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Index Banded Annual Totals for Swansea:
LOW
93 days
MODERATE
18 days
HIGH
1 day
VERY HIGH
4 days
annual air quality totals for all Swansea monitoring stations

Diffusion Tubes - Nitrogen Dioxide (NO2)

 14 Clarence Street - facade diffusion tube
2005
Oct 2005 35.30 µg/m3
Nov 2005 40.90 µg/m3
Dec 2005 41.50 µg/m3
Average 2005 39.23 µg/m3
2006
Jan 2006 45.40 µg/m3
Feb 2006 41.80 µg/m3
Mar 2006 31.20 µg/m3
Apr 2006 22.70 µg/m3
May 2006 22.20 µg/m3
Jun 2006 24.80 µg/m3
Jul 2006 20.90 µg/m3
Aug 2006 17.10 µg/m3
Sep 2006 24.50 µg/m3
Oct 2006 35.60 µg/m3
Nov 2006 38.80 µg/m3
Dec 2006 22.80 µg/m3
Average 2006 28.98 µg/m3
2007
Jan 2007 25.00 µg/m3
Feb 2007 42.60 µg/m3
Mar 2007 32.20 µg/m3
Apr 2007 39.90 µg/m3
Aug 2007 13.20 µg/m3
Sep 2007 26.90 µg/m3
Oct 2007 48.00 µg/m3
Nov 2007 38.80 µg/m3
Dec 2007 44.00 µg/m3
Average 2007 34.51 µg/m3
2008
Jan 2008 25.70 µg/m3
Feb 2008 45.40 µg/m3
Mar 2008 30.00 µg/m3
Apr 2008 31.80 µg/m3
May 2008 50.00 µg/m3
Jun 2008 18.60 µg/m3
Jul 2008 18.00 µg/m3
Aug 2008 15.90 µg/m3
Sep 2008 33.60 µg/m3
Oct 2008 25.40 µg/m3
Nov 2008 38.30 µg/m3
Dec 2008 40.90 µg/m3
Average 2008 31.13 µg/m3
2009
Jan 2009 38.00 µg/m3
Feb 2009 47.10 µg/m3
Mar 2009 34.50 µg/m3
Apr 2009 30.10 µg/m3
Average 2009 37.42 µg/m3
2012
Jan 2012 41.80 µg/m3
Apr 2012 23.50 µg/m3
May 2012 31.80 µg/m3
Jun 2012 18.80 µg/m3
Jul 2012 16.50 µg/m3
Aug 2012 19.60 µg/m3
Average 2012 25.33 µg/m3
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