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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 (1018 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

Croes Atti School, Flint.

NO2 Diffusion Tube sites
Croes Atti School, Flint. in 2012

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Nitrogen dioxide

Date NO2 Units
04/01/2012  11 ugm-3
01/02/2012  22 ugm-3
28/03/2012  23 ugm-3
27/06/2012  15 ugm-3
29/08/2012  26 ugm-3
26/09/2012  14 ugm-3
28/11/2012  18 ugm-3

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

Use the buttons above to view data for years between 1997 and 2012

Further data and graphs may be downloaded here.

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