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This page contains the monitoring data compiled by the Housing and Public Protection Department over the last few years. Results are shown for the following monitoring techniques:
- Diffusion Tubes
- Partisol Plus PM10 Monitors
Results for the Automatic Urban and Rural Network station can be accessed at either of the following external websites:
Welsh Air Quality Archive
The Air Quality Archive
(Gaps in the data sets indicate periods where the monitoring data is not available).
Benzene Graphs
Benzene Graphs - Excel format 51Kb 
NO2 Graphs
NO2 Graphs - Excel format 415Kb 
Ozone Graphs
Ozone Graphs - Excel format 47Kb 
PM10 Graphs
PM10 Graphs - Excel format 266Kb 
SO2 Graphs
SO2 Graphs - Excel format 99Kb 

To view or download any spreadsheet (.XLS) document
you will normally require Microsoft Excel to be installed on your computer.
If you do not have Microsoft Excel then an Excel Viewer is freely available
from Microsoft - download
the free Microsoft Excel Viewer 2003 for Windows 2000, Windows Server 2003, Windows XP.
The Microsoft Excel Viewer will allow you to view
the document and print the document, it will not allow you to edit it.
Please install the Excel viewer after downloading the software.
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