SmogRank / World / Switzerland / 2023

Most polluted cities in Switzerland, 2023

5 cities in Switzerland ranked by their average PM2.5 over the 365 days; 5 above the WHO annual guideline (5.0 µg/m³). Worst: Bellinzona at 8.3 µg/m³, #569 of 969 cities in the world. Cleanest: Zürich at 6.9. A city needs measurements on 70% of the days to be ranked.

← Bellinzona 8.3 WHO annual guideline
Every city in Switzerland ranked for 2023, one column each, worst on the left and cleanest on the right. Point at it to read a city; tap to open it.
  1. 1BellinzonaTicino
    461.7×
  2. 2LuganoTicino
    431.6×
  3. 2BernBern
    431.6×
  4. 4BaselBasel-City
    401.4×
  5. 5ZürichZurich
    381.4×
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

All cities in the world, 2023 · Switzerland now

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

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