Humidity: 70% Dewpoint:70° F Baro: 30.18 in. Visibility: 10.00 mi Report Age:
27
Detail ▶
Excellent Air Quality Air quality is satisfactory.
X Close
27
Excellent Air Quality
Air quality is satisfactory, and air pollution poses little or no risk.
Show Scale Definitions
The AQI is calculated based on measurements of key air pollutants like ozone, particulate matter (PM2.5 and PM10), carbon monoxide, sulfur dioxide, and nitrogen dioxide. The highest AQI value among these pollutants is then reported, indicating the overall air quality level.
AQI Basics for Ozone and Particle Pollution
Daily AQI Color
Levels of Concern
Values of Index
Description of Air Quality
Green
Good
0 to 50
Air quality is satisfactory, and air pollution poses little or no risk.
Yellow
Moderate
51 to 100
Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.
Orange
Unhealthy for Sensitive Groups
101 to 150
Members of sensitive groups may experience health effects. The general public is less likely to be affected.
Red
Unhealthy
151 to 200
Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects.
Purple
Very Unhealthy
201 to 300
Health alert: The risk of health effects is increased for everyone.
Maroon
Hazardous
301 and higher
Health warning of emergency conditions: everyone is more likely to be affected.
Dominant Pollutant: Ozone Ground-level Ozone can aggravate existing respiratory diseases and also lead to throat irritation, headaches, and chest pain.
81° Partly Cloudy
San Diego, California
Report Age: 
Sun: 5:15 am - 8:39 pm
Morning Crescent Moon: 3:55 am - 8:35 pm
50%
