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Delhi Street, St.Thomas B Delhi Street, St.Thomas B

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

Delhi Street, St.Thomas B

NO2 Diffusion Tube sites
Delhi Street, St.Thomas B in 2017

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Nitrogen dioxide

Date NO2 Units
04/01/2017  49* ugm-3
01/02/2017  52* ugm-3
01/03/2017  41* ugm-3
29/03/2017  37* ugm-3
26/04/2017  35* ugm-3
31/05/2017  28* ugm-3
28/06/2017  22* ugm-3
02/08/2017  17* ugm-3
01/11/2017  31* ugm-3
06/12/2017  45* ugm-3

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

Use the buttons above to view data for years between 2005 and 2017

Further data and graphs may be downloaded here.

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