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Imperial College London

LAQN Pollution Episodes

Thurrock - London Road (Purfleet) (Level 3)

Reigate and Banstead - Horley FIDAS (closed)

Elmbridge - Hampton Court Parade (closed)

Reigate and Banstead- Earlswood Depot (closed)

Windsor and Maidenhead - Aldebury Road (closed)

Thurrock - Dock Road Tilbury (closed)

Elmbridge - Walton High Street (closed)

Castle Point - Hadleigh (Level 1)

Reigate and Banstead - Horley (Level 2)

Dacorum - High Street Northchurch (Level 1)

Thurrock - Calcutta Road Tilbury (Level 1)

Reigate and Banstead - Horley South East (closed)

Sevenoaks - Sevenoaks Quarry (closed)

Brentwood - Brentwood Town Hall (Level 1)

Castle Point - Canvey Island (closed)

Thurrock - Stanford-le-Hope (Level 2)

Windsor and Maidenhead - Frascati Way (Level 1)

Thurrock - Purfleet (closed)

Thurrock - London Road (Grays) (Level 4)

Windsor and Maidenhead - Clarence Road (Level 2)

Windsor and Maidenhead - Ascot (closed)

Elmbridge - Bell Farm Hersham (closed)

Elmbridge - Esher High Street (closed)

Mole Valley - Leatherhead (closed)

Mole Valley - Lower Ashtead (closed)

Sevenoaks - Bat and Ball (Level 2)

Mole Valley - Dorking (Level 2)

Sevenoaks - Greatness Park (Level 5)

Reigate and Banstead - Reigate High St (closed)

Reigate and Banstead - A23 Hooley (closed)

Reigate and Banstead - Horley South (Level 1)

Reigate and Banstead - Poles Lane (Level 6)

Map of the south east

Peak air pollution levels recorded during episode

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Low (1-3)	Moderate (4-6)	High (7-9)
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Very High (10)	No Data	Closed
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How the bands are calculated

Bulletins
Site Details
Statistics
Pollution Episodes

Episode	Ozone episode July 2013
Location	London
Pollutant(s)	O3
Dates	06/07/2013 to 09/07/2013

This map shows the peak readings recorded across the region during the episode you have selected. Note that you can see each daily bulletin using the archive on the bulletin tab, and can also see animations and text explanations (if available) by selecting a different map view.
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You can find out more information about levels recorded at each location (monitoring site) by clicking on its dot. Alternatively, select a different map view by using the drop down box below: