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Dark Street, Haverfordwest Dark Street, Haverfordwest
Dark Street, Haverfordwest Dark Street, Haverfordwest

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 (1013 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

Dark Street, Haverfordwest

Hydocarbon Diffusion Tube sites
Dark Street, Haverfordwest in 2013

«« 2009 2010 2011 2012 2013 »»


Ethyl Benzene




Total Xylenes

Date Benzene Units
03/01/2013  0.56* ugm-3
31/01/2013  0.81* ugm-3
29/05/2013  0.81* ugm-3
26/06/2013  0.72* ugm-3
31/07/2013  1.60* ugm-3
29/08/2013  1.00* ugm-3
30/10/2013  0.77* ugm-3

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

Use the buttons above to view data for years between 1998 and 2013

Further data and graphs may be downloaded here.

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