Levels of nitrogen dioxide in London

Annual roadside NO2 concentrations in London dropped by nearly half (49 per cent) between 2016 and 2023, due to measures such as London’s Low Emission Zone, the Ultra Low Emission Zone and the introduction of cleaner buses. Despite this progress, the most recent London-wide monitoring data shows that there is a long way to go until Londoners are breathing clean air.

The map below displays recorded levels of NO2 across London in 2022, which is the latest annual data available. Anything yellow, orange or red shows levels above World Health Organization guidelines. As you can see, almost all Londoners are breathing air that is over the guidelines, some by nearly five times. 

Click on a coloured dot to find out more about the air at each monitoring station.