Birmingham Air Quality Diffusion Tubes

Another method of monitoring air pollution is undertaken by Diffusion Tubes. These are small plastic test tubes that are placed on lampposts and changed every month. After 12 calendar months of data is collected an annual average is calculated. Click on the points to see the readings, and use the drop down menu to change the year. You can also down load the data using the links on the side.

Air quality index key
40+ Elevated
36-40 Slightly elevated
30-36 Low
<30 Very Low

Downloadable Resources  
Text  I View and download a txt of the data
Excel  I View and download an xls sheet of the data