· · not an observation
Worst forecast air in our cities, next 48 h: Bangkok, Thailand — AQI 106 (Unhealthy for Sensitive Groups), Ozone (O₃), Sat 4 PM local time
Peak US AQI (EPA scale) in our 86 forecast cities over the next 48 hours, computed by Weathershot from the Copernicus CAMS forecast. Times are local to each city.
| City | Peak AQI | Main pollutant | When |
|---|---|---|---|
| Bangkok, Thailand | 106Unhealthy for Sensitive Groups | Ozone (O₃) | Sat 4 PM |
| Milan, Italy | 89Moderate | PM2.5 | Sun 10 AM |
| Chiang Mai, Thailand | 79Moderate | Ozone (O₃) | Sat 4 PM |
| Lake Como | 79Moderate | PM2.5 | Sun 10 AM |
| Beaverton, OR | 77Moderate | PM2.5 | Fri 4 AM |
| Aspen, CO | 72Moderate | PM2.5 | Fri 5 PM |
| Lake Garda (Sirmione) | 70Moderate | PM2.5 | Sun 10 AM |
| Antwerp, Belgium | 69Moderate | PM2.5 | Sat 10 PM |
| Brussels, Belgium | 66Moderate | PM2.5 | Sat 7 PM |
| Galveston, TX | 66Moderate | PM2.5 | Sat 12 AM |
44 of 86 cities stay in the Good band (AQI 0–50) for the whole 48 hours.
This index is computed from a model forecast. It is not a reading from monitoring stations and not an official alert. Official measurements and alerts: AirNow (USA) · European Air Quality Index (EEA) (Europe).
The map shows a forecast air quality index: the worst of five pollutants — PM2.5, PM10, ozone (O₃), nitrogen dioxide (NO₂) and sulphur dioxide (SO₂). Switch between the US EPA scale (0–500) and the European EEA scale. Over Europe the forecast comes from CAMS Europe (10 km, an ensemble of regional models), elsewhere from CAMS global (about 40 km). Drag the timeline to move through the forecast; tap the map for the forecast at a place.
Updated: CAMS run 00 UTC, 12 Nov 2026 · built 11:43 UTC, 13 Nov 2026 · Model forecast, not a measurement or warning.
· · not an observation