SmogRank / Countries / Switzerland / September 2023

Most polluted cities in Switzerland, September 2023

5 cities in Switzerland ranked by their average PM2.5 over the 30 days. Worst: Bern at 8.4 µg/m³, #805 of 1,830 cities in the world. Cleanest: Basel at 7.0. A city needs measurements on 70% of the days to be ranked.

  1. 1BernBern
    8.4
  2. 2ZürichZurich
    8.0
  3. 3LuganoTicino
    7.5
  4. 4BellinzonaTicino
    7.3
  5. 5BaselBasel-City
    7.0
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

All cities in the world, September 2023 · Switzerland now

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SmogRank, most polluted cities in Switzerland, PM2.5, September 2023, smogrank.com/ch/history/2023-09 (accessed 2 Oct 2026).

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