London's Air Pollution in Real-Time

Breathe London has installed 100 air pollution monitors across the capital to capture data on the city's air quality. The monitors measure levels of nitrogen dioxide (NO₂), nitric oxide (NO), particulate matter (PM) and carbon dioxide (CO₂).

You can view the latest nitrogen dioxide air pollution levels across London on the Breathe London interactive map. The map allows you to view the latest hourly average level of nitrogen dioxide recorded by each monitor and the hourly averages for the past 24 hours. If you click on the 'more data' link you can also view all the historical data captured by that monitor. The colors of the air monitor markers on the map indicate the latest hourly average recording of nitrogen dioxide.


As well as showing the latest readings from the 100 Breathe London monitors the interactive map also shows the latest readings from other air pollution monitors installed across London by the London Air Quality Network. The London Air Quality Network's London Air website also features an interactive map which shows London's current air quality based on near real-time readings from air pollution monitors.

London Air has also created an interactive map which shows the annual air pollution levels across London (2013). The Annual Pollution Maps provide a useful overview of where you can expect to experience the worst nitrogen dioxide levels across the city based on historical recordings. The map also allows you to view the annual pollution levels for ozone, PM2 and PM10.