London pollution sources map

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. Download the data »

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.

Watch the video here for more information on the modelled dataset and a demo of how to use the map.

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.
Individual sources	Other	Other sources such as home and garden activities and in the case of PM2.5 – waste transfer services.

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London