GLA and TFL Air Quality

Air pollution is monitored by the London boroughs within their own area. There are a number of different monitoring methods available, including passive diffusion tubes. These diffusion tubes are small, passive samplers which measure the concentration of nitrogen dioxide (NO2) in the air at a certain location, providing a monthly average measurement. The diffusion tubes supplement the existing network of...

According to the LAEI 2019, there are 160 Air Quality Focus Areas in London. The Focus Areas are locations that not only exceed the EU annual mean limit value for NO2 but are also locations with high human exposure. They were defined to address concerns raised by boroughs within their Local Air Quality Management (LAQM) review process and forecasted air pollution trends. This is not...

The LAEI 2019 is the latest version of the London Atmospheric Emissions Inventory and replaces previous versions of the inventory. Emissions estimates of key pollutants (NOx, PM10, PM2.5 and CO2) by source type are included for the base year 2019 and forecast years 2025 and 2030. Emissions for previous years 2013 and 2016 have also been revised, using the latest data...

To help clear London's air and improve public health, the Ultra Low Emission Zone (ULEZ) is expanding across all London boroughs from 29 August 2023. The current ULEZ covers inner London up to (but not including) the North and South Circular Roads. The new boundary will be the same as the existing London-wide Low Emission Zone. For...

The LAEI 2016 has been superseded. Click here for the full list of releases. Emissions estimates of key pollutants (NOx, PM10, PM2.5 and CO2) by source type are included for the base year 2016. Emissions for previous years 2010 and 2013 have also been recalculated, using the latest data sources (emission factors, activity data, ...) and methodology. Emissions projected...

(Minor update on 07/11/2019, following feedback from Hillingdon. Hillingdon Pump Lane Focus Area has been included in the Hayes Focus Areas) According to the LAEI 2016, there are 183 Air Quality Focus Areas in London. The Focus Areas are locations that not only exceed the EU annual mean limit value for NO2 but are also locations with high human exposure. They were defined to address concerns...