London Atmospheric Emissions Inventory (LAEI) 2019

Update August 2025: The LAEI 2019 has now been superseded. Click here to access the LAEI 2022 data

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 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 2019, 2025 and 2030 using an atmospheric dispersion model. Air pollutant concentration maps and associated datasets are available for download. Due to the size of the LAEI database, datasets are provided in several parts and provided as ZIP files.

Update 24 04 2023: Emissions and Concentration Maps for forecast years 2025 and 2030 have been added. Road Transport emissions for Major Roads, Minor Roads and Cold Start are now also available as Excel files.

Documentation

 LAEI Summary Note  (.PDF - 3.4 MB)

Supporting Information Key GIS geographies and road traffic flows and vehicle-kilometres for 2019 for each vehicle type. Data are provided in Excel and GIS formats.

 Supporting Information - GIS geographies  (.ZIP - 2.5 MB)


 Supporting Information - Road Traffic Data - Excel  (.ZIP - 22.4 MB)


 Supporting Information - Road Traffic Data - GIS  (.ZIP - 9.7 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 2013, 2016, 2019, 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.

 Update 26 07 2022 : Please note that emission totals have been slightly revised to correct emissions for Rail and Construction NRMM Exhaust (for CO2) and Industrial / Commercial Heat and Power sources (for all pollutants). Please refer to the Emissions - Data - Excel File below for further information.


 Emissions - Data - Excel Files  (.ZIP - 96.4 MB)


 Emissions - Data - GIS Files  (.ZIP - 76.2 MB)


 Emissions - Summary Dashboards  (.ZIP - 3.16 MB)

Detailed Road Transport Road transport NOx, PM10, PM2.5 and CO2 emissions in 2019, 2025 and 2030 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 - Geopackage GPKG (.ZIP - 321.2 MB)


Emissions - Detailed Road Transport - Major Roads - Mapinfo TAB (.ZIP - 288.7 MB)


Emissions - Detailed Road Transport - Major Roads - ESRI SHP (.ZIP - 303.6 MB)


Emissions - Detailed Road Transport - Major Roads - Excel (.ZIP - 327.2MB)


Emissions - Detailed Road Transport - Minor Roads - Excel (.ZIP - 15.4 MB)


Emissions - Detailed Road Transport - Cold Start - Excel (.ZIP - 3.0 MB)

Concentrations This dataset includes modelled 2019, 2025 and 2030 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 formats.

 Concentrations - Data - ASCII Files  (.ZIP - 393.3 MB)


 Concentrations - Data - Excel Files  (.ZIP - 536.4 MB)


 Concentrations - Data - GIS Files  (.ZIP - 391.9 MB). Includes GIS files in ESRI format to visualise the concentrations in a GIS software (ArcGIS)


Concentrations - Maps 2019 - PDF / Image Files (19.2 MB)


Concentrations - Maps 2025 - PDF / Image Files (29.9 MB)


Concentrations - Maps 2030 - PDF / Image Files (22.6 MB)

Population Exposure These datasets include estimations of the number of Londoners and number of schools, hospitals and care homes in London exposed to an annual average NO2 concentration above the Air Quality Strategy objective of 40µg/m3 and PM2.5 concentration above the interim WHO Guideline of 10µg/m3, based on the modelled 2019 ground level concentrations. A comparison with previous 2016 concentrations modelled for the LAEI 2016 inventory is also provided.

 NO2 Population Exposure  (.XLSX - 278 KB)


 NO2 and PM2.5 School Exposure  (.XLSX - 1.8 MB)


NO2 and PM2.5 Hospital and Care Home Exposure (.XLSX - 64 KB)

Data and Resources

Additional Info

Field Value
Source https://data.london.gov.uk/dataset/london-atmospheric-emissions-inventory-laei-2019-e758q
Last Updated October 22, 2025, 11:57 (UTC)
Created October 22, 2025, 11:57 (UTC)
GUID e758q
Language
dcat_issued 2021-10-14T13:15:52.000Z
dcat_modified 2025-08-06T09:39:21.274Z
harvest_object_id fe40b0f1-bc80-4246-8a59-2ca7c81ea08f
harvest_source_id a3e8ccdb-5c53-4b4b-9db7-ae23b3e3e29f
harvest_source_title london