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Ty Gwenllian, High Street Ty Gwenllian, High Street

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.

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Hydocarbon Diffusion Tube sitesHydocarbon Diffusion Tube sites (8 Sites)
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Non-Automatic Monitoring Sites in Wales

Ty Gwenllian, High Street

NO2 Diffusion Tube sites
Ty Gwenllian, High Street in 2017

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Nitrogen dioxide

Date NO2 Units
04/01/2017  54* ugm-3
01/02/2017  48* ugm-3
01/03/2017  38* ugm-3
26/04/2017  36* ugm-3
31/05/2017  30* ugm-3
28/06/2017  25* ugm-3
02/08/2017  21* ugm-3
27/09/2017  27* ugm-3
01/11/2017  31* ugm-3
06/12/2017  43* ugm-3

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

Use the buttons above to view data for years between 2010 and 2017

Further data and graphs may be downloaded here.

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