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Index Banded Annual Totals for Swansea:
LOW
113 days
MODERATE
10 days
HIGH
1 day
VERY HIGH
5 days
annual air quality totals for all Swansea monitoring stations

Diffusion Tubes - Nitrogen Dioxide (NO2)

 10 St.Helens Road - facade diffusion tube
2006
Apr 2006 37.60 µg/m3
May 2006 41.10 µg/m3
Jun 2006 44.80 µg/m3
Jul 2006 48.20 µg/m3
Aug 2006 29.80 µg/m3
Sep 2006 45.80 µg/m3
Oct 2006 57.30 µg/m3
Nov 2006 49.10 µg/m3
Dec 2006 32.70 µg/m3
Average 2006 42.93 µg/m3
2007
Jan 2007 37.90 µg/m3
Feb 2007 56.80 µg/m3
Mar 2007 42.50 µg/m3
Apr 2007 51.30 µg/m3
May 2007 34.10 µg/m3
Jun 2007 44.00 µg/m3
Jul 2007 24.80 µg/m3
Aug 2007 29.00 µg/m3
Sep 2007 37.80 µg/m3
Oct 2007 63.20 µg/m3
Nov 2007 54.90 µg/m3
Dec 2007 58.10 µg/m3
Average 2007 44.53 µg/m3
2008
Jan 2008 43.20 µg/m3
Feb 2008 58.30 µg/m3
Mar 2008 40.70 µg/m3
Apr 2008 43.70 µg/m3
May 2008 71.30 µg/m3
Jun 2008 30.60 µg/m3
Jul 2008 34.80 µg/m3
Aug 2008 30.60 µg/m3
Sep 2008 47.00 µg/m3
Oct 2008 44.60 µg/m3
Nov 2008 48.60 µg/m3
Dec 2008 56.30 µg/m3
Average 2008 45.81 µg/m3
2009
Jan 2009 62.90 µg/m3
Feb 2009 51.10 µg/m3
Mar 2009 42.70 µg/m3
Apr 2009 57.30 µg/m3
Average 2009 53.50 µg/m3
2012
Jan 2012 53.50 µg/m3
Apr 2012 26.70 µg/m3
May 2012 39.90 µg/m3
Jun 2012 40.30 µg/m3
Jul 2012 27.80 µg/m3
Aug 2012 31.60 µg/m3
Average 2012 36.63 µg/m3
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