SmogRank / Countries / Switzerland
Most polluted cities in Switzerland
3 measured cities, last 24 hours; 2 above the WHO 24-hour guideline. Worst: Bellinzona at 23.2 µg/m³, #51 in the world.
3 moderate
- 1BellinzonaTicino 23.21.5×
- 2Winterthurlow-cost sensorsZurich 15.71.0×
- 3ZürichZurich 11.00.7×
Estimated: cities without a monitor
Switzerland cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.
| City | 7-day estimate |
|---|---|
| Geneva | ≈ 8 µg/m³ |
| Lausanne | ≈ 9 µg/m³ |
| Luzern | ≈ 11 µg/m³ |
| Sankt Gallen | ≈ 15 µg/m³ |
| Biel/Bienne | ≈ 7 µg/m³ |
| Thun | ≈ 7 µg/m³ |
| Köniz | ≈ 8 µg/m³ |
| Fribourg | ≈ 9 µg/m³ |
| La Chaux-de-Fonds | ≈ 6 µg/m³ |
| Schaffhausen | ≈ 11 µg/m³ |
| Chur | ≈ 5 µg/m³ |
| Rapperswil | ≈ 9 µg/m³ |
| Uster | ≈ 10 µg/m³ |
| Sitten | ≈ 5 µg/m³ |
| Neuchâtel | ≈ 8 µg/m³ |
| Emmen | ≈ 11 µg/m³ |
| Zug | ≈ 12 µg/m³ |
| Yverdon-les-Bains | ≈ 9 µg/m³ |
| Vernier | ≈ 8 µg/m³ |
| Montreux | ≈ 9 µg/m³ |
| Frauenfeld | ≈ 11 µg/m³ |
| Kriens | ≈ 11 µg/m³ |
| Wetzikon | ≈ 10 µg/m³ |
| Wil | ≈ 13 µg/m³ |
| Bulle | ≈ 9 µg/m³ |
| Horgen | ≈ 12 µg/m³ |
| Kreuzlingen | ≈ 15 µg/m³ |
| Opfikon | ≈ 10 µg/m³ |
| Aarau | ≈ 12 µg/m³ |
| Renens | ≈ 10 µg/m³ |
| Dietikon | ≈ 10 µg/m³ |
| Baar | ≈ 12 µg/m³ |
| Bülach | ≈ 10 µg/m³ |
| Riehen | ≈ 12 µg/m³ |
| Vevey | ≈ 9 µg/m³ |
| Dübendorf | ≈ 10 µg/m³ |
| Meyrin | ≈ 8 µg/m³ |
| Carouge | ≈ 10 µg/m³ |
| Baden | ≈ 10 µg/m³ |
| Reinach | ≈ 11 µg/m³ |
Regions
Measured cities in each region (30 days).
Updated 2026-10-01 20:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.