SmogRank / Countries / Switzerland / January 2025

Most polluted cities in Switzerland, January 2025

5 cities in Switzerland ranked by their average PM2.5 over the 31 days. Worst: Bellinzona at 14.9 µg/m³, #280 of 1,937 cities in the world. Cleanest: Lugano at 8.8. A city needs measurements on 70% of the days to be ranked.

  1. 1BellinzonaTicino
    14.9
  2. 2BaselBasel-City
    12.7
  3. 3BernBern
    11.9
  4. 4ZürichZurich
    11.3
  5. 5LuganoTicino
    8.8
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, January 2025 · Switzerland now