Increase Your Air Quality IQ
Air quality affects your health and can change daily or even hourly like the weather.
The Air Quality Index (AQI) is a measurement of five air pollutants: ground-level ozone (O3), particle pollution (also known as particulate matter, PM), carbon monoxide (CO), sulfur dioxide (SO2), and nitrogen dioxide (NO2), and tells how clean or polluted the air is.
AQI is categorized into levels of health concern and is expressed as a number from 0 to 500 and corresponding color. See the table below:
Readings up to 100 are generally considered satisfactory.
The higher the number the worse the air quality.
It is best to limit outdoor activities when AQI measurements are high.
Older adults, children (including teenagers), and those who have heart and lung conditions can be more sensitive to poor air quality and should take notice of the area AQI.
Hanoi AQI readings for PM2.5 and PM10, and SO2 can be found here.
Concordia checks AQI multiple times per day from multiple sources to ensure students are safe.