Netatmo NWS01 Bedienungsanleitung Seite 21

Understanding the Pollutant Standards Index
The Air pollution index (PSI) is based on air monitoring station on the same day PM10 (does not include the 10-
micron particle size of suspended particles than coarse-grained) values, the concentration of sulfur dioxide, nitrogen
dioxide, carbon monoxide and ozone concentrations.
It is divided into 5 categories:
"Good" PSI is 0 - 50.
"Moderate" PSI is 51 - 100.
"Unhealthy" PSI is 101 - 199.
"Very Unhealthy" PSI is 200 - 299.
"Hazardous" PSI higher than 300.
Where does the outdoor PSI in Taiwan come from?
The PSI in Taiwan is provided by the Environmental Protection Administration, Executive Yuan R.O.C. (Taiwan).
More information can be found
Air Quality (Greater Mexico City)
Metropolitan Air Quality Index (IMECA)
Metropolitan Air Quality Index (IMECA) in Mexico is displayed on the outdoor dashboard.
Complementary information available on the mobile app
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.
IMECA colors
This color code scale makes it easier for anyone to understand quickly whether the air is polluted.
here.