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Index Banded Annual Totals for Swansea:
LOW
110 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)

 26 Dillwyn Road, Sketty - facade diffusion tube
2005
Oct 2005 35.60 µg/m3
Nov 2005 46.60 µg/m3
Dec 2005 51.60 µg/m3
Average 2005 44.60 µg/m3
2006
Jan 2006 46.70 µg/m3
Feb 2006 48.50 µg/m3
Mar 2006 33.40 µg/m3
Apr 2006 39.30 µg/m3
May 2006 32.00 µg/m3
Jun 2006 37.30 µg/m3
Jul 2006 35.80 µg/m3
Aug 2006 28.90 µg/m3
Sep 2006 31.60 µg/m3
Oct 2006 40.80 µg/m3
Nov 2006 50.10 µg/m3
Dec 2006 40.10 µg/m3
Average 2006 38.71 µg/m3
2007
Jan 2007 34.10 µg/m3
Feb 2007 39.80 µg/m3
Mar 2007 39.10 µg/m3
Apr 2007 37.50 µg/m3
May 2007 34.80 µg/m3
Jun 2007 34.80 µg/m3
Jul 2007 27.90 µg/m3
Aug 2007 32.20 µg/m3
Sep 2007 39.00 µg/m3
Oct 2007 49.80 µg/m3
Nov 2007 53.90 µg/m3
Dec 2007 45.20 µg/m3
Average 2007 39.01 µg/m3
2008
Jan 2008 42.00 µg/m3
Feb 2008 48.80 µg/m3
Mar 2008 42.80 µg/m3
Apr 2008 39.40 µg/m3
May 2008 39.00 µg/m3
Jun 2008 28.50 µg/m3
Jul 2008 30.40 µg/m3
Aug 2008 27.90 µg/m3
Sep 2008 40.90 µg/m3
Oct 2008 25.50 µg/m3
Nov 2008 45.30 µg/m3
Dec 2008 45.40 µg/m3
Average 2008 37.99 µg/m3
2009
Jan 2009 45.00 µg/m3
Feb 2009 50.30 µg/m3
Mar 2009 46.60 µg/m3
Apr 2009 42.70 µg/m3
Average 2009 46.15 µg/m3
2012
Jan 2012 41.00 µg/m3
Apr 2012 34.90 µg/m3
May 2012 30.70 µg/m3
Jun 2012 21.40 µg/m3
Jul 2012 24.20 µg/m3
Aug 2012 24.40 µg/m3
Average 2012 29.43 µg/m3
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