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This section of the website allows you to choose a type of monitoring site, and then details for individual sites. Once you have chosen a site, its location will appear on the map above.

Choose a different type of monitoring site:
Hydocarbon Diffusion Tube sitesHydocarbon Diffusion Tube sites (8 Sites)
NO2 Diffusion Tube sitesNO2 Diffusion Tube sites (988 Sites)
O3 Diffusion Tube sitesO3 Diffusion Tube sites (6 Sites)
SO2 Diffusion Tube sitesSO2 Diffusion Tube sites (9 Sites)

Non-Automatic Monitoring Sites in Wales

Malpas Road (378)

NO2 Diffusion Tube sites
Malpas Road (378) in 2012

2009 2010 2011 2012

Nitrogen dioxide

Date NO2 Units
01/02/2012  37 ugm-3
26/04/2012  51 ugm-3
31/05/2012  39 ugm-3
27/06/2012  41 ugm-3
01/08/2012  38 ugm-3
29/08/2012  42 ugm-3
29/09/2012  35 ugm-3
31/10/2012  53 ugm-3

Ratification Status:
» Red* - Provisional
» Green - Ratified

Use the buttons above to view data for years between 2009 and 2012

Further data and graphs may be downloaded here.

For more information on this monitoring data please contact this local authority at