By touching on the "..." button in the air quality gauge, you can view complementary information (when available):
main pollutant, hour and location of the report.
AQI colors
This color code scale makes it easier for anyone to understand quickly whether the air is polluted.
Understanding the Air Pollution Index
The Air Pollution Index is based on the following pollutants: SO2, NO, NO2, OX, NMHC, PM10 and PM2.5. It is
divided into seven categories:
"Good" AQI is 0 - 100. Air quality is considered satisfactory, and air pollution poses little or no risk.
"Moderate" AQI is 101 - 200. Air quality is acceptable; however, for some pollutants there may be a moderate
health concern for a very small number of people. For example, people who are unusually sensitive to ozone may
experience respiratory symptoms.
"Unhealthy for Sensitive Groups" AQI is 201 - 300. Although general public is not likely to be affected at this AQI
range, people with lung disease, older adults and children are at a greater risk from exposure to ozone, whereas
persons with heart and lung disease, older adults and children are at greater risk from the presence of particles in
the air.
"Unhealthy" AQI is 301 - 400. Everyone may begin to experience some adverse health effects, and members of the
sensitive groups may experience more serious effects.
"Very Unhealthy" AQI is 401 - 500. This would trigger a health alert signifying that everyone may experience more
serious health effects.
"Hazardous" AQI higher than 500. This would trigger a health warning of emergency condition. The entire population
is then more likely to be affected.
Where does the outdoor AQI in Japan come from?
The AQI in Japan is based on Air Pollution data provided by the Atmospheric Environmental Regional Observation
System : AEROS. This Air Pollution data is summed-up as a comprehensive Air Quality Index (AQI) using
formulae similar to American and European standard formulae. The Air Pollution data can be found here.
Air Quality (Taiwan)
Outdoor Pollutant Standards Index (PSI)
The Pollutant Standards Index (PSI) in Taiwan is displayed on the outdoor dashboard.
Complementary information
