PM 10 Emissions 1

MQT on 2009-11-18
Session date: 
November 18, 2009
Question By: 
Murad Qureshi
Labour Group
Asked Of: 
The Mayor


By how many tonnes does London have to reduce PM10 emissions from 2009 levels in order to meet the EU limit by 2011?


Answer for PM 10 Emissions 1

Answer for PM 10 Emissions 1

Answered By: 
The Mayor

Ensuring universal compliance with EU air quality objectives is not simply a matter of reducing the total tonnage of emissions. For example, on days where PM10 exceeds air quality objectives, up to one half of the PM in the air can originate from sources outside London.

The annual mean limit value for PM10 has been consistently met since 2006 but modelling of emissions for PM10 in 2011 show that there will remain a few areas near the busiest roads in central London that will remain at risk of exceeding the daily mean limit value.

We estimate that measures in the Strategy will reduce the overall PM10 emissions from sources within London by 470 tonnes or 20 per cent (between 2006 and 2012). Figures are not yet available for 2009 emissions. The Strategy combines general Londonwide measures with targeted localised measures focused where we believe PM10 will be a greater problem.