Air pollution levels recorded on
Friday 10 September 2010, 09:00-10:00BST
How are the bands calculated?
Latest network hourly pollution bulletin
This map shows the latest hourly readings downloaded from network pollution analysers. Not all analysers on the network are contacted every hour, so some sites may show 'no data'. Data have undergone automatic validity checks.
Watford - Watford Town Hall
More Information for Watford - Watford Town Hall:
Monitoring site details
This week's graph
Annual statistics
switch to the latest daily bulletin (Wednesday)
View a previous bulletin (dd/mm/yyyy):
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