Nitrogen Dioxide - public exposure

MQT on 2013-10-23
Session date: 
October 23, 2013
Question By: 
Stephen Knight
Liberal Democrats
Asked Of: 
The Mayor


According to the latest version of the London Atmospheric Emissions Inventory (LAEI), how many people in each London borough were exposed to concentrations of nitrogen dioxide exceeding the legal annual limit value in 2012?


Answer for Nitrogen Dioxide - public exposure

Answer for Nitrogen Dioxide - public exposure

Answered By: 
The Mayor

This information, including a breakdown by borough, is available on the GLA website at:

Significant progress has been made reducing human exposure to air pollution in London since I became Mayor. This has taken place against a challenging backdrop, including underperforming Euro standards and dieselisation.

In 2008 around 3.6 million Londoners were estimated to live in areas exceeding the EU legal annual limit value for NO2. However thanks to the measures I have implemented, including tighter low emission zone standards, cleaning up the bus fleet and retiring more than 3,000 of the oldest most polluting taxis, by 2012 this figure was estimated to have more than halved to 1.7 million Londoners (or about 20% of the population).

On current trends, by 2016 I expect the figure to further reduce to around 1 million people and by 2020 to be around 300,000, mainly in central London. Consequently, I have proposed a central London Ultra Low Emission Zone from 2020 and other measures to help address these remaining hotspots.