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Pollution Episodes

Details of major pollution episodes including peak values recorded across Ealing Council.

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PM10 High and Mod March 2021 - Release date [07/04/2021]
'High' and 'moderate' PM10 Pollution Incident Notification for 31st March 2021 Issued: 7th April 2021 Widespread 'moderate' PM10 were measured across south-east England on Wednesday 31st March due to southerly winds bringing pollution from France, combining with local emissions. Included in this airflow was Saharan Dust which had been affecting the Iberian Peninsula and southern Europe during the last week. 'Moderate' PM10 were measured at three roadside and industrial sites on Tuesday 30th March, then levels increased through Wednesday 31st March with widespread 'moderate' levels across the whole of London with parts of Leicester and Kent also affected. ‘High’ levels were also reached at three roadside and Industrial sites on 31st March. ‘Moderate’ and ‘high’ PM10 occurred mainly at roadside locations in London on 31st March and just one background site. Back trajectories indicate air arriving from France on Wednesday 31st March, but also the occurrence of 'moderate' PM10 mainly at roadside sites, suggests a large contribution from local emissions. The PM10 episode is thought to be the result of imported of Saharan Dust combining with local emissions which had been building in the still conditions of the evening, leading to poor dispersion. Pollution levels reduced on the 1st April with a change to northerly winds. The current situation can be followed on London: www.londonair.org.uk Sussex www.sussex-air.net Essex www.essexair.org.uk Hampshire www.hantsair.org.uk Sussex www.sussex-air.net including sites Berkshire, Essex and Surrey. Hima Chouhan Duty Forecaster

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