The map shows the annual mean Nitrogen Dioxide (NO2) concentrations in Europe based on daily averages with at least 75% of valid measurements, in µg/m3 (source: EEA, AirBase v.8 & AQ e-Reporting)Thresholds used in the map for the annual values [µg/m3]:≤ 20> 20 ≤ 30> 30 ≤ 40: (40 µg/m3, limit value for human health as set out in the Air Quality Directive, 2008/50/EC, as well as the WHO's limit value for the annual mean)> 40 ≤ 50> 50Source: AirBase v.8 & AQ e-ReportingAirBase is the European air quality database maintained by the EEA through its European topic centre on Air pollution and Climate Change mitigation. It contains air quality monitoring data and information submitted by participating countries throughout Europe.The air quality database consists of a multi-annual time series of air quality measurement data and statistics for a number of air pollutants. It also contains meta-information on those monitoring networks involved, their stations and their measurements.The database covers geographically all EU Member States, the EEA member countries and some EEA candidate countries. The EU Member States are bound under Decision 97/101/EC to engage in a reciprocal exchange of information (EoI) on ambient air quality. The EEA engages with its member and collaborating countries to collect the information foreseen by the EoI Decision because air pollution is a pan European issue and the EEA is the European body which produces assessments of air quality, covering the whole geographical area of Europe.

Dataset Name: Nitrogen Dioxide Data Owner: DEFRAContact: https://www.gov.uk/government/organisations/department-for-environment-food-rural-affairs#org-contactsSource: Data.gov.ukSource URL: https://uk-air.defra.gov.uk/data/laqm-background-mapsUploaded to SPACE Portal: 23/01/2023Update Frequency: see DEFRA websiteScale Threshold: N/AProjection : Irish GridFormat: Esri Feature Layer (hosted) Point dataNotes:Please note: These background mapped data are specifically for LAQM purposes only. Please use them in conjunction with reading the Background Maps User Guide. The projections in the 2018 LAQM background maps are based on assumptions which were current before the Covid-19 outbreak in the UK. In consequence these maps do not reflect short or longer term impacts on emissions in 2020 and beyond resulting from behavioural change during the national or local lockdowns.Only the most recent mapped data should be used for new air quality assessments. Older data can continue to be used for research or on-going assessments.For more general interest in UK air quality mapping please visit the UK Ambient Air Quality Interactive Map

Average annual nitrogen dioxide (NO₂) levels in London have been declining in recent years. NO₂ levels at roadside sites in central London averaged 33 micrograms per cubic meter (µg/m³) in 2023, representing a reduction of 65 percent relative to 2016 levels. In 2019, the Ultra Low Emission Zone (ULEZ) was introduced in central London. Operating 24 hours a day, seven days a week, drivers of vehicles who enter this zone which do not meet ULEZ emission standards are required to pay a daily charge.

Compliance Status is determined using a combination of fixed measurements from Defra’s Automatic Urban Rural Network and supplementary assessment. Supplementary assessment includes modelled background and roadside pollutant values from Defra’s Pollution Climate Mapping Model.

Glasgow City Council is required to review and assess air quality within its area. These reviews are the basis of local air quality management and are intended to compare current and future concentrations of key air pollutants with the objectives set in the National Air Quality Strategy. The National Air Quality Strategy has set and updated target concentrations for eight key air pollutants - benzene, 1,3-butadiene, carbon monoxide, lead, nitrogen dioxide, ozone, particles and sulphur dioxide. Glasgow City Council is required to undertake a continuing review of these air pollutants within its area. More Info Nitrogen Dioxide (NO2) Diffusion Tubes are used in the monitoring of ambient atmospheric NO2 to give an indication of longer-term average NO2 concentrations. They are useful for identifying areas of high NO2 concentration, particularly when dealing with sources such as traffic emissions, which do not change much from day to day. This dataset provides the current location of diffusion tubes using Ordinance Survey OS GB36 coordinates. Contains Ordnance Survey data (c) Crown Copyright 2013. Licence: None no2csv-dbf.zip - https://dataservices.open.glasgow.gov.uk/Download/Organisation/de0f1bfc-ed16-429a-b03c-6a63a178efb1/Dataset/6fdb2747-e809-4108-8862-ca3c0dd9d4c6/File/005eaaa6-adf2-403e-9b51-1300d3e8a7ec/Version/75c16d33-e44a-482a-8491-bad383b86f69

Compliance Status is determined using a combination of fixed measurements from Defra’s Automatic Urban Rural Network and supplementary assessment. Supplementary assessment includes modelled background and roadside pollutant values from Defra’s Pollution Climate Mapping Model and measurements from Defra’s UK Urban NO2 Network (UUNN).

