Air Quality Index Today
Air quality in London is currently moderate, with a US AQI of 63 and a PM2.5 concentration of 3.3 µg/m³. Air quality is acceptable; people who are unusually sensitive should consider limiting prolonged outdoor exertion.
Pollutant Concentrations in London
| Pollutant | Concentration |
|---|---|
| PM2.5 | 3.3 µg/m³ |
| PM10 | 3.5 µg/m³ |
| O₃ (ozone) | 39 µg/m³ |
| NO₂ | 16 µg/m³ |
| SO₂ | 2.7 µg/m³ |
| CO | 184 µg/m³ |
See the full forecast for London →
Updated at 16:52 local time, 7 October 2026
Air quality now across 42 countries and territories (capital cities, worst first)
| Country | AQI | Level | PM2.5 (µg/m³) |
|---|---|---|---|
| Saudi Arabia (Riyadh) | 262 | Very unhealthy | 93.4 |
| Malaysia (Kuala Lumpur) | 189 | Unhealthy | 168.6 |
| India (New Delhi) | 184 | Unhealthy | 68.5 |
| Indonesia (Jakarta) | 174 | Unhealthy | 182.1 |
| China (Beijing) | 167 | Unhealthy | 154.6 |
| Bangladesh (Dhaka) | 159 | Unhealthy | 98.0 |
| Iraq (Baghdad) | 155 | Unhealthy | 46.2 |
| Iran (Tehran) | 147 | Unhealthy for sensitive groups | 115.9 |
| Thailand (Bangkok) | 145 | Unhealthy for sensitive groups | 34.3 |
| Pakistan (Islamabad) | 139 | Unhealthy for sensitive groups | 55.9 |
| United Arab Emirates (Abu Dhabi) | 114 | Unhealthy for sensitive groups | 49.7 |
| Nigeria (Abuja) | 106 | Unhealthy for sensitive groups | 27.4 |
| Czechia (Prague) | 83 | Moderate | 10.8 |
| Hong Kong | 75 | Moderate | 40.9 |
| Chile (Santiago) | 72 | Moderate | 15.7 |
| Japan (Tokyo) | 71 | Moderate | 43.9 |
| South Korea (Seoul) | 71 | Moderate | 47.4 |
| Belgium (Brussels) | 67 | Moderate | 10.6 |
| DR Congo (Kinshasa) | 65 | Moderate | 20.4 |
| Netherlands (Amsterdam) | 65 | Moderate | 22.1 |
| United Kingdom (London) | 63 | Moderate | 3.3 |
| Philippines (Manila) | 61 | Moderate | 15.7 |
| Myanmar (Naypyidaw) | 60 | Moderate | 20.7 |
| Austria (Vienna) | 56 | Moderate | 5.4 |
| Taiwan (Taipei) | 56 | Moderate | 13.2 |
| Egypt (Cairo) | 54 | Moderate | 12.7 |
| United States (Washington, D.C.) | 53 | Moderate | 6.9 |
| Colombia (Bogotá) | 52 | Moderate | 5.0 |
| Peru (Lima) | 52 | Moderate | 10.5 |
| France (Paris) | 51 | Moderate | 6.2 |
| Spain (Madrid) | 50 | Good | 4.0 |
| Turkey (Ankara) | 43 | Good | 6.5 |
| Mexico (Mexico City) | 41 | Good | 10.3 |
| Italy (Rome) | 40 | Good | 6.3 |
| Brazil (Brasília) | 39 | Good | 3.1 |
| Finland (Helsinki) | 33 | Good | 1.8 |
| Russia (Moscow) | 27 | Good | 7.8 |
| Ireland (Dublin) | 26 | Good | 5.6 |
| Sweden (Stockholm) | 26 | Good | 3.4 |
| Canada (Ottawa) | 25 | Good | 2.6 |
| Norway (Oslo) | 23 | Good | 6.1 |
| Australia (Canberra) | 22 | Good | 5.2 |
How the AQI works
This page uses the US AQI scale: 0–50 is good, 51–100 moderate, 101–150 unhealthy for sensitive groups, 151–200 unhealthy, 201–300 very unhealthy and above 300 hazardous. The index follows whichever pollutant scores worst, most often fine particles (PM2.5) or ozone.
Where the figures come from
Values are taken from the CAMS (Copernicus) atmospheric model, not from a sensor at your location, so they can differ from a nearby monitoring station, especially close to busy roads or during wildfire smoke. The AQI is calculated from running averages (24 hours for particles, 8 hours for ozone), while the concentrations in the table are the latest hourly values, so the two do not always move together. For regulatory or health decisions, use your national air-quality service.