London Atmospheric Emissions Inventory LAEI 2022

The LAEI 2022 is the latest version of the London Atmospheric Emissions Inventory and replaces previous versions of the inventory. Update May 2026: Emission datasets have been revised following discrepancies identified in the previous update (December 2025). Please refer to the Summary Note for further details. Emissions estimates of key pollutants (NOx, PM10, PM2.5 and CO2) by source type are included for the base year 2022. Emissions for previous years 2016 and 2019, and forecast years forecast years 2025 and 2030 have also been revised for a number of sources, using the latest data sources (emission factors, activity data, ...) where available, and/or changes in methodology where relevant.The area covered by the LAEI includes Greater London (the 32 London boroughs and the City of London), as well as areas outside Greater London up to the M25 motorway.These emissions have been used to estimate ground level concentrations of key pollutants NOx, NO2, PM10 and PM2.5 across Greater London for years 2022 using an atmospheric dispersion model. Air pollutant concentration maps and associated datasets are being finalised and will be available for download within the next few weeks.Due to the size of the LAEI database, most datasets are provided in several parts, as compressed ZIP files.Most of these datasets, including emission dashboards and concentration maps, are also available at Borough level, to assist London boroughs with their LLAQM (London Local Air Quality Management) duties. Documentation LAEI 2022 Summary Note (.PDF - 2.1 MB) LAEI 2022 Methodology Report (.PDF - 5.6 MB) Supporting Information Key GIS geographies and road traffic flows and vehicle-kilometres for 2022 for each vehicle type. Data are provided in Excel and GIS formats. Supporting Information - GIS geographies (.ZIP - 2.5 MB) Supporting Information - Major and Minor Roads Traffic Data - Excel (.ZIP - 7.0 MB) Supporting Information - Major and Minor Roads Traffic Data - GIS (.ZIP - 11.0 MB) Grid Emissions Summary This dataset includes emissions of key pollutants NOx, PM10, PM2.5 and CO2, and a range of additional pollutants (SO2, CH4, VOC...) in tonnes/year for 2016, 2019, 2022, 2025 and 2030 for each source category at a 1km grid square resolution (further split to follow all London borough boundaries). It includes emission summary tables for London boroughs and London zones (Central / Inner / Outer London). Data are provided in Excel and GIS formats. Emissions - Data - Excel Files (.ZIP - 120.0 MB) Emissions - Data - GIS Files (.ZIP - 90.4 MB) Emissions - Summary Dashboards (.ZIP - 22.4 MB) Detailed Road Transport Road transport NOx, PM10, PM2.5 and CO2 emissions in 2022 by vehicle type. PM emissions include split by exhaust, break wear and tyre wear. This data is provided at link level for major roads and at grid level for minor roads and cold start emissions. Data are provided in Excel and several GIS formats. Emissions - Detailed Road Transport - Major Roads - GIS Files (.ZIP - 437.0 MB) Emissions - Detailed Road Transport - Major Minor Roads and Cold Start - Excel (.ZIP - 127.2 MB) Concentrations This dataset includes modelled 2022 ground level concentrations of annual mean NOx, NO2, PM10 and PM2.5 in µg/m3 (microgramme per cubic metre) at 20m grid resolution. For PM10, it also includes the number of daily means exceeding 50 µg/m3. Data are provided in CSV, GIS (ESRI) and PDF/JPG formats. Concentrations - Data - ASCII Files (.ZIP - 132.7 MB) Concentrations - Data - CSV Files (.ZIP - 180.1 MB) Concentrations - Data - GIS Files (.ZIP - 128.5 MB). Includes GIS files in ESRI format to visualise the concentrations in a GIS software (ArcGIS) Concentrations - Maps 2022 - PDF / Image Files (.ZIP - 51.9 MB) Population Exposure and Proportion of Road Length Exceeding This dataset, based on the modelled 2022 ground level concentrations, includes: Estimations of the number of Londoners exposed to NO2 and PM2.5 annual average concentrations above the WHO and UK guidelines Estimations of the number of schools, hospitals and care homes in areas of London where NO2 and PM2.5 annual average concentrations above the WHO and UK guidelines Estimations on the proportion of road length exceeding the WHO and UK annual limit values for NO2 Population, School, Hospitals, Care Home Exposure and Proportion of Road Length Exceeding (.ZIP - 2.5 MB)

Organization: Greater London Authority