Skip Navigation [Access Key S]
A55, Bangor A55, Bangor

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 (1001 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

A55, Bangor

NO2 Diffusion Tube sites
A55, Bangor in 2015

2011 2012 2013 2014 2015

Nitrogen dioxide

Date NO2 Units
07/01/2015  23 ugm-3
04/02/2015  33 ugm-3
04/03/2015  16 ugm-3
01/04/2015  36 ugm-3
29/04/2015  36 ugm-3
27/05/2015  26 ugm-3
26/08/2015  31 ugm-3
30/09/2015  40 ugm-3
28/10/2015  43 ugm-3
02/12/2015  22 ugm-3

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

Use the buttons above to view data for years between 2011 and 2015

Further data and graphs may be downloaded here.

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