Real-time Air Quality Index
London Air Quality Index (AQI)
23US AQI
Good
The current Air Quality Index in London, United Kingdom is 23, which is considered good. The fine particulate (PM2.5) concentration is 6.7 µg/m³.
Last updated · Source: CAMS forecast model
Pollutant levels in London
PM2.56.7 µg/m³Fine particulate matter
PM1010.5 µg/m³Coarse particulate matter
O₃41 µg/m³Ozone
NO₂11.8 µg/m³Nitrogen dioxide
SO₂1.2 µg/m³Sulphur dioxide
CO159 µg/m³Carbon monoxide
Health advice
Air quality is good and poses little or no health risk. It is a great time for outdoor activities for everyone.
7-day AQI trend
| Day | AQI | Category |
|---|---|---|
| Jul 2 | 25 | Good |
| Jul 3 | 31 | Good |
| Jul 4 | 28 | Good |
| Jul 5 | 21 | Good |
| Jul 6 | 22 | Good |
| Jul 7 | 23 | Good |
| Jul 8 | 31 | Good |
About the Air Quality Index
The Air Quality Index (AQI) converts measured pollutant concentrations — including PM2.5, PM10, ozone (O₃), nitrogen dioxide (NO₂), sulphur dioxide (SO₂), and carbon monoxide (CO) — into a single 0–500 scale. Higher values mean greater health risk. The reading for London reflects a CAMS forecast model and updates throughout the day. Learn what the AQI number means for your body.