SmogRank / Countries / Switzerland / July 2026

Most polluted cities in Switzerland, July 2026

6 cities in Switzerland ranked by their average PM2.5 over the 31 days. Worst: Bellinzona at 10.8 µg/m³, #934 of 2,262 cities in the world. Cleanest: Zürich at 7.6. A city needs measurements on 70% of the days to be ranked.

  1. 1BellinzonaTicino
    10.8
  2. 2BernBern
    8.7
  3. 3BaselBasel-City
    8.2
  4. 4LuganoTicino
    8.0
  5. 5Winterthurlow-cost sensorsZurich
    7.7
  6. 6ZürichZurich
    7.6
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, July 2026 · Switzerland now