Locations of Bristol City Council operated air quality monitoring sites, which defines the areas of poor air quality in Bristol. Data displayed is annual nitrogen dioxide (NO2) concentrations measured using diffusion tubes. Green dots indicate concentrations, for the latest year of data available, below the national annual objective for this pollutant of 40 ug/m3. Yellow indicate concentrations between 40 ug/m3 and 60 ug/m3 and exceed the annual objective for this pollutant. Red dots show those locations with concentrations greater than 60 ug/m3. Data are bias adjusted and annualised where required. Full details of air quality monitoring results are reported to Defra on an annual basis. The most recent reports on air quality in Bristol are available for download at: https://www.bristol.gov.uk/pests-pollution-noise-food/air-quality

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. 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.

Emissions projected forward to 2025 and 2030 will be available soon.

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 year 2019, 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.

Documentation

• LAEI Summary Note (.PDF - 2.0 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, PM2.5and CO2, and a range of additional pollutants (SO2, CH4, VOC...) in tonnes/year for 2013, 2016 and 2019 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 - 58.5 MB)
• Emissions - Data - GIS Files (.ZIP - 66.4 MB)
• Emissions - Summary Dashboards (.ZIP - 338 KB)

Detailed Road Transport Road transport NOx, PM10, PM2.5and CO2 emissions in 2019 by vehicle type. PM emissions include split by exhaust, break wear and tyre wear. This data is provided at link level for major roads. Data are provided in several GIS formats.

• Emissions - Detailed Road Transport - Major Roads - Geopackage GPKG (.ZIP - 157.4 MB)
• Emissions - Detailed Road Transport - Major Roads - Mapinfo TAB (.ZIP - 124.7 MB)
• Emissions - Detailed Road Transport - Major Roads - ESRI SHP (.ZIP - 142.3 MB)

Concentrations This dataset includes modelled 2019 ground level concentrations of annual mean NOx, NO2, PM10 and PM2.5in 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 - 132.2 MB)
• Concentrations - Data - Excel Files (.ZIP - 180.4 MB)
• Concentrations - Maps - PDF / Image Files (.ZIP - 31.0 MB).
• Concentrations - Data - GIS Files (.ZIP - 95.4 MB). Includes GIS files in ESRI format to visualise the concentrations in a GIS software (ArcGIS).

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 - 62 KB)
• NO2 and PM2.5 School Exposure (.XLSX - 1.4 MB)
• NO2 and PM2.5 Hospital and Care Home Exposure (.XLSX - 37 KB)

1x1km background of Nitrogen Dioxide annual mean Limit Value concentrations modelled by Defra’s Pollution Climate Mapping Model.

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 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 year 2016, 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 have been zipped and need to be downloaded in several parts.

UPDATE 03/07/19 - The concentration maps and associated data (including population and school exposure data) have been reissued following a minor issue with the previous dataset. Please read the following note for further information: Updated LAEI 2016 Concentration Maps and Associated Data - July 2019 (.PDF - 146kB).

Documentation

• LAEI 2016 Methodology document (.PDF - 2.8MB)
• Regional Background Concentrations Update (.PDF - 646.3KB)

Supporting Information Key GIS geographies and road traffic flows and vehicle-kilometres for 2010, 2013 and 2016 for each vehicle type. Data are provided in Excel and GIS formats.

• Supporting Information - GIS geographies (.ZIP - 31.8MB)
• Supporting Information - Road Traffic Data - Excel (.ZIP - 211.9MB)
• Supporting Information - Road Traffic Data - GIS (.ZIP - 45.5MB)

Grid Emissions Summary This dataset includes emissions of NOx, PM10, PM2.5 and CO2in tonnes/year for 2010, 2013 and 2016 for each source category at a 1km grid square resolution, including 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 - 20.9MB)
• Emissions - Data - GIS Files (.ZIP - 18.1MB)
• Emissions - Summary Dashboards (.ZIP - 41 KB)
• Emissions – Data – Excel files – Other pollutants (.ZIP - 4.7 MB)

Detailed Road Transport Road transport emissions in 2010, 2013 and 2016 by vehicle type and also by pollutant. This data is presented at link level for major roads and at grid level for minor roads and cold start emissions. Data are provided in Excel and GIS formats.

• Emissions - Detailed Road Transport - Major Roads - Excel (.ZIP - 340.2KB)
• Emissions - Detailed Road Transport - Minor Roads & Cold Start - Excel (.ZIP - 25.8KB)
• Emissions - Detailed Road Transport - GIS (.ZIP - 436.9KB)

Concentrations This dataset includes modelled 2016 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 Excel, GIS and PDF formats.

• Concentrations - Data - ASCII Files (.ZIP - 86.4MB)
• Concentrations - Data - Excel Files (.ZIP - 139.2MB)
• Concentrations - Maps - PDF Files (.ZIP - 10.9MB). Update 03/04/19 - Note that the map of PM 2.5 annual mean concentrations for 2016 has been added to the zip file.
• Concentrations - Data - GIS Files (.ZIP - 126.4MB). Includes GIS files in ESRI format to visualise the concentrations in a GIS software (ArcGIS).

