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M4 Groundhog 1 M4 Groundhog 1

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

M4 Groundhog 1

NO2 Diffusion Tube sites
M4 Groundhog 1 in 2017

2013 2014 2015 2016 2017

Nitrogen dioxide

Date NO2 Units
04/01/2017  84* ugm-3
01/02/2017  84* ugm-3
01/03/2017  81* ugm-3
29/03/2017  80* ugm-3
26/04/2017  74* ugm-3
31/05/2017  64* ugm-3
28/06/2017  72* ugm-3
02/08/2017  59* ugm-3
30/08/2017  62* ugm-3
27/09/2017  60* ugm-3

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

Use the buttons above to view data for years between 2013 and 2017

Further data and graphs may be downloaded here.

For more information on this monitoring data please contact this local authority at Andrew.Williams@newport.gov.uk