This map shows the maxiumum daily readings downloaded from LAQN pollution analysers during the episode, in and around Barking and Dagenham. 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.
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: