Is there a reason for the bad air quality in Rotkreuz/ZH today?

19 comments
  1. At first I was like: Oh, I didn’t know there is also a Rotkreuz in Zürich.

    Now I am offended and shocked.

  2. I’d guess due to the “Inversionslage” air doesn’t mix as much as usual and the polution stays under the fog. Not a lot of wind currently aswell
    Look at London 1952 smog on wiki if you want to know more.

  3. Meanwhile my whole fcking country is red and the capital is the most polluted city in the world yet the people don’t give a fuck

  4. If that station is a “Air Visual” sensor (from the company that publishes that map) we also have to consider that those sensors don’t “dry” the air bevore they take the measurments. (Professional stations dry the air first.) This means that if there is fog in the area, the measured values are higher than they should be because little water drops bond with fine particles so that the sensor thinks there are more fine particles than there actually are.

    When there is fog you’ll always see quite a difference between expensive sensors (usually government sensors) and the inexpensive private sensors.

    (Source: I was the first person in Switzerland who operated a private “AirVisual” sensor.)

  5. I found this in an article:

    Pollution levels in Swiss towns and cities vary too. Switzerland’s most polluted town in 2020 was Rotkreuz in Zug. PM2.5 concentrations there averaged 15.4 μg/m3 and went as high as 22.9 μg/m3 in November 2020.

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