Map displays modelled annual mean NOx and PM2.5 concentrations for 2019. Datasets produced by Cambridge Environmental Research Consultants (CERC) using the LAEI 2013 dataset and the ADMS-Urban model as part of the Breathe London Pilot project.

The London pollution sources map uses high-resolution source apportionment modelling data that was produced by Cambridge Environmental Research Consultants (CERC) as part of the Breathe London pilot project.

How to use the map

The map can be navigated by using the mouse to pan and the scroll wheel to zoom in and out. Use the left hand panel to select the pollutant and sources of interest, as well as toggle additional layers showing schools, hospitals and administrative boundaries like the Ultra Low Emission Zone.

Clicking on the map displays the modelled concentration of the selected source or sources at that location, as well as the percentage of total pollution that concentration represents. When you click on a location on the map, a chart on the right also displays the percentage of total pollution that the selected source or sources represent.

The map data

These pollution estimates are based on a London emissions scenario for 2019, created by CERC using data from the London Atmospheric Emissions Inventory 2013. This emissions data is used in an air dispersion model called ADMS-Urban, which combines them with information on meteorology, urban topography, and the effects of seasonality and time-of-day to estimate the concentration of pollutants from each separate source at a 10x10m grid resolution across Greater London.

All individual sources are listed and described below, with the addition of air pollution that is not produced in London but is transported into the city by the wind from further away. This additional component is known as ‘background.’

Road transport

Individual sources Taxis All London Black Cabs.
Motorcycles All motorcycles.
Diesel  cars Diesel cars used to transport people.
Petrol cars Petrol and hybrid cars used to transport people.
Diesel LGVs Diesel light goods vehicles (LGVs) including vans.
Petrol LGVs Petrol light goods vehicles (LGVs) including vans.
Articulated HGVs Large, heavy goods vehicles (HGVs) with articulated chassis including artic lorries.
Rigid HGVs Large, heavy goods vehicles (HGVs).
TfL Buses Transport for London (TfL) operated buses.
Non-TfL Buses and Coaches Non-TfL operated buses and coaches.
Brake, Tyre and Road Wear PM2.5 resulting from brake and tyre wear and resuspended by road surface wear.
Grouped sources All cars Petrol and diesel cars.
All cars and taxis All cars and London Black Cabs.
All smaller vehicles All cars, London Black Cabs, motorcycles.
Diesel cars and taxis Diesel cars and London Black Cabs.
Diesel cars and LGVs Diesel cars and diesel LGVs.
Petrol cars and LGVs Petrol cars and petrol LGVs.
All LGVs Diesel LGVs and petrol LGVs.
All HGVs Rigid HGVs and Articulated HGVs.
All buses TfL buses, Non-TfL buses and coaches.
All diesel vehicles Diesel cars, London Black Cabs, diesel LGVs, all buses and coaches.
All heavy vehicles All HGVs, all buses and coaches.
All larger vehicles All LGVs, all HGVs, all buses and coaches.

Other Transport

Individual sources Aviation Aircraft including idling of the engine on the stand, taxiing, take off and descent.
Rail Diesel fueled trains, including regional and national.
Passenger shipping Ships transporting people.
Commercial shipping Ships transporting goods.

Commercial and Domestic Fuel

Individual sources Domestic gas Combustion of gas and other fuels to produce heat and power for homes.
Commercial gas Combustion of gas to produce heat and power for commercial buildings.
Domestic other fuels Other solid and liquid fuel combustion to produce heat and power.
Commercial other fuels Other solid and liquid fuel combustion to produce heat and power.
Grouped sources All commercial Combustion of gas, solid and liquid fuel to produce heat and power for commercial buildings.
All domestic Combustion of gas, solid and liquid fuel to produce heat and power for homes.
All gas Combustion of gas to produce heat and power for homes and commercial buildings.

Industrial and Construction

Individual sources Industry Sources of pollution related to industries including waste management and energy production.
Dust Construction and demolition dust.
Non-Road Mobile Machinery (NRMM) Includes mobile construction machines fitted with an internal combustion engine like diesel generators, concrete crushers and excavators.

Miscellaneous

Individual sources Sewage Treatment Works Plants where sewage is treated.
Other Other sources such as home and garden activities and in the case of PM2.5 – waste transfer services.
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