Population Exposure This dataset includes estimations of the number of Londoners and number of schools in London exposed to an annual average NO2 concentration above the Air Quality Strategy objective of 40µg/m3, based on the modelled 2016 ground level concentrations. A comparison with previous 2013 concentrations modelled for the LAEI 2013 inventory is also provided.

• NO2 Population Exposure (.XLSX - 25KB)
• NO2 and PM2.5 School Exposure (.XLSX - 269KB)

Roadside Nitrogen Dioxide annual mean compliance concentrations from AURN measurements, UUNN measurements and modelled by Defra’s Pollution Climate Mapping Model.

Monthly and annual average NO2 mean concentrations (µg/m3) from diffusion tubes across Cheshire East. NOTE - a figure of zero (0) indicates that there is no data for that month. All raw data is subject to Defra approved bias corrections and distance corrections where applicable. These two corrections are applied to the end of year annual average not the monthly data. As such the annual average will be different from the running average. Air Quality Management Area boundaries are also included on the map.

The LAEI 2013 has been superseded. Click here for the full list of releases.

The LAEI 2013 was published in 2016. However, due to revised road transport emission factors (COPERT 5) the data has been further updated in April 2017 (see 4.1 and 6.1)

Estimates of key pollutants (NOx, PM10, PM2.5 and CO2) are included for the base year 2013 and projected forward to 2020, 2025, and 2030. Emissions for previous years 2008 and 2010 are also provided, to allow comparison with previous versions of the LAEI.

The LAEI area covers the 32 London Boroughs and the City of London and up to the M25 motorway

Due to the size of the LAEI database this dataset has been zipped and needs to be downloaded in several parts.

0 - Documentation (.ZIP - 17.8 MB) - NEW

LAEI 2013 Methodology

1 - Supporting Information (.ZIP - 678.1 MB)

Key GIS geographies and road traffic flows and vehicle-kilometres.

2 - Grid Emissions Summary

Emissions by 1km grid square and source, for each inventory year as well as pivot tables to calculate borough and zone level statistics. Data is in Excel, Mapinfo and ArcGIS format.

• Excel Files (.ZIP - 131.8MB) - 14/04/16 Update - Please note that the Excel files have been updated, and now include an additional Pivot Table providing a summary of Road Transport emissions by Borough. 26/01/2017 Update - Please note that Emissions Summary for other pollutants has now been added to this section.
• GIS (Mapinfo) Files - (.ZIP - 212.5 MB) - 21/11/2016 Update - Please note that the Road Transport files for PM10 Major Roads have been updated.
• GIS (ArcGIS) Files - (.ZIP - 269.6 MB) - 21/11/2016 Update - Please note that the Road Transport files for PM10 Major Roads have been updated.

3 - Detailed Road Transport

Road transport emissions by vehicle type at link level for major roads and grid level for minor roads and cold start emissions.

• Major Roads - 2008 - Link Level (.XLSX - 352.8 MB)
• Major Roads - 2010 - Link Level (.XLSX - 364.8 MB)
• Major Roads - 2013 - Link Level (.XLSX - 332.2 MB)
• Major Roads - 2020 - Link Level (.XLSX - 363.4 MB)
• Major Roads - 2025 - Link Level (.XLSX - 361.2 MB)
• Major Roads - 2030 - Link Level (.XLSX - 373.2 MB)
• Minor Roads and Cold Start Emissions - All Years - Grid Level (.ZIP - 51.2 MB)

Emissions for LAEI 2013 Updated to follow soon.

4 - Concentrations (.ZIP - 1.6 GB)

Modelled 2013, 2020, 2025 and 2030 concentrations of NO2, NOx, PM10, PM10d and PM2.5 at 20m grid level. 04/04/17 - Please note that new LAEI 2013 Updated concentration files have now been included (see 4.1)

Due to the size of this database we recommend working on a local drive rather than over a network.

4.1. Concentrations LAEI 2013 Update (.ZIP - 767.837 KB) - NEW

Modelled 2013 and 2020 concentrations of NO2, NOx, PM10, PM10d and PM2.5 at 20m grid level. 04/04/2017 - Please note this file contains updated revised LAEI 2013 concentration data which should now replace files previously provided for 2013 and 2020.

UPDATE 03/04/19 - The concentration maps for 2013 and 2020 have been re-uploaded with colour schemes matching those used for the LAEI2016, to allow direct comparison between the maps.

