Are you satisfied with the number of nitrogen dioxide (NO2) monitoring stations in London?

London has one of the most comprehensive air quality monitoring networks of any global city, and the highest number of monitoring stations of any city in the UK. In terms of the highest-quality reference monitoring, nitrogen dioxide (NO2) is constantly monitored by reference analysers at 127 locations. This is an increase of 15% from 2016 to 2020. In 2020 there were also 1,699 locations measuring NO2 using passive diffusion tubes. My Breathe London Network also supplements the reference monitoring network with low-cost sensors, with 277 currently installed across London monitoring NO2.

I will continue to work with the boroughs to improve the provision of real-time air quality data, including for NO2.