SmogRank / World / Switzerland / September 2024
Most polluted cities in Switzerland, September 2024
1 city in Switzerland ranked by their average PM2.5 over the 30 days. Worst: Winterthur at 7.2 µg/m³, #816 of 1,555 cities in the world. A city needs measurements on 70% of the days to be ranked.
- 1Winterthurlow-cost sensorsZurich 7.2
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 2024 · Switzerland now
Use this board
SmogRank, most polluted cities in Switzerland, PM2.5, September 2024, smogrank.com/ch/history/2024-09 (accessed 2 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.