Air Quality
I noticed something strange in the iOS weather app: The air quality index seems to be defined relative to the country from which one accesses the air quality map.
Below is an example (screenshots were taken minutes apart). The left panel shows air quality as reported on the 'Dutch scale' and the right panel shows the same on the 'German scale'.
It seems as if these countries (?) have vastly different ideas of what is 'good' for humans. Curiously, BreezoMeter seems to be the source of the data for both.
Edit (2023-06-25 15:05 UTC): I should highlight that the value 7 for Amsterdam is translated as 'insufficient' using the Dutch scale while the German scale rates the air quality at the same place and time as 'good'.
Below is an example (screenshots were taken minutes apart). The left panel shows air quality as reported on the 'Dutch scale' and the right panel shows the same on the 'German scale'.
It seems as if these countries (?) have vastly different ideas of what is 'good' for humans. Curiously, BreezoMeter seems to be the source of the data for both.
Edit (2023-06-25 15:05 UTC): I should highlight that the value 7 for Amsterdam is translated as 'insufficient' using the Dutch scale while the German scale rates the air quality at the same place and time as 'good'.