GLA and TFL Air Quality

The GLA have produced updates to the tree canopy cover and green cover assessments previously produced in November 2018 and January 2019 respectively (based on 2016 data).  The 2024 updates are based on data primarily from 2022 and estimate London’s tree canopy cover at 19.6% (±0.3%) and its green cover at 51.7% (±1.11%).  These estimates were produced via a ‘machine learning’ computer modelling technique that uses algorithms to assess ...

The GLA have produced updates to the tree canopy cover and green cover assessments previously produced in November 2018 and January 2019 respectively (based on 2016 data).  The 2024 updates are based on data primarily from 2022 and estimate London’s tree canopy cover at 19.6% (±0.3%) and its green cover at 51.7% (±1.11%).  These estimates were produced via a ‘machine learning’ computer modelling technique that uses algorithms to assess ...

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 more accurate reference analyser...

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 an exhaustive list of London’s hotspot locations, but ...

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 sources (emission factors, activity data, ...) where available, and ch...

Following the release of the latest London Atmospheric Emissions Inventory (LAEI) 2019, additional data has been produced at Borough level, to assist London boroughs with their LLAQM (London Local Air Quality Management) duties. The data below is based on the NOx, NO2, PM10 and PM2.5 emissions and ground level NOx, NO2 and PM concentrations already published as part of the LAEI 2019. It includes the following datasets, which can be down...

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 more information on the ULEZ expansion please visit: https://tfl.gov.uk/modes/driving/ultra-low-e...

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 forward to 2020, 2025, and 2030 will be available soon. The are...

(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 raised by boroughs within the LAQM review pr...

Following the release of the latest London Atmospheric Emissions Inventory (LAEI) 2016, additional data has been produced at Borough level, to assist London boroughs with their LLAQM (London Local Air Quality Management) duties. The data below is based on the NOx, NO2, PM10 and PM2.5 emissions and ground level concentrations already published as part of the LAEI 2016. It includes the following datasets, which can be downloaded below: ...