These are Excel data files from Defra's UK Particulate Monitoring Research Programme - 1998 to 2006. Data from the Defra statutory monitoring networks for EC Directive compliance are stored separately in the Air Quality Archive (on-line database).
SMPS = Scanning Mobility Particle Sizer
CPC = Condensation Particle Counter
If you have difficulty viewing a file, please right mouse click and then select 'Save Target to' from the menu to download the monitoring data.
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