The three charts below indicate that the current trend in concentrations of NO2, PM10 and PM2.5 is almost flat.  Nitrogen dioxide concentrations declined substantially between 2017 and the worst of covid.  The U-shape in particulate matter concentrations over the last couple of years (perhaps attributable to meteorological or climate change effects) will hamper assessment of the impact on air quality of the SIlvertown Tunnel.

Since the end of March 2025, data from all but one of the reference monitors in Lewisham has ceased being reported in real time.

Source:  based on London Air and Air Quality England

 

 

 

 

Lewisham Council has been monitoring NO2 using diffusion tubes at about 100 sites since 2017.  Click here for annual reports providing their measurements and locations.