• Concentrations - 2013 Maps - PDF Files (.ZIP - 12.2 MB)

• Concentrations - 2020 Maps - PDF Files (.ZIP - 11.1 MB)

  5 - Slides Presentations (.ZIP - 8.182 KB)

21/04/2016 - Please note that these slides have been added as a result of the LAEI 2013 Workshop on 14/04/2016

• LAEI2013Workshop_DataStructure - Description of the data structure in the LAEI2013
• LAEI2013Workshop_Trends - LAEI2013. Trends and comparisons
• LAEI2013Workshop_Focus Areas - Focus Areas Indentification Update

• LAEI2013Workshop_EmissionsFunctions - Emissions functions problems. Developing new ones

  6 - Greater London Concentration Maps - Images of NO2, PM10, PM10d and PM2.5 for all LAEI years at Greater London level. 04/04/17 - Please note that new LAEI 2013 Updated concentration maps have now been included (see 6.1)

Maps at borough level can be found in the LLAQM bespoke borough by borough 2013 air quality modelling and data, here

6.1 - Greater London concentration Maps LAEI 2013 Update (.ZIP - 424.442 KB) - NEW

Images of NO2, PM10, PM10d and PM2.5 for 2013 and 2020 Updated LAEI at Greater London level. 04/04/2017 - Please note this file contains updated revised LAEI 2013 concentration maps/images which should now replace images previously provided for 2013 and 2020.

Infrared radiances from the Limb Infrared Monitor of the Stratosphere (LIMS) instrument, mounted on the Nimbus-7 satellite, were stored on a Radiance Archive Tape (RAT). RAT data was used to derive a series of products, two of which are held here. Firstly, the LIMS Inverted Profile Archival Tape (LAIPAT). This dataset contains radiances (from RAT), which are used to derive daily inverted profiles of temperature, and mixing ratios, water vapour, nitric acid, and nitrogen dioxide. Profiles are geolocated. Secondly, the LIMS Map Archival Tape (LAMAT). This dataset was processed to create daily maps in the form of Fourier coefficients for each parameter at 18 pressure levels (from 0.05 to 100 mbar). Data are organised into 38 4 deg. latitude bands. Data for the daily maps are interpolated to the two synoptic time (0000 GMT for night and 1200 GMT for day). Also included is the day/night combined (averaged) data. This dataset is public. Please note that a major reprocessing of the Nimbus 7 LIMS data has recently been completed. The purpose of these activity was to take advantage of the changes in the spectral line parameters that have occurred since the original archived version was created and to generate a data version that is compatible with the UARS data sets. Improvements in the algorithm have also been made. More information is available from the LIMS homepage at http://lims.gats-inc.com/ and version 6 data can be downloaded from GES DAAC.

Infrared radiances from the Limb Infrared Monitor of the Stratosphere (LIMS) instrument, mounted on the Nimbus-7 satellite, were stored on a Radiance Archive Tape (RAT). RAT data was used to derive a series of products, two of which are held here. Firstly, the LIMS Inverted Profile Archival Tape (LAIPAT). This dataset contains radiances (from RAT), which are used to derive daily inverted profiles of temperature, and mixing ratios, water vapour, nitric acid, and nitrogen dioxide. Profiles are geolocated. Secondly, the LIMS Map Archival Tape (LAMAT). This dataset was processed to create daily maps in the form of Fourier coefficients for each parameter at 18 pressure levels (from 0.05 to 100 mbar). Data are organised into 38 4 deg. latitude bands. Data for the daily maps are interpolated to the two synoptic time (0000 GMT for night and 1200 GMT for day). Also included is the day/night combined (averaged) data. This dataset is public. Please note that a major reprocessing of the Nimbus 7 LIMS data has recently been completed. The purpose of these activity was to take advantage of the changes in the spectral line parameters that have occurred since the original archived version was created and to generate a data version that is compatible with the UARS data sets. Improvements in the algorithm have also been made. More information is available from the LIMS homepage at http://lims.gats-inc.com/ and version 6 data can be downloaded from GES DAAC.

This web map service (WMS) show Concentration Based Estimated Deposition (CBED) values of sulphur and nitrogen atmospheric deposition for 5x5 kilometre (km) grid squares of the UK averaged over the years 2013 to 2015. The maps show deposition values (kg ha-1 year-1) for oxidised nitrogen (NO2/NO3), reduced nitrogen (NH3/NH4) , non-marine sulphur (SO2/SO4) and base cations (Ca+Mg) . These total deposition values are the sum of four components calculated separately: wet deposition, dry deposition of gases, dry deposition of particulate matter and cloud droplet deposition. Habitat-specific data are provided for (i) moorland/short vegetation everywhere, and (ii) forest everywhere. Additionally, the grid square average over multiple land cover types (i.e. arable, grassland, forest, moorland, urban) is also provided.

Niveaux annuels du dioxyde d'azote en 2017 issus de la modélisation de l'agglomération de Metz.