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1st Floor, 18/20 Vivian Road 1st Floor, 18/20 Vivian Road

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 (986 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

1st Floor, 18/20 Vivian Road

NO2 Diffusion Tube sites
1st Floor, 18/20 Vivian Road in 2017

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Nitrogen dioxide

Date NO2 Units
01/02/2017  52* ugm-3
01/03/2017  40* ugm-3
29/03/2017  38* ugm-3
26/04/2017  30* ugm-3
31/05/2017  34* ugm-3
28/06/2017  31* ugm-3
02/08/2017  24* ugm-3
27/09/2017  26* ugm-3

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

Use the buttons above to view data for years between 2009 and 2017

Further data and graphs may be downloaded here.

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