San Diego County
Air
Pollution
Control District
-
Air Quality Forecast -
AQ Forecast by Site -
About
Air Quality Forecast
The air quality forecast for Thursday, September 18, is for little change in conditions. Air quality levels will be GOOD to MODERATE throughout the day.
The air quality forecast for Friday, September 19, is for little change in conditions. Air quality levels will be GOOD to MODERATE throughout the day.
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.
AQI Values | Levels of 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 |
Forecast Daily Maximum AQI | ||||
CITY |
THURSDAY, SEPTEMBER 18 |
FRIDAY, SEPTEMBER 19 | ||
Alpine | 42 | OZONE | 44 | OZONE |
Chula Vista | 50 | PM2.5 | 44 | PM2.5 |
Del Mar | 44 | PM2.5 | 39 | OZONE |
Downtown | 44 | PM2.5 | 39 | PM2.5 |
El Cajon | 40 | OZONE | 42 | OZONE |
Escondido | 40 | OZONE | 42 | OZONE |
Otay Mesa | 62 | PM2.5 | 58 | PM2.5 |
Kearny Mesa | 44 | PM2.5 | 39 | OZONE |
Oceanside | 50 | PM2.5 | 44 | PM2.5 |
San Ysidro | 50 | PM2.5 | 44 | PM2.5 |
Forecast Pollutant Specific Maximum AQI | ||||
THURSDAY, SEPTEMBER 18 | ||||
CITY |
OZONE | PM2.5 | ||
Alpine | 42 | GOOD | 28 | GOOD |
Chula Vista | 37 | GOOD | 50 | GOOD |
Del Mar | 37 | GOOD | 44 | GOOD |
Downtown | 35 | GOOD | 44 | GOOD |
El Cajon | 40 | GOOD | 39 | GOOD |
Escondido | 40 | GOOD | 39 | GOOD |
Otay Mesa | 38 | GOOD | 62 | MODERATE |
Kearny Mesa | 37 | GOOD | 44 | GOOD |
Oceanside | 37 | GOOD | 50 | GOOD |
San Ysidro | 36 | GOOD | 50 | GOOD |
FRIDAY, SEPTEMBER 19 | ||||
CITY |
OZONE | PM2.5 | ||
Alpine | 44 | GOOD | 28 | GOOD |
Chula Vista | 38 | GOOD | 44 | GOOD |
Del Mar | 39 | GOOD | 39 | GOOD |
Downtown | 38 | GOOD | 39 | GOOD |
El Cajon | 42 | GOOD | 33 | GOOD |
Escondido | 42 | GOOD | 33 | GOOD |
Otay Mesa | 40 | GOOD | 58 | MODERATE |
Kearny Mesa | 39 | GOOD | 39 | GOOD |
Oceanside | 38 | GOOD | 44 | GOOD |
San Ysidro | 39 | GOOD | 44 | 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.