollution complaint, or see an air pollution problem, please call (858) 586-2650. Thank you.