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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 (1010 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

Bassaleg Road (162/2)

NO2 Diffusion Tube sites
Bassaleg Road (162/2) in 2012

2011 2012

Nitrogen dioxide

Date NO2 Units
01/02/2012  37 ugm-3
26/04/2012  34 ugm-3
31/05/2012  30 ugm-3
27/06/2012  25 ugm-3
01/08/2012  20 ugm-3
29/08/2012  27 ugm-3
29/09/2012  42 ugm-3
31/10/2012  40 ugm-3

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

Further data and graphs may be downloaded here.

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