Monitoring Information
Automatic Monitoring
Click on the link below to see the locations of monitoring sites which automatically record the air quality around Heathrow on each hour of every day. You can click on a location on the map and then select an option from the list for further information about the monitoring. A full history of data from these locations can be downloaded from the Data Archive.
Map Showing Locations of Automatic Monitors .
Diffusion Tube Monitoring
Click on the link below to see the locations of monitors which take measurements of air quality around Heathrow averaged over weekly, fortnightly or monthly periods. These are small low-cost samplers which can be distributed over a wide area. Map Showing Locations of Diffusion Tube Monitors
A full history of data from these locations can be downloaded from the Data Archive
