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4 Ashfield House , Mount Pleasant , Chepstow NP16 5PT 4 Ashfield House , Mount Pleasant , Chepstow NP16 5PT

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

4 Ashfield House , Mount Pleasant , Chepstow NP16 5PT

NO2 Diffusion Tube sites
4 Ashfield House , Mount Pleasant , Chepstow NP16 5PT in 2017

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Nitrogen dioxide

Date NO2 Units
04/01/2017  45* ugm-3
29/03/2017  33* ugm-3
26/04/2017  33* ugm-3
31/05/2017  20* ugm-3
28/06/2017  26* ugm-3
02/08/2017  24* ugm-3
30/08/2017  27* ugm-3

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

Use the buttons above to view data for years between 2006 and 2017

Further data and graphs may be downloaded here.

For more information on this monitoring data please contact this local authority at environmentalhealth@monmouthshire.gov.uk